TY  - JOUR
AU  - Nikolić, Vesna D.
AU  - Đokić, Jovana M.
AU  - Dinić, Denis P.
AU  - Marinković, Aleksandar 
AU  - Jevtić, Sanja O.
AU  - Anđić, Zoran M.
AU  - Kamberović, Željko J.
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6235
AB  - Porozna keramika sa industrijskog aspekta predstavlja značajan materijal, međutim, za njenu pripremu se još uvek traže ekonomski i tehnološki prihvatljiva rešenja. Kontrola poroznosti predstavlja ključan korak u postizanju željenih svojstava za određenu primenu. U cilju dobijanja multiporozne keramike u ovom radu korišćena je kaolinska glina i polistirenske perle kao organska žrtvena faza. Uzorci su nakon mešanja sinterovani na 1050 oC tokom 1 h. Karakterizacija je obuhvatila infracrvenu spektroskopiju sa Furijeovom transformacijom (FTIR), 
 kenirajuću elektronsku mikroskopiju (SEM), rendgensku difrakcionu analizu (XRPD), elementnu CHNS analizu i ispitivanje pritisne čvrstoće. Analiza dobijenih rezultata pokazala je da se hijerarhijski uređena, multiporozna keramika, odgovarajućih mehaničkih svojstava može pripremiti u prisustvu organske komponente čijim sagorevanjem tokom sinterovanja zaostaju pore različitih dimenzija.
AB  - From an industrial point of view, porous ceramics represent an important material, however, economically and technologically acceptable solutions are still being sought for its preparation. Porosity control is a key step in achieving the desired properties for a specific application. In order to obtain multiporous ceramics, in this work, kaolin clay and polystyrene beads were used as organic sacrificial phase. After mixing, the samples were sintered at 1050 oC for 1 h. Characterization included Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction analysis (XRPD), elemental CHNS analysis and compressive strength investigations. The analysis of the obtained results showed that hierarchically ordered, multiporous ceramics, with appropriate mechanical properties can be prepared in the presence of an organic component whose burnout during sintering leaves behind pores of different dimensions.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika - Novi materijali
T1  - Sinteza inovativnih keramičkih sorbenata i nosača katalizatora hijerarhijske poroznosti
VL  - 32
IS  - 3
SP  - 269
EP  - 273
DO  - 10.5937/tehnika2303269K
ER  - 

@article{
author = "Nikolić, Vesna D. and Đokić, Jovana M. and Dinić, Denis P. and Marinković, Aleksandar  and Jevtić, Sanja O. and Anđić, Zoran M. and Kamberović, Željko J.",
year = "2023",
abstract = "Porozna keramika sa industrijskog aspekta predstavlja značajan materijal, međutim, za njenu pripremu se još uvek traže ekonomski i tehnološki prihvatljiva rešenja. Kontrola poroznosti predstavlja ključan korak u postizanju željenih svojstava za određenu primenu. U cilju dobijanja multiporozne keramike u ovom radu korišćena je kaolinska glina i polistirenske perle kao organska žrtvena faza. Uzorci su nakon mešanja sinterovani na 1050 oC tokom 1 h. Karakterizacija je obuhvatila infracrvenu spektroskopiju sa Furijeovom transformacijom (FTIR), 
 kenirajuću elektronsku mikroskopiju (SEM), rendgensku difrakcionu analizu (XRPD), elementnu CHNS analizu i ispitivanje pritisne čvrstoće. Analiza dobijenih rezultata pokazala je da se hijerarhijski uređena, multiporozna keramika, odgovarajućih mehaničkih svojstava može pripremiti u prisustvu organske komponente čijim sagorevanjem tokom sinterovanja zaostaju pore različitih dimenzija., From an industrial point of view, porous ceramics represent an important material, however, economically and technologically acceptable solutions are still being sought for its preparation. Porosity control is a key step in achieving the desired properties for a specific application. In order to obtain multiporous ceramics, in this work, kaolin clay and polystyrene beads were used as organic sacrificial phase. After mixing, the samples were sintered at 1050 oC for 1 h. Characterization included Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction analysis (XRPD), elemental CHNS analysis and compressive strength investigations. The analysis of the obtained results showed that hierarchically ordered, multiporous ceramics, with appropriate mechanical properties can be prepared in the presence of an organic component whose burnout during sintering leaves behind pores of different dimensions.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika - Novi materijali",
title = "Sinteza inovativnih keramičkih sorbenata i nosača katalizatora hijerarhijske poroznosti",
volume = "32",
number = "3",
pages = "269-273",
doi = "10.5937/tehnika2303269K"
}

Nikolić, V. D., Đokić, J. M., Dinić, D. P., Marinković, A., Jevtić, S. O., Anđić, Z. M.,& Kamberović, Ž. J.. (2023). Sinteza inovativnih keramičkih sorbenata i nosača katalizatora hijerarhijske poroznosti. in Tehnika - Novi materijali
Beograd : Savez inženjera i tehničara Srbije., 32(3), 269-273.
https://doi.org/10.5937/tehnika2303269K

Nikolić VD, Đokić JM, Dinić DP, Marinković A, Jevtić SO, Anđić ZM, Kamberović ŽJ. Sinteza inovativnih keramičkih sorbenata i nosača katalizatora hijerarhijske poroznosti. in Tehnika - Novi materijali. 2023;32(3):269-273.
doi:10.5937/tehnika2303269K .

Nikolić, Vesna D., Đokić, Jovana M., Dinić, Denis P., Marinković, Aleksandar , Jevtić, Sanja O., Anđić, Zoran M., Kamberović, Željko J., "Sinteza inovativnih keramičkih sorbenata i nosača katalizatora hijerarhijske poroznosti" in Tehnika - Novi materijali, 32, no. 3 (2023):269-273,
https://doi.org/10.5937/tehnika2303269K . .

TY  - CONF
AU  - Đokić, Jovana
AU  - Štulović, Marija
AU  - Korać, Marija
AU  - Anđić, Zoran
AU  - Kamberović, Željko
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6305
AB  - More than 90 % of lead produced in Europe comes from secondary lead flows, of
which 85 % is attributed to waste lead-acid batteries (LAB). The main technological
approach for LAB processing implies pyrometallurgy by which 100–400 kg of waste slag
(WS) is generated per 1 ton of produced metallic lead. Due to recycling process parameters,
generated WS has great potential for releasing toxic elements contributing to environmental
pollution [1]. Namely, the most common flux in the recycling process is sodium-based
(Na2CO3) when alkali lead waste slag (ALWS) is generated, characterized as hazardous due
to its physical-chemical characteristics: high leachability, hygroscopic and pulverized
nature and, ultimately, instability [2,3]. Therefore, ALWS treatment prior to disposal should
be considered an integral part of waste LAB treatment systems. Immobilization of toxic
elements contained in slag is crucial and can be achieved by stabilization/solidification
processes (S/S) as one of the most widely used technologies in the treatment of heavy metal containing wastes for final disposal or utilization.
In this research, ALWS generated in the waste LAB recycling is used to determine
the S/S process efficiency as a function of the added binder amount (cement, in the range of
5 – 10 %), pre-treatment (the removal of water-soluble compounds), and activator addition
(MgO). The liquid to solid (L/S) ratio was 1/4 in all S/S experiments. The basic parameters
for the effectiveness assessments were compressive strength (UCS) and pollutants leaching
(Method 1311 Toxicity characteristic leaching procedure, TCLP).
The conclusion is that, contrary to the pre-treatment process, the addition of MgO has
an overall positive effect on the S/S process of ALSW, ensuring both mechanical and
chemical stability. This ALWS solidificate, obtained through the S/S process by using MgO
as an activator, is safe for disposal, according to environmental regulations.
PB  - Belgrade : Serbian Chemical Society
C3  - 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023
T1  - Stabilization/solidification process of alkali lead waste slag: influence of pre-treatment and addition of selected additives
SP  - 177
EP  - 178
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6305
ER  - 

@conference{
author = "Đokić, Jovana and Štulović, Marija and Korać, Marija and Anđić, Zoran and Kamberović, Željko",
year = "2023",
abstract = "More than 90 % of lead produced in Europe comes from secondary lead flows, of
which 85 % is attributed to waste lead-acid batteries (LAB). The main technological
approach for LAB processing implies pyrometallurgy by which 100–400 kg of waste slag
(WS) is generated per 1 ton of produced metallic lead. Due to recycling process parameters,
generated WS has great potential for releasing toxic elements contributing to environmental
pollution [1]. Namely, the most common flux in the recycling process is sodium-based
(Na2CO3) when alkali lead waste slag (ALWS) is generated, characterized as hazardous due
to its physical-chemical characteristics: high leachability, hygroscopic and pulverized
nature and, ultimately, instability [2,3]. Therefore, ALWS treatment prior to disposal should
be considered an integral part of waste LAB treatment systems. Immobilization of toxic
elements contained in slag is crucial and can be achieved by stabilization/solidification
processes (S/S) as one of the most widely used technologies in the treatment of heavy metal containing wastes for final disposal or utilization.
In this research, ALWS generated in the waste LAB recycling is used to determine
the S/S process efficiency as a function of the added binder amount (cement, in the range of
5 – 10 %), pre-treatment (the removal of water-soluble compounds), and activator addition
(MgO). The liquid to solid (L/S) ratio was 1/4 in all S/S experiments. The basic parameters
for the effectiveness assessments were compressive strength (UCS) and pollutants leaching
(Method 1311 Toxicity characteristic leaching procedure, TCLP).
The conclusion is that, contrary to the pre-treatment process, the addition of MgO has
an overall positive effect on the S/S process of ALSW, ensuring both mechanical and
chemical stability. This ALWS solidificate, obtained through the S/S process by using MgO
as an activator, is safe for disposal, according to environmental regulations.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023",
title = "Stabilization/solidification process of alkali lead waste slag: influence of pre-treatment and addition of selected additives",
pages = "177-178",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6305"
}

Đokić, J., Štulović, M., Korać, M., Anđić, Z.,& Kamberović, Ž.. (2023). Stabilization/solidification process of alkali lead waste slag: influence of pre-treatment and addition of selected additives. in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023
Belgrade : Serbian Chemical Society., 177-178.
https://hdl.handle.net/21.15107/rcub_cherry_6305

Đokić J, Štulović M, Korać M, Anđić Z, Kamberović Ž. Stabilization/solidification process of alkali lead waste slag: influence of pre-treatment and addition of selected additives. in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023. 2023;:177-178.
https://hdl.handle.net/21.15107/rcub_cherry_6305 .

Đokić, Jovana, Štulović, Marija, Korać, Marija, Anđić, Zoran, Kamberović, Željko, "Stabilization/solidification process of alkali lead waste slag: influence of pre-treatment and addition of selected additives" in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023 (2023):177-178,
https://hdl.handle.net/21.15107/rcub_cherry_6305 .

TY  - CONF
AU  - Sokić, Katarina
AU  - Dikić, Jelena
AU  - Veljović, Đorđe
AU  - Đokić, Jovana
AU  - Anđić, Zoran
AU  - Jevtić, Sanja O.
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6243
AB  - Natural zeolite is a good sorbent for many cations due to its specific porous structure. The degree of sorption efficiency depends on the cation type and the availability of exchange positions in the zeolite lattice. The aim of this work is to
examine the synthesis possibility of a new adsorbent based on natural zeolite and hydroxyapatite. The adsorbent was prepared mechanochemically by using clinoptilolite-rich zeolite tuff from the Slanci deposit (Serbia) and hydroxyapatite
obtained by the hydrothermal process. The milling process was performed in a ball mill and optimized regarding contact time and milling speed. For the synthesis of zeolite/hydroxyapatite adsorbent (ZHAp), optimal values for these two parameters were 10 min and 250 rpm, respectively. The resulting sample ZHAp was characterized by X-ray powder diffraction, thermal analysis and scanning electron microscopy. Diffraction analysis of the ZHAp confirmed the presence of the most abundant mineral in zeolite tuff - clinoptilolite and hydroxyapatite. Needle-like crystals of hydroxyapatite on the clinoptilolite surface are observed in SEM images. Zeolite/hydroxyapatite sample is thermally stable at 800 °C. Adsorption properties of ZHAp were examined for nickel and chromium ions, towards which natural zeolite shows a low affinity. The presence of hydroxyapatite on the zeolite surface led to an increase in the adsorption capacity more than two times for both tested ions compared to the initial zeolite tuff.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe MME SEE Congress 2023, Trebinje, Bosnia and Herzegovina 7-10th June 2023
T1  - Mechanochemical synthesis and characterization of the adsorbents based on natural zeolite and hydroxyapatite
SP  - 395
EP  - 400
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6243
ER  - 

@conference{
author = "Sokić, Katarina and Dikić, Jelena and Veljović, Đorđe and Đokić, Jovana and Anđić, Zoran and Jevtić, Sanja O.",
year = "2023",
abstract = "Natural zeolite is a good sorbent for many cations due to its specific porous structure. The degree of sorption efficiency depends on the cation type and the availability of exchange positions in the zeolite lattice. The aim of this work is to
examine the synthesis possibility of a new adsorbent based on natural zeolite and hydroxyapatite. The adsorbent was prepared mechanochemically by using clinoptilolite-rich zeolite tuff from the Slanci deposit (Serbia) and hydroxyapatite
obtained by the hydrothermal process. The milling process was performed in a ball mill and optimized regarding contact time and milling speed. For the synthesis of zeolite/hydroxyapatite adsorbent (ZHAp), optimal values for these two parameters were 10 min and 250 rpm, respectively. The resulting sample ZHAp was characterized by X-ray powder diffraction, thermal analysis and scanning electron microscopy. Diffraction analysis of the ZHAp confirmed the presence of the most abundant mineral in zeolite tuff - clinoptilolite and hydroxyapatite. Needle-like crystals of hydroxyapatite on the clinoptilolite surface are observed in SEM images. Zeolite/hydroxyapatite sample is thermally stable at 800 °C. Adsorption properties of ZHAp were examined for nickel and chromium ions, towards which natural zeolite shows a low affinity. The presence of hydroxyapatite on the zeolite surface led to an increase in the adsorption capacity more than two times for both tested ions compared to the initial zeolite tuff.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe MME SEE Congress 2023, Trebinje, Bosnia and Herzegovina 7-10th June 2023",
title = "Mechanochemical synthesis and characterization of the adsorbents based on natural zeolite and hydroxyapatite",
pages = "395-400",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6243"
}

Sokić, K., Dikić, J., Veljović, Đ., Đokić, J., Anđić, Z.,& Jevtić, S. O.. (2023). Mechanochemical synthesis and characterization of the adsorbents based on natural zeolite and hydroxyapatite. in 5th Metallurgical & Materials Engineering Congress of South-East Europe MME SEE Congress 2023, Trebinje, Bosnia and Herzegovina 7-10th June 2023
Association of Metallurgical Engineers of Serbia (AMES)., 395-400.
https://hdl.handle.net/21.15107/rcub_cherry_6243

Sokić K, Dikić J, Veljović Đ, Đokić J, Anđić Z, Jevtić SO. Mechanochemical synthesis and characterization of the adsorbents based on natural zeolite and hydroxyapatite. in 5th Metallurgical & Materials Engineering Congress of South-East Europe MME SEE Congress 2023, Trebinje, Bosnia and Herzegovina 7-10th June 2023. 2023;:395-400.
https://hdl.handle.net/21.15107/rcub_cherry_6243 .

Sokić, Katarina, Dikić, Jelena, Veljović, Đorđe, Đokić, Jovana, Anđić, Zoran, Jevtić, Sanja O., "Mechanochemical synthesis and characterization of the adsorbents based on natural zeolite and hydroxyapatite" in 5th Metallurgical & Materials Engineering Congress of South-East Europe MME SEE Congress 2023, Trebinje, Bosnia and Herzegovina 7-10th June 2023 (2023):395-400,
https://hdl.handle.net/21.15107/rcub_cherry_6243 .

TY  - CONF
AU  - Đokić, Jovana
AU  - Gajić, Nataša
AU  - Anđić, Dimitrije Z.
AU  - Kamberović, Željko
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6237
AB  - During the conventional roast–leach–electrolysis (RLE) zinc production process, precipitation of the jarosite-type compounds is widely used to remove iron and other metal impurities from the solution. Above mentioned compounds, with the general formula MFe3(SO4)2(OH)6, (M+=NH4, Na, K, Ag, etc.), in addition to iron, contain a high concentration of Pb, Cd, Cr, As, Zn, In, Ga, Ge as metal oxides and/or sulfates [1]. Consequently, jarosite is considered hazardous yet valuable waste [2]. In addition, every year around 6-7 million tonnes of jarosite waste is generated globally [3]. Due to large waste volumes and its chemical characteristics, jarosite requires a lot of storage space and monitoring. Unfortunately, this type of waste is often landfilled causing serious environmental problems and irreversible metal and value losses. Hence, an urgent solution for both managing and utilization/recycling is required, to face needs regarding ecological demands and circular economy goals.
In this paper, jarosite sludge, as a specific type of hazardous industrial waste, is used to investigate transformation to the targeted compounds through the comprehensive thermodynamic analysis and experimental roasting process tests. The roasting was conducted to transform iron into insoluble hematite (Fe2O3), valuable metals (Zn, Cu, and In) into water-soluble sulfates, and to keep Pb in the form of water-insoluble anglesite (PbSO4). The solid residue obtained after roasting was used in leaching tests to further evaluate the efficiency of the targeted phase transformations.
Theoretical considerations of chemical reactions and phase thermodynamics were performed using the HSC Chemistry v.9.2.3 software [4] to define potential chemical reactions, examine the feasibility of the target transformations, and set the limiting reaction parameters. Further, in the first part of the experimental work, the influence of the roasting process and reaction parameters on the transformation of jarosite sludge phases into target compounds was investigated. This included variations in the reaction time, temperature, and furnace atmosphere influence. The leaching conditions were kept constant (temperature of 25 °C, during 60 min, and solid to liquid ratio of 1/5) to determine the efficiency of phase transformations in the samples obtained by roasting. Changes in the chemical and mineralogical composition and microstructure were analyzed using different analytical methods, including XRD and SEM analysis.
According to the obtained results of the roasting process, it was determined that the phase transformation of jarosite sludge compounds into targeted insoluble hematite and water-soluble sulfates occurs at 730 °C, the time required is 60 min in the air (oxidizing) atmosphere of 1-2 [dm3/h]/kg of the input material, which is in accordance with the results of the theoretical indications. Also, it is experimentally confirmed that the introduction of sulfate into the roasting
 
atmosphere leads to the incomplete transformation of jarosite and the formation of the unwanted Fe2(SO4)3. Leaching results of the sample obtained by the abovementioned optimal roasting conditions show that only 4.5% of Fe is leached while the rest remains as solid targeted hematite. Also, more than 75% of In and more than 90% of other targeted metals (Cu and Zn) are leached, indicating the high efficiency of the roasting process. Phase transformation was confirmed by SEM analysis, showing that hexagonal crystals of jarosite, dominating in the starting material, were completely replaced with the globular microstructure of Fe2O3, in the roasted samples. SEM analysis of the leaching residue also confirmed the absence of the water-soluble sulfates and the presence of the anglesite as water-insoluble sulfate. The phase composition of the samples is confirmed by XRD analysis.
This research shows that the proposed process enables the recycling of jarosite through metal transformation and further utilization. The obtained products can be used in industry, while the metal ions can be selectively separated from the sulfate solution and returned to the production streams. This approach contributes to the utilization of jarosite, as hazardous waste, in order to obtain valuable metals, and generally reduces the negative environmental impact by decreasing the amount of disposed waste and reducing the need for primary exploitation.
PB  - Belgrade : Serbian Chemical Society
C3  - 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023
T1  - Jarosite sludge - utilization and valuable metals recovery applying roasting-leaching process
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6237
ER  - 

@conference{
author = "Đokić, Jovana and Gajić, Nataša and Anđić, Dimitrije Z. and Kamberović, Željko",
year = "2023",
abstract = "During the conventional roast–leach–electrolysis (RLE) zinc production process, precipitation of the jarosite-type compounds is widely used to remove iron and other metal impurities from the solution. Above mentioned compounds, with the general formula MFe3(SO4)2(OH)6, (M+=NH4, Na, K, Ag, etc.), in addition to iron, contain a high concentration of Pb, Cd, Cr, As, Zn, In, Ga, Ge as metal oxides and/or sulfates [1]. Consequently, jarosite is considered hazardous yet valuable waste [2]. In addition, every year around 6-7 million tonnes of jarosite waste is generated globally [3]. Due to large waste volumes and its chemical characteristics, jarosite requires a lot of storage space and monitoring. Unfortunately, this type of waste is often landfilled causing serious environmental problems and irreversible metal and value losses. Hence, an urgent solution for both managing and utilization/recycling is required, to face needs regarding ecological demands and circular economy goals.
In this paper, jarosite sludge, as a specific type of hazardous industrial waste, is used to investigate transformation to the targeted compounds through the comprehensive thermodynamic analysis and experimental roasting process tests. The roasting was conducted to transform iron into insoluble hematite (Fe2O3), valuable metals (Zn, Cu, and In) into water-soluble sulfates, and to keep Pb in the form of water-insoluble anglesite (PbSO4). The solid residue obtained after roasting was used in leaching tests to further evaluate the efficiency of the targeted phase transformations.
Theoretical considerations of chemical reactions and phase thermodynamics were performed using the HSC Chemistry v.9.2.3 software [4] to define potential chemical reactions, examine the feasibility of the target transformations, and set the limiting reaction parameters. Further, in the first part of the experimental work, the influence of the roasting process and reaction parameters on the transformation of jarosite sludge phases into target compounds was investigated. This included variations in the reaction time, temperature, and furnace atmosphere influence. The leaching conditions were kept constant (temperature of 25 °C, during 60 min, and solid to liquid ratio of 1/5) to determine the efficiency of phase transformations in the samples obtained by roasting. Changes in the chemical and mineralogical composition and microstructure were analyzed using different analytical methods, including XRD and SEM analysis.
According to the obtained results of the roasting process, it was determined that the phase transformation of jarosite sludge compounds into targeted insoluble hematite and water-soluble sulfates occurs at 730 °C, the time required is 60 min in the air (oxidizing) atmosphere of 1-2 [dm3/h]/kg of the input material, which is in accordance with the results of the theoretical indications. Also, it is experimentally confirmed that the introduction of sulfate into the roasting
 
atmosphere leads to the incomplete transformation of jarosite and the formation of the unwanted Fe2(SO4)3. Leaching results of the sample obtained by the abovementioned optimal roasting conditions show that only 4.5% of Fe is leached while the rest remains as solid targeted hematite. Also, more than 75% of In and more than 90% of other targeted metals (Cu and Zn) are leached, indicating the high efficiency of the roasting process. Phase transformation was confirmed by SEM analysis, showing that hexagonal crystals of jarosite, dominating in the starting material, were completely replaced with the globular microstructure of Fe2O3, in the roasted samples. SEM analysis of the leaching residue also confirmed the absence of the water-soluble sulfates and the presence of the anglesite as water-insoluble sulfate. The phase composition of the samples is confirmed by XRD analysis.
This research shows that the proposed process enables the recycling of jarosite through metal transformation and further utilization. The obtained products can be used in industry, while the metal ions can be selectively separated from the sulfate solution and returned to the production streams. This approach contributes to the utilization of jarosite, as hazardous waste, in order to obtain valuable metals, and generally reduces the negative environmental impact by decreasing the amount of disposed waste and reducing the need for primary exploitation.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023",
title = "Jarosite sludge - utilization and valuable metals recovery applying roasting-leaching process",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6237"
}

Đokić, J., Gajić, N., Anđić, D. Z.,& Kamberović, Ž.. (2023). Jarosite sludge - utilization and valuable metals recovery applying roasting-leaching process. in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023
Belgrade : Serbian Chemical Society..
https://hdl.handle.net/21.15107/rcub_cherry_6237

Đokić J, Gajić N, Anđić DZ, Kamberović Ž. Jarosite sludge - utilization and valuable metals recovery applying roasting-leaching process. in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023. 2023;.
https://hdl.handle.net/21.15107/rcub_cherry_6237 .

Đokić, Jovana, Gajić, Nataša, Anđić, Dimitrije Z., Kamberović, Željko, "Jarosite sludge - utilization and valuable metals recovery applying roasting-leaching process" in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023 (2023),
https://hdl.handle.net/21.15107/rcub_cherry_6237 .

TY  - CONF
AU  - Đokić, Jovana
AU  - Štulović, Marija
AU  - Korać, Marija
AU  - Anđić, Zoran
AU  - Kamberović, Željko
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6236
AB  - More than 90% of lead produced in Europe comes from secondary lead flows, of which 85% is attributed to waste lead-acid batteries (LAB). The main technological approach for LAB processing implies pyrometallurgy by which 100–400 kg of waste slag (WS) is generated per 1 ton of produced metallic lead. Due to recycling process parameters, generated WS has great potential for releasing toxic elements contributing to environmental pollution [1]. Namely, the most common flux in the recycling process is sodium-based (Na2CO3) when alkali lead waste slag (ALWS) is generated, characterized as hazardous due to its physical-chemical characteristics: high leachability, hygroscopic and pulverized nature and, ultimately, instability [2,3]. Therefore, ALWS treatment prior to disposal should be considered an integral part of waste LAB treatment systems. Immobilization of toxic elements contained in slag is crucial and can be achieved by stabilization/solidification processes (S/S) as one of the most widely used technologies in the treatment of heavy metal-containing wastes for final disposal or utilization.
In this research, ALWS generated in the waste LAB recycling is used to determine the S/S process efficiency as a function of the added binder amount (cement, in the range of 5 – 10 %), pre-treatment (the removal of water-soluble compounds), and activator addition (MgO). The liquid to solid (L/S) ratio was 1/4 in all S/S experiments. The basic parameters for the effectiveness assessments were compressive strength (UCS) and pollutants leaching (Method 1311 Toxicity characteristic leaching procedure, TCLP).
ALWS containing 3.5 Pb, 15.5 Na, 14.0 S, and 24.7 Fe was mixed with cement and water. The results of UCS showed that all produced solidificates exceeded the required value of 0.35 MPa [4], yet the mixture containing 7.5 % of the cement has the best mechanical properties (2.1 MPa). This sample was further analyzed and the TCLP results showed that the Pb concentration exceeds the limit values for stabilized slag (10.4 and 5 ppm, respectively). In the next set, ALWS was pre-treated by continuous rinser (30 ºC, 60 min, L/S 4). Obtained results of UCS (0.4 MPa) and TCLP (53.4 ppm) were unfavorable. The last set, besides the binder, included activator addition (MgO, 7.5 %) altogether with a high content of untreated ALWS (85 %). Analysis of the produced solidificates showed favorable and acceptable results (USC - 3.3 MPa, TCLP – Pb 4.5 ppm). 
Generally, in an alkaline slag-leaching solution lead precipitates as a complex mixture (PbO, Pb(OH)2, PbO×Pb(OH)2). Lead oxides are amphoteric and dissolve in an alkaline aqueous solution, leading to poor solidification. Also, lead present in surface coatings around cement grains prevents cement hydration. Simultaneously, the migration of lead to the surrounding water is promoted. The negative effect of the pre-treatment is a consequence of the sulfate ions absence, as well as the absence of the ettringite (Ca6Al2(SO4)3(OH)12×26H2O) and sulfate- AFm phases [5], which negatively affect the strength of the product. The addition of MgO benefits the S/S process through hydrotalcite-like phase formation ([M1-
2+M 3+(OH) ][A   n-×mH O], M2+=Mg, Zn, Ni, Fe; M3+=Al, Cr, Fe; A=CO 2-,
NO -, Cl-), a compound capable of metal adsorption, hence immobilization [6].
The conclusion is that, contrary to the pre-treatment process, the addition of MgO has an overall positive effect on the S/S process of ALSW, ensuring both mechanical and chemical stability. This ALWS solidificate, obtained through the S/S process by using MgO as an activator, is safe for disposal, according to environmental regulations.
PB  - Belgrade : Serbian Chemical Society
C3  - 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023
T1  - Stabilization/solidification process of alkali lead waste slag: influence of pretreatment and addition of selected additives
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6236
ER  - 

@conference{
author = "Đokić, Jovana and Štulović, Marija and Korać, Marija and Anđić, Zoran and Kamberović, Željko",
year = "2023",
abstract = "More than 90% of lead produced in Europe comes from secondary lead flows, of which 85% is attributed to waste lead-acid batteries (LAB). The main technological approach for LAB processing implies pyrometallurgy by which 100–400 kg of waste slag (WS) is generated per 1 ton of produced metallic lead. Due to recycling process parameters, generated WS has great potential for releasing toxic elements contributing to environmental pollution [1]. Namely, the most common flux in the recycling process is sodium-based (Na2CO3) when alkali lead waste slag (ALWS) is generated, characterized as hazardous due to its physical-chemical characteristics: high leachability, hygroscopic and pulverized nature and, ultimately, instability [2,3]. Therefore, ALWS treatment prior to disposal should be considered an integral part of waste LAB treatment systems. Immobilization of toxic elements contained in slag is crucial and can be achieved by stabilization/solidification processes (S/S) as one of the most widely used technologies in the treatment of heavy metal-containing wastes for final disposal or utilization.
In this research, ALWS generated in the waste LAB recycling is used to determine the S/S process efficiency as a function of the added binder amount (cement, in the range of 5 – 10 %), pre-treatment (the removal of water-soluble compounds), and activator addition (MgO). The liquid to solid (L/S) ratio was 1/4 in all S/S experiments. The basic parameters for the effectiveness assessments were compressive strength (UCS) and pollutants leaching (Method 1311 Toxicity characteristic leaching procedure, TCLP).
ALWS containing 3.5 Pb, 15.5 Na, 14.0 S, and 24.7 Fe was mixed with cement and water. The results of UCS showed that all produced solidificates exceeded the required value of 0.35 MPa [4], yet the mixture containing 7.5 % of the cement has the best mechanical properties (2.1 MPa). This sample was further analyzed and the TCLP results showed that the Pb concentration exceeds the limit values for stabilized slag (10.4 and 5 ppm, respectively). In the next set, ALWS was pre-treated by continuous rinser (30 ºC, 60 min, L/S 4). Obtained results of UCS (0.4 MPa) and TCLP (53.4 ppm) were unfavorable. The last set, besides the binder, included activator addition (MgO, 7.5 %) altogether with a high content of untreated ALWS (85 %). Analysis of the produced solidificates showed favorable and acceptable results (USC - 3.3 MPa, TCLP – Pb 4.5 ppm). 
Generally, in an alkaline slag-leaching solution lead precipitates as a complex mixture (PbO, Pb(OH)2, PbO×Pb(OH)2). Lead oxides are amphoteric and dissolve in an alkaline aqueous solution, leading to poor solidification. Also, lead present in surface coatings around cement grains prevents cement hydration. Simultaneously, the migration of lead to the surrounding water is promoted. The negative effect of the pre-treatment is a consequence of the sulfate ions absence, as well as the absence of the ettringite (Ca6Al2(SO4)3(OH)12×26H2O) and sulfate- AFm phases [5], which negatively affect the strength of the product. The addition of MgO benefits the S/S process through hydrotalcite-like phase formation ([M1-
2+M 3+(OH) ][A   n-×mH O], M2+=Mg, Zn, Ni, Fe; M3+=Al, Cr, Fe; A=CO 2-,
NO -, Cl-), a compound capable of metal adsorption, hence immobilization [6].
The conclusion is that, contrary to the pre-treatment process, the addition of MgO has an overall positive effect on the S/S process of ALSW, ensuring both mechanical and chemical stability. This ALWS solidificate, obtained through the S/S process by using MgO as an activator, is safe for disposal, according to environmental regulations.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023",
title = "Stabilization/solidification process of alkali lead waste slag: influence of pretreatment and addition of selected additives",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6236"
}

Đokić, J., Štulović, M., Korać, M., Anđić, Z.,& Kamberović, Ž.. (2023). Stabilization/solidification process of alkali lead waste slag: influence of pretreatment and addition of selected additives. in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023
Belgrade : Serbian Chemical Society..
https://hdl.handle.net/21.15107/rcub_cherry_6236

Đokić J, Štulović M, Korać M, Anđić Z, Kamberović Ž. Stabilization/solidification process of alkali lead waste slag: influence of pretreatment and addition of selected additives. in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023. 2023;.
https://hdl.handle.net/21.15107/rcub_cherry_6236 .

Đokić, Jovana, Štulović, Marija, Korać, Marija, Anđić, Zoran, Kamberović, Željko, "Stabilization/solidification process of alkali lead waste slag: influence of pretreatment and addition of selected additives" in 9th Symposium Chemistry and Environmental Protection EnviroChem2023 with International Participation, Book of Abstracts, Kladovo, June 4-7, 2023 (2023),
https://hdl.handle.net/21.15107/rcub_cherry_6236 .

TY  - JOUR
AU  - Nikolić, Vesna
AU  - Đokić, Jovana
AU  - Kamberović, Željko
AU  - Marinković, Aleksandar
AU  - Jevtić, Sanja O.
AU  - Anđić, Zoran
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5514
AB  - The aim of this study was to investigate a possibility of synthesis of porous ceramics with controlled open porosity, which could be used as sorbents and catalyst supports. Two organic additives were used to obtain open porosity: polystyrene beads and cellulose fibers, which are mixed with kaolin clay powder and the appropriate water content. Samples were sintered at 1050 oC for 1 h. Characterization of the obtained products included X-ray powder diffraction analysis (XRPD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and elemental CHNS analysis. In addition, porosity was examined by quantification of visual information. The specific surface areas were determined by the Brunauer–Emmett–Teller (BET) method. Also, density and compressive strength of the obtained samples were assessed. It was determined that by sintering, the organic component completely leaves the system. For samples prepared with polystyrene beads and with cellulose fibers, satisfactory mechanical properties were obtained: compressive strengths were 1.42 and 1.56 MPa, respectively. It was noted that significantly higher open porosity was obtained by using polystyrene beads as a sacrificial template (porosity of ̴56 %) instead of cellulose fibers (porosity of ̴6 %).
T2  - Hemijska Industrija
T1  - Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity
VL  - 76
IS  - 2
SP  - 87
EP  - 95
DO  - 10.2298/HEMIND210809005N
ER  - 

@article{
author = "Nikolić, Vesna and Đokić, Jovana and Kamberović, Željko and Marinković, Aleksandar and Jevtić, Sanja O. and Anđić, Zoran",
year = "2022",
abstract = "The aim of this study was to investigate a possibility of synthesis of porous ceramics with controlled open porosity, which could be used as sorbents and catalyst supports. Two organic additives were used to obtain open porosity: polystyrene beads and cellulose fibers, which are mixed with kaolin clay powder and the appropriate water content. Samples were sintered at 1050 oC for 1 h. Characterization of the obtained products included X-ray powder diffraction analysis (XRPD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and elemental CHNS analysis. In addition, porosity was examined by quantification of visual information. The specific surface areas were determined by the Brunauer–Emmett–Teller (BET) method. Also, density and compressive strength of the obtained samples were assessed. It was determined that by sintering, the organic component completely leaves the system. For samples prepared with polystyrene beads and with cellulose fibers, satisfactory mechanical properties were obtained: compressive strengths were 1.42 and 1.56 MPa, respectively. It was noted that significantly higher open porosity was obtained by using polystyrene beads as a sacrificial template (porosity of ̴56 %) instead of cellulose fibers (porosity of ̴6 %).",
journal = "Hemijska Industrija",
title = "Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity",
volume = "76",
number = "2",
pages = "87-95",
doi = "10.2298/HEMIND210809005N"
}

Nikolić, V., Đokić, J., Kamberović, Ž., Marinković, A., Jevtić, S. O.,& Anđić, Z.. (2022). Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity. in Hemijska Industrija, 76(2), 87-95.
https://doi.org/10.2298/HEMIND210809005N

Nikolić V, Đokić J, Kamberović Ž, Marinković A, Jevtić SO, Anđić Z. Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity. in Hemijska Industrija. 2022;76(2):87-95.
doi:10.2298/HEMIND210809005N .

Nikolić, Vesna, Đokić, Jovana, Kamberović, Željko, Marinković, Aleksandar, Jevtić, Sanja O., Anđić, Zoran, "Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity" in Hemijska Industrija, 76, no. 2 (2022):87-95,
https://doi.org/10.2298/HEMIND210809005N . .

TY  - CONF
AU  - Manojlović, Vaso
AU  - Kamberović, Željko
AU  - Jevtić, Sanja O.
AU  - Gajić, Nataša
AU  - Ranitović, Milisav
AU  - Milošević, Anđela
AU  - Đokić, Jovana
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6297
AB  - In the hydrometallurgical process for getting the zine, after acid leaching, zinc-ferric sludge as the byproduct is further treated in the so-called jarosite procedure In the jarosite procedure, Pb and Ag are valorized, and Fe is removed through the residue. Besides Fe, in the jarosite residue, the other impurities are present (2n. Cu Ni, Cr, Co, As, Cd, Pb, 5b, Ge, Ga, In) which could be mobile in the environment causing the hazardous consequences [11]. The main goal of our research is to determine the activation energy of the decomposition of jarosite using thermogravimetry analysis. The thermogravimetric curve (IG) shows three segments, which indicate that the degradation of jarosite occurs in three steps. Below 200 °C, mass loss is 1.1%, due to adsorbed water evaporation. At an interval of 285-440 °C (with DTG maximum at 418 °C) deammonicifiation and dehydroxylation occurred. Also, structural water is released above 390 °C, so that three reactions occur simultaneously in this temperature range - which justifies the high activation energy on a - 0.3 and temperature of 420 °C (Figure b, c). Jarosite decomposed into ferrous sulfate and hematite with a weight loss of 22.6%. The mass loss in the range 520 to 750 °C (DTG maximum at 625 °C) is attributed to the loss of sulfate as $Oz. Two minima (420.1 and 625.9 °C) are observed on the DSC curve, which indicates that the process of jarosite decomposition is endothermic. The Fell could oxidize from intermediate phases, which is favorable to get Fe(ILD) that will later precipitate in the water. For kinetic analysis, we used Kissinger-Akahira Sunose (KAS) integral isoconversional method for the determination of Ea. The energy of activation changes with conversion, a, and the average value is 235.4 kJ/mol - which is higher than the literature 197.7 kJ/mol [2]; this is expected due to the complexity in the chemical composition of industrial jarosite residue.
PB  - Kosovska Mitrovica : Fakultet tehničkih nauka
C3  - Deseti simpozijum o termodinamici i faznim dijagramima
T1  - Isoconversional analysis of jarosite residue thermal decomposition
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6297
ER  - 

@conference{
author = "Manojlović, Vaso and Kamberović, Željko and Jevtić, Sanja O. and Gajić, Nataša and Ranitović, Milisav and Milošević, Anđela and Đokić, Jovana",
year = "2021",
abstract = "In the hydrometallurgical process for getting the zine, after acid leaching, zinc-ferric sludge as the byproduct is further treated in the so-called jarosite procedure In the jarosite procedure, Pb and Ag are valorized, and Fe is removed through the residue. Besides Fe, in the jarosite residue, the other impurities are present (2n. Cu Ni, Cr, Co, As, Cd, Pb, 5b, Ge, Ga, In) which could be mobile in the environment causing the hazardous consequences [11]. The main goal of our research is to determine the activation energy of the decomposition of jarosite using thermogravimetry analysis. The thermogravimetric curve (IG) shows three segments, which indicate that the degradation of jarosite occurs in three steps. Below 200 °C, mass loss is 1.1%, due to adsorbed water evaporation. At an interval of 285-440 °C (with DTG maximum at 418 °C) deammonicifiation and dehydroxylation occurred. Also, structural water is released above 390 °C, so that three reactions occur simultaneously in this temperature range - which justifies the high activation energy on a - 0.3 and temperature of 420 °C (Figure b, c). Jarosite decomposed into ferrous sulfate and hematite with a weight loss of 22.6%. The mass loss in the range 520 to 750 °C (DTG maximum at 625 °C) is attributed to the loss of sulfate as $Oz. Two minima (420.1 and 625.9 °C) are observed on the DSC curve, which indicates that the process of jarosite decomposition is endothermic. The Fell could oxidize from intermediate phases, which is favorable to get Fe(ILD) that will later precipitate in the water. For kinetic analysis, we used Kissinger-Akahira Sunose (KAS) integral isoconversional method for the determination of Ea. The energy of activation changes with conversion, a, and the average value is 235.4 kJ/mol - which is higher than the literature 197.7 kJ/mol [2]; this is expected due to the complexity in the chemical composition of industrial jarosite residue.",
publisher = "Kosovska Mitrovica : Fakultet tehničkih nauka",
journal = "Deseti simpozijum o termodinamici i faznim dijagramima",
title = "Isoconversional analysis of jarosite residue thermal decomposition",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6297"
}

Manojlović, V., Kamberović, Ž., Jevtić, S. O., Gajić, N., Ranitović, M., Milošević, A.,& Đokić, J.. (2021). Isoconversional analysis of jarosite residue thermal decomposition. in Deseti simpozijum o termodinamici i faznim dijagramima
Kosovska Mitrovica : Fakultet tehničkih nauka..
https://hdl.handle.net/21.15107/rcub_cherry_6297

Manojlović V, Kamberović Ž, Jevtić SO, Gajić N, Ranitović M, Milošević A, Đokić J. Isoconversional analysis of jarosite residue thermal decomposition. in Deseti simpozijum o termodinamici i faznim dijagramima. 2021;.
https://hdl.handle.net/21.15107/rcub_cherry_6297 .

Manojlović, Vaso, Kamberović, Željko, Jevtić, Sanja O., Gajić, Nataša, Ranitović, Milisav, Milošević, Anđela, Đokić, Jovana, "Isoconversional analysis of jarosite residue thermal decomposition" in Deseti simpozijum o termodinamici i faznim dijagramima (2021),
https://hdl.handle.net/21.15107/rcub_cherry_6297 .

TY  - CONF
AU  - Gajić, Nataša
AU  - Kamberović, Željko
AU  - Ranitović, Milisav
AU  - Milošević, Anđela
AU  - Manojlović, Vaso
AU  - Jevtić, Sanja O.
AU  - Đokić, Jovana
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6296
AB  - Jarosite waste is classified as hazardous one. It contains toxic elements (Cd, As, Hg) with strong leaching toxicity and metal mobility. Nevertheless, jarosite waste is usually landfilled which have an adverse impact on the environment and human health. In addition, jarosite waste contains significant amounts of the base (Fe, Zn, Pb. Cu), critical (In, Ge, Ga), and precious metals (Au, Ag) which should not be discarded but recovered [1]. This paper presents thermodynamic modelling of roasting of non-standard Pb/Ag Jarosite. This approach enables the determination of optimal process conditions for product formation with required phase composition, and thus valorizations of valuable metals. Thermodynamic data for the detailed analysis of roasting were calculated using HSC Chemistry Software v. 9.9.2.3 [2]. The main objectives were the determination of the temperature effect and ratio of input material vs. sulphating and oxidizing agent on the formation of the required roasting product phase composition. To determine the stability of the roasting product compounds, modelling of the phase stability diagrams was done.
The change of the standard Gibbs free energy (ΔrG°) versus the temperature of analyzed transformation reactions the examined system suggests thermodynamical possibility at a temperature higher than 700 °C. Also, the results of thermodynamic calculations, within the equilibrium composition model, showed that the maximum content of hematite, and metal sulphates (Cu, Pb and Zn), as required product compounds, can be obtained within the temperature range of 700-750 °C. Phase stability modelling confirmed formation of the mentioned phases When logarithmic partial pressure of oxygen and sulphur is - 4.5 bar and -20.0 bar, respectively.
PB  - Kosovska Mitrovica : Fakultet tehničkih nauka
C3  - Deseti simpozijum o termodinamici i faznim dijagramima
T1  - Thermodynamic modelling of the roasting process of the nonstandard Pb/Ag Jarosite
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6296
ER  - 

@conference{
author = "Gajić, Nataša and Kamberović, Željko and Ranitović, Milisav and Milošević, Anđela and Manojlović, Vaso and Jevtić, Sanja O. and Đokić, Jovana",
year = "2021",
abstract = "Jarosite waste is classified as hazardous one. It contains toxic elements (Cd, As, Hg) with strong leaching toxicity and metal mobility. Nevertheless, jarosite waste is usually landfilled which have an adverse impact on the environment and human health. In addition, jarosite waste contains significant amounts of the base (Fe, Zn, Pb. Cu), critical (In, Ge, Ga), and precious metals (Au, Ag) which should not be discarded but recovered [1]. This paper presents thermodynamic modelling of roasting of non-standard Pb/Ag Jarosite. This approach enables the determination of optimal process conditions for product formation with required phase composition, and thus valorizations of valuable metals. Thermodynamic data for the detailed analysis of roasting were calculated using HSC Chemistry Software v. 9.9.2.3 [2]. The main objectives were the determination of the temperature effect and ratio of input material vs. sulphating and oxidizing agent on the formation of the required roasting product phase composition. To determine the stability of the roasting product compounds, modelling of the phase stability diagrams was done.
The change of the standard Gibbs free energy (ΔrG°) versus the temperature of analyzed transformation reactions the examined system suggests thermodynamical possibility at a temperature higher than 700 °C. Also, the results of thermodynamic calculations, within the equilibrium composition model, showed that the maximum content of hematite, and metal sulphates (Cu, Pb and Zn), as required product compounds, can be obtained within the temperature range of 700-750 °C. Phase stability modelling confirmed formation of the mentioned phases When logarithmic partial pressure of oxygen and sulphur is - 4.5 bar and -20.0 bar, respectively.",
publisher = "Kosovska Mitrovica : Fakultet tehničkih nauka",
journal = "Deseti simpozijum o termodinamici i faznim dijagramima",
title = "Thermodynamic modelling of the roasting process of the nonstandard Pb/Ag Jarosite",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6296"
}

Gajić, N., Kamberović, Ž., Ranitović, M., Milošević, A., Manojlović, V., Jevtić, S. O.,& Đokić, J.. (2021). Thermodynamic modelling of the roasting process of the nonstandard Pb/Ag Jarosite. in Deseti simpozijum o termodinamici i faznim dijagramima
Kosovska Mitrovica : Fakultet tehničkih nauka..
https://hdl.handle.net/21.15107/rcub_cherry_6296

Gajić N, Kamberović Ž, Ranitović M, Milošević A, Manojlović V, Jevtić SO, Đokić J. Thermodynamic modelling of the roasting process of the nonstandard Pb/Ag Jarosite. in Deseti simpozijum o termodinamici i faznim dijagramima. 2021;.
https://hdl.handle.net/21.15107/rcub_cherry_6296 .

Gajić, Nataša, Kamberović, Željko, Ranitović, Milisav, Milošević, Anđela, Manojlović, Vaso, Jevtić, Sanja O., Đokić, Jovana, "Thermodynamic modelling of the roasting process of the nonstandard Pb/Ag Jarosite" in Deseti simpozijum o termodinamici i faznim dijagramima (2021),
https://hdl.handle.net/21.15107/rcub_cherry_6296 .

TY  - CONF
AU  - Balšić, Violeta
AU  - Đokić, Jovana
AU  - Anđić, Zoran
AU  - Jevtić, Sanja
AU  - Kamberović, Željko
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5715
AB  - Baterije su jedan od najčešće korišćenih izvora energije. Međutim, nakon
upotrebe, one predstavljaju ekološki problem. Kao rešenje, nameće se reciklaža kojom
iskorišćene baterije postaju sekundarni izvori korisnih metala što njihovu proizvodnju
čini ekonomski značajno isplativijom. Da bi se postupak reciklaže prilagodio očuvanju
životne sredine neophodno je pronalaženje ekološki prihvatljivih i efikasnih postupaka.
Kao moguće rešenje nameće se postupak kojim bi se, nakon vakuum pirolize baterija,
korisni metali vezali na odgovarajući adsorbent te ponovo iskoristili. Kao adsorbenti
ispitani su alumosilikatni minerali: lako dostupan i ekonomski isplativ prirodni zeolit
ležišta Zlatokop, Vranjska Banja, i sintetički zeolit A, dobijen laboratorijskom sintezom
iz otpadnog letećeg pepela deponije termoelektrane Morava, Svilajnac. Rendgenskom
difrakcijom praha potvrđeno je da sintetisani uzorak pripada strukturnom tipu LTA,
odnosno zeolitu A, kao i da u zeolitnom tufu dominira klinoptilolit, najzastupljeniji
prirodni zeolit. Ispitivanjem termičkih svojstava pokazno je da su oba zeolita stabilna do
800 °C. Efikasnost adsorpcije ispitana je iz višekomponetnog kondenzata u kome su bili
prisutni joni Cd(II), Pb(II) i Hg(II). Dobijeni rezultati pokazali su da prirodni zeolit ima
najveći afinitet prema kadmijumu (98%), zatim prema olovu (65%) i živi (45%). Jedino
u slučaju žive brzina mešanja pozitivno utiče na stepen adsorpcije. Zeolit A pokazao je
maksimalnu efikasnost (100%) u odnosu na olovo(II) i kadmijum(II), dok živu(II) nije
vezao što bi se moglo pripisati kompeticiji prisutnih jona u rastvoru, manjoj specifičnoj
površini, kao i manjem kapacitetu katjonske izmene u poređenju sa prirodnim zeolitom.
Podaci dobijeni ispitivanjem kinetike adsorpcije pokazali su da se maksimalna efikasnost
ostvaruje za vrlo kratko vreme korišćenjem kako prirodnog, tako i zeolita dobijenog iz otapadnih sirovina čime je moguće valorizovati korisne metale iz istrošenih baterija i na
taj način produžiti njihov vek trajanja.
PB  - Novi Sad : Faculty of Technical Sciences
C3  - First Scientific Conference with International Participation, Circular economy and environmental labelling - CEEL 2021, Novi Sad, 29th January 2021
T1  - Adsorpcija korisnih metala iz kondenzata dobijenog vakuum pirolizom baterija na alumosilikatnim mineralima
SP  - 8
EP  - 9
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5715
ER  - 

@conference{
author = "Balšić, Violeta and Đokić, Jovana and Anđić, Zoran and Jevtić, Sanja and Kamberović, Željko",
year = "2021",
abstract = "Baterije su jedan od najčešće korišćenih izvora energije. Međutim, nakon
upotrebe, one predstavljaju ekološki problem. Kao rešenje, nameće se reciklaža kojom
iskorišćene baterije postaju sekundarni izvori korisnih metala što njihovu proizvodnju
čini ekonomski značajno isplativijom. Da bi se postupak reciklaže prilagodio očuvanju
životne sredine neophodno je pronalaženje ekološki prihvatljivih i efikasnih postupaka.
Kao moguće rešenje nameće se postupak kojim bi se, nakon vakuum pirolize baterija,
korisni metali vezali na odgovarajući adsorbent te ponovo iskoristili. Kao adsorbenti
ispitani su alumosilikatni minerali: lako dostupan i ekonomski isplativ prirodni zeolit
ležišta Zlatokop, Vranjska Banja, i sintetički zeolit A, dobijen laboratorijskom sintezom
iz otpadnog letećeg pepela deponije termoelektrane Morava, Svilajnac. Rendgenskom
difrakcijom praha potvrđeno je da sintetisani uzorak pripada strukturnom tipu LTA,
odnosno zeolitu A, kao i da u zeolitnom tufu dominira klinoptilolit, najzastupljeniji
prirodni zeolit. Ispitivanjem termičkih svojstava pokazno je da su oba zeolita stabilna do
800 °C. Efikasnost adsorpcije ispitana je iz višekomponetnog kondenzata u kome su bili
prisutni joni Cd(II), Pb(II) i Hg(II). Dobijeni rezultati pokazali su da prirodni zeolit ima
najveći afinitet prema kadmijumu (98%), zatim prema olovu (65%) i živi (45%). Jedino
u slučaju žive brzina mešanja pozitivno utiče na stepen adsorpcije. Zeolit A pokazao je
maksimalnu efikasnost (100%) u odnosu na olovo(II) i kadmijum(II), dok živu(II) nije
vezao što bi se moglo pripisati kompeticiji prisutnih jona u rastvoru, manjoj specifičnoj
površini, kao i manjem kapacitetu katjonske izmene u poređenju sa prirodnim zeolitom.
Podaci dobijeni ispitivanjem kinetike adsorpcije pokazali su da se maksimalna efikasnost
ostvaruje za vrlo kratko vreme korišćenjem kako prirodnog, tako i zeolita dobijenog iz otapadnih sirovina čime je moguće valorizovati korisne metale iz istrošenih baterija i na
taj način produžiti njihov vek trajanja.",
publisher = "Novi Sad : Faculty of Technical Sciences",
journal = "First Scientific Conference with International Participation, Circular economy and environmental labelling - CEEL 2021, Novi Sad, 29th January 2021",
title = "Adsorpcija korisnih metala iz kondenzata dobijenog vakuum pirolizom baterija na alumosilikatnim mineralima",
pages = "8-9",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5715"
}

Balšić, V., Đokić, J., Anđić, Z., Jevtić, S.,& Kamberović, Ž.. (2021). Adsorpcija korisnih metala iz kondenzata dobijenog vakuum pirolizom baterija na alumosilikatnim mineralima. in First Scientific Conference with International Participation, Circular economy and environmental labelling - CEEL 2021, Novi Sad, 29th January 2021
Novi Sad : Faculty of Technical Sciences., 8-9.
https://hdl.handle.net/21.15107/rcub_cherry_5715

Balšić V, Đokić J, Anđić Z, Jevtić S, Kamberović Ž. Adsorpcija korisnih metala iz kondenzata dobijenog vakuum pirolizom baterija na alumosilikatnim mineralima. in First Scientific Conference with International Participation, Circular economy and environmental labelling - CEEL 2021, Novi Sad, 29th January 2021. 2021;:8-9.
https://hdl.handle.net/21.15107/rcub_cherry_5715 .

Balšić, Violeta, Đokić, Jovana, Anđić, Zoran, Jevtić, Sanja, Kamberović, Željko, "Adsorpcija korisnih metala iz kondenzata dobijenog vakuum pirolizom baterija na alumosilikatnim mineralima" in First Scientific Conference with International Participation, Circular economy and environmental labelling - CEEL 2021, Novi Sad, 29th January 2021 (2021):8-9,
https://hdl.handle.net/21.15107/rcub_cherry_5715 .

TY  - CONF
AU  - Milošević, Anđela
AU  - Kamberović, Željko
AU  - Manojlović, Vaso
AU  - Đokić, Jovana
AU  - Gajić, Nataša
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5367
AB  - Given the constant development of the high-tech industry, consumer-oriented societies, and reduced electronic equipment's lifespan, the outcome of growth and accumulation of waste is inevitable. Yet, specific electronic equipment components, such as central processing unit (CPU), are carriers of valuable metals, primarily precious, so waste electronic equipment become of recyclable interest. However, inadequate technological processing, particularly in the informal recycling sectors, leads to valuable metals losses. This approach has a negative economic and environmental impact: valuable material is usually considered as waste and landfilled with metals trapped in it, while due to increasing demand, metals are being exploited from natural resources.
In this sense, there is an unquestionable need for an innovative recycling approach and adequate waste management that would lead to i) the decrease of natural exploitation, ii) the removal of waste accumulated in the environment, and iii) better utilization of material flows.
The aim of this paper is an evaluation of the potential of waste CPU acid leaching residue as secondary material and the proposal of the innovative design of an adequate technological process for CPU recycling and recovery of valuable metals while minimizing their loss. The first part of the study included the characterization of the CPU acid leaching residue. Results of the research point out that precious metals content is significant, and material could be further exploited as secondary raw material. However, further optimization of process parameters is needed to achieve the most efficient valorization. A conceptual proposal of the technological scheme for metal recovery is given in the second part, considering two approaches: hydro- and pyrometallurgical methods.
An innovative approach for recycling and waste management can contribute to the ultimate goal nowadays globally set as an imperative: achieving a circular economy through improved material flows management.
PB  - Novi Sad : Faculty of Technical Sciences
C3  - First Scientific Conference with International Participation, Circular Economy and Environmental Labelling, CEEL 2021, Book of Abstracts, Novi Sad, 29th January 2021
T1  - Characterization of waste computers processors and proposal of the metals valorization process
SP  - 5
EP  - 6
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5367
ER  - 

@conference{
author = "Milošević, Anđela and Kamberović, Željko and Manojlović, Vaso and Đokić, Jovana and Gajić, Nataša",
year = "2021",
abstract = "Given the constant development of the high-tech industry, consumer-oriented societies, and reduced electronic equipment's lifespan, the outcome of growth and accumulation of waste is inevitable. Yet, specific electronic equipment components, such as central processing unit (CPU), are carriers of valuable metals, primarily precious, so waste electronic equipment become of recyclable interest. However, inadequate technological processing, particularly in the informal recycling sectors, leads to valuable metals losses. This approach has a negative economic and environmental impact: valuable material is usually considered as waste and landfilled with metals trapped in it, while due to increasing demand, metals are being exploited from natural resources.
In this sense, there is an unquestionable need for an innovative recycling approach and adequate waste management that would lead to i) the decrease of natural exploitation, ii) the removal of waste accumulated in the environment, and iii) better utilization of material flows.
The aim of this paper is an evaluation of the potential of waste CPU acid leaching residue as secondary material and the proposal of the innovative design of an adequate technological process for CPU recycling and recovery of valuable metals while minimizing their loss. The first part of the study included the characterization of the CPU acid leaching residue. Results of the research point out that precious metals content is significant, and material could be further exploited as secondary raw material. However, further optimization of process parameters is needed to achieve the most efficient valorization. A conceptual proposal of the technological scheme for metal recovery is given in the second part, considering two approaches: hydro- and pyrometallurgical methods.
An innovative approach for recycling and waste management can contribute to the ultimate goal nowadays globally set as an imperative: achieving a circular economy through improved material flows management.",
publisher = "Novi Sad : Faculty of Technical Sciences",
journal = "First Scientific Conference with International Participation, Circular Economy and Environmental Labelling, CEEL 2021, Book of Abstracts, Novi Sad, 29th January 2021",
title = "Characterization of waste computers processors and proposal of the metals valorization process",
pages = "5-6",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5367"
}

Milošević, A., Kamberović, Ž., Manojlović, V., Đokić, J.,& Gajić, N.. (2021). Characterization of waste computers processors and proposal of the metals valorization process. in First Scientific Conference with International Participation, Circular Economy and Environmental Labelling, CEEL 2021, Book of Abstracts, Novi Sad, 29th January 2021
Novi Sad : Faculty of Technical Sciences., 5-6.
https://hdl.handle.net/21.15107/rcub_cherry_5367

Milošević A, Kamberović Ž, Manojlović V, Đokić J, Gajić N. Characterization of waste computers processors and proposal of the metals valorization process. in First Scientific Conference with International Participation, Circular Economy and Environmental Labelling, CEEL 2021, Book of Abstracts, Novi Sad, 29th January 2021. 2021;:5-6.
https://hdl.handle.net/21.15107/rcub_cherry_5367 .

Milošević, Anđela, Kamberović, Željko, Manojlović, Vaso, Đokić, Jovana, Gajić, Nataša, "Characterization of waste computers processors and proposal of the metals valorization process" in First Scientific Conference with International Participation, Circular Economy and Environmental Labelling, CEEL 2021, Book of Abstracts, Novi Sad, 29th January 2021 (2021):5-6,
https://hdl.handle.net/21.15107/rcub_cherry_5367 .

TY  - JOUR
AU  - Đokić, Jovana
AU  - Radovanović, Dragana
AU  - Nikolovski, Zlatko
AU  - Anđić, Zoran
AU  - Kamberović, Željko
PY  - 2021
UR  - https://www.mdpi.com/2075-4701/11/9/1383
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4666
AB  - In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, feed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste.
T2  - Metals
T1  - Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery
VL  - 11
IS  - 9
SP  - 1383
DO  - 10.3390/met11091383
ER  - 

@article{
author = "Đokić, Jovana and Radovanović, Dragana and Nikolovski, Zlatko and Anđić, Zoran and Kamberović, Željko",
year = "2021",
abstract = "In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, feed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste.",
journal = "Metals",
title = "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery",
volume = "11",
number = "9",
pages = "1383",
doi = "10.3390/met11091383"
}

Đokić, J., Radovanović, D., Nikolovski, Z., Anđić, Z.,& Kamberović, Ž.. (2021). Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals, 11(9), 1383.
https://doi.org/10.3390/met11091383

Đokić J, Radovanović D, Nikolovski Z, Anđić Z, Kamberović Ž. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals. 2021;11(9):1383.
doi:10.3390/met11091383 .

Đokić, Jovana, Radovanović, Dragana, Nikolovski, Zlatko, Anđić, Zoran, Kamberović, Željko, "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery" in Metals, 11, no. 9 (2021):1383,
https://doi.org/10.3390/met11091383 . .

TY  - JOUR
AU  - Đokić, Jovana
AU  - Jovančićević, Branimir
AU  - Brčeski, Ilija
AU  - Ranitović, Milisav
AU  - Gajić, Nataša
AU  - Kamberović, Željko
PY  - 2020
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4276
AB  - Anode slime and tin precipitate as by-products of the electrorefining (ER) of non-standard anodes obtained after experimental smelting of waste electric and electronic equipment (e-waste), in addition to the base and precious metals, contains a significant amount of tin. Due to its presence as inert SnO2 hydrate (β metastannic acid) and its dissipation between slime and electrolyte, anode slime processing and metals valorization are difficult. This study aimed to investigate conditions under which efficient leaching of metastannic acid could be achieved to facilitate further metals valorization, especially precious metals. The investigation was performed using the by-products obtained from the ER of the non-standard Cu anodes produced by pyrometallurgical processing of e-waste. After detailed characterization of obtained products, the influence of various process parameters like temperature, acid concentration, leaching time, as well as the influence of reducing agent, sulfur compounds, and SnO2 hydration rate on leaching efficiency was investigated. It was found that efficiency of 99% can be achieved by leaching the desulfurized tin precipitate sample in 6 M HCl at 90 °C for 90 min with the addition of Mg powder. The application of the tin removal process, described in this paper, contributes to efficient material flow management.
PB  - Springer
T2  - Journal of Material Cycles and Waste Management
T1  - Leaching of metastannic acid from e-waste by-products
VL  - 22
IS  - 6
SP  - 1899
EP  - 1912
DO  - 10.1007/s10163-020-01076-5
ER  - 

@article{
author = "Đokić, Jovana and Jovančićević, Branimir and Brčeski, Ilija and Ranitović, Milisav and Gajić, Nataša and Kamberović, Željko",
year = "2020",
abstract = "Anode slime and tin precipitate as by-products of the electrorefining (ER) of non-standard anodes obtained after experimental smelting of waste electric and electronic equipment (e-waste), in addition to the base and precious metals, contains a significant amount of tin. Due to its presence as inert SnO2 hydrate (β metastannic acid) and its dissipation between slime and electrolyte, anode slime processing and metals valorization are difficult. This study aimed to investigate conditions under which efficient leaching of metastannic acid could be achieved to facilitate further metals valorization, especially precious metals. The investigation was performed using the by-products obtained from the ER of the non-standard Cu anodes produced by pyrometallurgical processing of e-waste. After detailed characterization of obtained products, the influence of various process parameters like temperature, acid concentration, leaching time, as well as the influence of reducing agent, sulfur compounds, and SnO2 hydration rate on leaching efficiency was investigated. It was found that efficiency of 99% can be achieved by leaching the desulfurized tin precipitate sample in 6 M HCl at 90 °C for 90 min with the addition of Mg powder. The application of the tin removal process, described in this paper, contributes to efficient material flow management.",
publisher = "Springer",
journal = "Journal of Material Cycles and Waste Management",
title = "Leaching of metastannic acid from e-waste by-products",
volume = "22",
number = "6",
pages = "1899-1912",
doi = "10.1007/s10163-020-01076-5"
}

Đokić, J., Jovančićević, B., Brčeski, I., Ranitović, M., Gajić, N.,& Kamberović, Ž.. (2020). Leaching of metastannic acid from e-waste by-products. in Journal of Material Cycles and Waste Management
Springer., 22(6), 1899-1912.
https://doi.org/10.1007/s10163-020-01076-5

Đokić J, Jovančićević B, Brčeski I, Ranitović M, Gajić N, Kamberović Ž. Leaching of metastannic acid from e-waste by-products. in Journal of Material Cycles and Waste Management. 2020;22(6):1899-1912.
doi:10.1007/s10163-020-01076-5 .

Đokić, Jovana, Jovančićević, Branimir, Brčeski, Ilija, Ranitović, Milisav, Gajić, Nataša, Kamberović, Željko, "Leaching of metastannic acid from e-waste by-products" in Journal of Material Cycles and Waste Management, 22, no. 6 (2020):1899-1912,
https://doi.org/10.1007/s10163-020-01076-5 . .

TY  - CONF
AU  - Kamberović, Željko
AU  - Ranitović, Milisav
AU  - Korać, Marija
AU  - Đokić, Jovana
AU  - Gajić, Nataša
AU  - Jovanović, Nikola
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5365
AB  - Materials scarcity and supply risks have become significant issues. Accordingly, high efficient material valorization from secondary sources has emerged as a response to the resource pressures and demand for more sustainable production models. Among others, waste electrical and electronic equipment (WEEE) represent a secondary material which contains a significant amount of critical materials. However, considering the established industrial practice which is mostly focused on the recovery of Cu and Au, this waste is not processed correctly, which eventually hinders its true potentials. A range of techniques and operations are currently applied for materials recovery from WEEE. The essential features of these systems generally follow the scheme of independent pre-processing (disassembly, size reduction, separation) and end-processing (reductive smelting, pyro-hydro-electro refining) operations. However, in this way, both functional and sustainable recovery of materials is not implemented correctly, which leads to lower recoveries and losses of the metal values. Additionally,
due to the high material diversity, different elements, with different metallurgical properties and in different concentrations are introduced, why process control is much more difficult. Therefore, the development of the highly efficient process for selective metals recovery is crucial for overall improvements. 
This paper presents experimental results for selective metals recovery from 
WEEE combining the different pyro-hydrometallurgical operations. Experimental results showed that due to the complex metallurgical reactions, pure pyrometallurgical treatment leads to the distribution of metals in melting products, deviating from the theoretical and expected. However, these results led to a more comprehensive understanding of the reaction systems and contributed to an optimized design of processing operations. This will allow recycling companies to become competitive in the regional market and beyond, which is particularly essential for small and medium enterprises with lower operating capacities.
Successful implementation of the developed state-of-art technological process, guarantee a more efficient approach to recycling processes, production of new materials which supports the concepts of sustainable development and circular economy.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - MME SEE 2019 Metallurgical & Materials Engineering Congress of South-East Europe, Book of Abstracts, June 5 - 7, 2019 Belgrade, Serbia
T1  - Integrated recycling of the critical raw materials from waste electronics
SP  - 37
EP  - 37
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5365
ER  - 

@conference{
author = "Kamberović, Željko and Ranitović, Milisav and Korać, Marija and Đokić, Jovana and Gajić, Nataša and Jovanović, Nikola",
year = "2019",
abstract = "Materials scarcity and supply risks have become significant issues. Accordingly, high efficient material valorization from secondary sources has emerged as a response to the resource pressures and demand for more sustainable production models. Among others, waste electrical and electronic equipment (WEEE) represent a secondary material which contains a significant amount of critical materials. However, considering the established industrial practice which is mostly focused on the recovery of Cu and Au, this waste is not processed correctly, which eventually hinders its true potentials. A range of techniques and operations are currently applied for materials recovery from WEEE. The essential features of these systems generally follow the scheme of independent pre-processing (disassembly, size reduction, separation) and end-processing (reductive smelting, pyro-hydro-electro refining) operations. However, in this way, both functional and sustainable recovery of materials is not implemented correctly, which leads to lower recoveries and losses of the metal values. Additionally,
due to the high material diversity, different elements, with different metallurgical properties and in different concentrations are introduced, why process control is much more difficult. Therefore, the development of the highly efficient process for selective metals recovery is crucial for overall improvements. 
This paper presents experimental results for selective metals recovery from 
WEEE combining the different pyro-hydrometallurgical operations. Experimental results showed that due to the complex metallurgical reactions, pure pyrometallurgical treatment leads to the distribution of metals in melting products, deviating from the theoretical and expected. However, these results led to a more comprehensive understanding of the reaction systems and contributed to an optimized design of processing operations. This will allow recycling companies to become competitive in the regional market and beyond, which is particularly essential for small and medium enterprises with lower operating capacities.
Successful implementation of the developed state-of-art technological process, guarantee a more efficient approach to recycling processes, production of new materials which supports the concepts of sustainable development and circular economy.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "MME SEE 2019 Metallurgical & Materials Engineering Congress of South-East Europe, Book of Abstracts, June 5 - 7, 2019 Belgrade, Serbia",
title = "Integrated recycling of the critical raw materials from waste electronics",
pages = "37-37",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5365"
}

Kamberović, Ž., Ranitović, M., Korać, M., Đokić, J., Gajić, N.,& Jovanović, N.. (2019). Integrated recycling of the critical raw materials from waste electronics. in MME SEE 2019 Metallurgical & Materials Engineering Congress of South-East Europe, Book of Abstracts, June 5 - 7, 2019 Belgrade, Serbia
Association of Metallurgical Engineers of Serbia (AMES)., 37-37.
https://hdl.handle.net/21.15107/rcub_cherry_5365

Kamberović Ž, Ranitović M, Korać M, Đokić J, Gajić N, Jovanović N. Integrated recycling of the critical raw materials from waste electronics. in MME SEE 2019 Metallurgical & Materials Engineering Congress of South-East Europe, Book of Abstracts, June 5 - 7, 2019 Belgrade, Serbia. 2019;:37-37.
https://hdl.handle.net/21.15107/rcub_cherry_5365 .

Kamberović, Željko, Ranitović, Milisav, Korać, Marija, Đokić, Jovana, Gajić, Nataša, Jovanović, Nikola, "Integrated recycling of the critical raw materials from waste electronics" in MME SEE 2019 Metallurgical & Materials Engineering Congress of South-East Europe, Book of Abstracts, June 5 - 7, 2019 Belgrade, Serbia (2019):37-37,
https://hdl.handle.net/21.15107/rcub_cherry_5365 .

TY  - CONF
AU  - Mandić, Maja
AU  - Đokić, Jovana
AU  - Gajić, Nataša
AU  - Uljarević, Jelena
AU  - Kamberović, Željko
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5366
AB  - The rising criticality of technologically inevitably metals and the continuous growth of the waste electronics promote a scientific need for development of innovative recycling process, both efficient and selective. Experimental results showed primarily that by pyrometallurgical treatment it is difficult to achieve selectivity, and secondary that the distribution of metals in melting products is too complicated, deviating from the experiential and expected. Therefore, application of an integral pyro - hydrometallurgical treatment is suggested for improved raw materials efficiency. Successful implementation of the developed state-of-art technological process, guarantee more efficient approach to recycling processes, production of new materials which supports the concepts of sustainable development and cleaner production. Proposed technological solution is applicable in industry with relatively low investments compared to expected revenues, allowing companies to become competitive in the regional market and beyond, which is particularly important for small and medium enterprises with lower operating capacities. Techno-economic justification and integral pyro - hydrometallurgical process for waste electronics recycling is presented. This paper explains measures for the further development of the recycling industry as a part of circular economy strategy in Serbia.
C3  - YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade
T1  - Production of technology metals from waste electronics
SP  - 42
EP  - 42
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5366
ER  - 

@conference{
author = "Mandić, Maja and Đokić, Jovana and Gajić, Nataša and Uljarević, Jelena and Kamberović, Željko",
year = "2019",
abstract = "The rising criticality of technologically inevitably metals and the continuous growth of the waste electronics promote a scientific need for development of innovative recycling process, both efficient and selective. Experimental results showed primarily that by pyrometallurgical treatment it is difficult to achieve selectivity, and secondary that the distribution of metals in melting products is too complicated, deviating from the experiential and expected. Therefore, application of an integral pyro - hydrometallurgical treatment is suggested for improved raw materials efficiency. Successful implementation of the developed state-of-art technological process, guarantee more efficient approach to recycling processes, production of new materials which supports the concepts of sustainable development and cleaner production. Proposed technological solution is applicable in industry with relatively low investments compared to expected revenues, allowing companies to become competitive in the regional market and beyond, which is particularly important for small and medium enterprises with lower operating capacities. Techno-economic justification and integral pyro - hydrometallurgical process for waste electronics recycling is presented. This paper explains measures for the further development of the recycling industry as a part of circular economy strategy in Serbia.",
journal = "YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade",
title = "Production of technology metals from waste electronics",
pages = "42-42",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5366"
}

Mandić, M., Đokić, J., Gajić, N., Uljarević, J.,& Kamberović, Ž.. (2019). Production of technology metals from waste electronics. in YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade, 42-42.
https://hdl.handle.net/21.15107/rcub_cherry_5366

Mandić M, Đokić J, Gajić N, Uljarević J, Kamberović Ž. Production of technology metals from waste electronics. in YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade. 2019;:42-42.
https://hdl.handle.net/21.15107/rcub_cherry_5366 .

Mandić, Maja, Đokić, Jovana, Gajić, Nataša, Uljarević, Jelena, Kamberović, Željko, "Production of technology metals from waste electronics" in YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade (2019):42-42,
https://hdl.handle.net/21.15107/rcub_cherry_5366 .

TY  - CONF
AU  - Mandić, Jovana
AU  - Đokić, Jovana
AU  - Gajić, Nataša
AU  - Kamberović, Željko
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5364
AB  - In this paper thermodynamic modeling of sulfidation of non-standard Pb/Ag - Jarosite is shown, in order to propose optimal technological process for valuable metals recovery. Given the current state of natural resources, demand and consumption, sustainable production of critical metals, especially technological metals, is focus of this research. Neutral leaching residue, Pb/Ag - Jarosite, as a primary zinc production by-product is usually disposed at landfills, despite the fact that contains recyclable base (Zn, Pb, Cu), precious (Ag) and technological, critical metals (In, Ge, Ga). Thermodynamic data for detailed sulfidation behavior of technological metals contained in Pb/Ag - Jarosite were calculated using HSC Chemistry Software v. 9.0 in order to recommend optimal recycling process conditions. The main objectives were determination of temperature effect, input material/sulfidation agent ratio and modeling of phase stability diagrams of chosen technological metal sulfides. Synergetic metallurgy activities including utilization of primary and secondary raw materials can be result of this process modeling.
C3  - YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade
T1  - Thermodinamic modelling of Pb/Ag Jarosite sulfidation for valuable metals recovery
SP  - 41
EP  - 41
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5364
ER  - 

@conference{
author = "Mandić, Jovana and Đokić, Jovana and Gajić, Nataša and Kamberović, Željko",
year = "2019",
abstract = "In this paper thermodynamic modeling of sulfidation of non-standard Pb/Ag - Jarosite is shown, in order to propose optimal technological process for valuable metals recovery. Given the current state of natural resources, demand and consumption, sustainable production of critical metals, especially technological metals, is focus of this research. Neutral leaching residue, Pb/Ag - Jarosite, as a primary zinc production by-product is usually disposed at landfills, despite the fact that contains recyclable base (Zn, Pb, Cu), precious (Ag) and technological, critical metals (In, Ge, Ga). Thermodynamic data for detailed sulfidation behavior of technological metals contained in Pb/Ag - Jarosite were calculated using HSC Chemistry Software v. 9.0 in order to recommend optimal recycling process conditions. The main objectives were determination of temperature effect, input material/sulfidation agent ratio and modeling of phase stability diagrams of chosen technological metal sulfides. Synergetic metallurgy activities including utilization of primary and secondary raw materials can be result of this process modeling.",
journal = "YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade",
title = "Thermodinamic modelling of Pb/Ag Jarosite sulfidation for valuable metals recovery",
pages = "41-41",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5364"
}

Mandić, J., Đokić, J., Gajić, N.,& Kamberović, Ž.. (2019). Thermodinamic modelling of Pb/Ag Jarosite sulfidation for valuable metals recovery. in YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade, 41-41.
https://hdl.handle.net/21.15107/rcub_cherry_5364

Mandić J, Đokić J, Gajić N, Kamberović Ž. Thermodinamic modelling of Pb/Ag Jarosite sulfidation for valuable metals recovery. in YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade. 2019;:41-41.
https://hdl.handle.net/21.15107/rcub_cherry_5364 .

Mandić, Jovana, Đokić, Jovana, Gajić, Nataša, Kamberović, Željko, "Thermodinamic modelling of Pb/Ag Jarosite sulfidation for valuable metals recovery" in YOURS 2019 YOUng ResearcherS Conference, 26-27 March 2019, Belgrade (2019):41-41,
https://hdl.handle.net/21.15107/rcub_cherry_5364 .

TY  - CONF
AU  - Đokić, Jovana
AU  - Ranitović, Milisav
AU  - Zarić, Anja
AU  - Kamberović, Željko
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5329
AB  - Waste electrical and electronic equipment (e-waste) continuously growing and represent an on-going environmental problem. At the same time, as the material composition is changing following high-tech industry development, the complexity of e-waste makes its processing difficult. The inability of the industrial sector to adequately respond, leads to irreversible losses of valuable materials contained in e-waste, particularly in waste printed circuit boards (PCBs). Over the years, different processing approaches including a combination of mechanical pre-processing conducted to reduce particle size and separate metallic from non-metallic fraction, and pyro-, hydro-, electro-, biometallurgical end-processing methods are applied. However, dust obtained during the mechanical pre-processing stage, apart from glass fibres and polymers, contains a significant amount of valuable metals. Technological methods for recycling are in constant development aiming to minimize waste and negative environmental impact. The aim of this paper is the proposal of methodology for utilisation of dust obtained after mechanically treated e-waste. Through detailed physical-chemical characterisation, pyro-hydrometallurgical processing and determination of energy potential, the results of this study can enable further technological process development. Valorisation of e-waste ultimately leads to material efficiency and enables accomplishment of circular economy demands.
T1  - Dust from e-waste mechanical treatment as a valuable material
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5329
ER  - 

@conference{
author = "Đokić, Jovana and Ranitović, Milisav and Zarić, Anja and Kamberović, Željko",
year = "2019",
abstract = "Waste electrical and electronic equipment (e-waste) continuously growing and represent an on-going environmental problem. At the same time, as the material composition is changing following high-tech industry development, the complexity of e-waste makes its processing difficult. The inability of the industrial sector to adequately respond, leads to irreversible losses of valuable materials contained in e-waste, particularly in waste printed circuit boards (PCBs). Over the years, different processing approaches including a combination of mechanical pre-processing conducted to reduce particle size and separate metallic from non-metallic fraction, and pyro-, hydro-, electro-, biometallurgical end-processing methods are applied. However, dust obtained during the mechanical pre-processing stage, apart from glass fibres and polymers, contains a significant amount of valuable metals. Technological methods for recycling are in constant development aiming to minimize waste and negative environmental impact. The aim of this paper is the proposal of methodology for utilisation of dust obtained after mechanically treated e-waste. Through detailed physical-chemical characterisation, pyro-hydrometallurgical processing and determination of energy potential, the results of this study can enable further technological process development. Valorisation of e-waste ultimately leads to material efficiency and enables accomplishment of circular economy demands.",
title = "Dust from e-waste mechanical treatment as a valuable material",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5329"
}

Đokić, J., Ranitović, M., Zarić, A.,& Kamberović, Ž.. (2019). Dust from e-waste mechanical treatment as a valuable material. .
https://hdl.handle.net/21.15107/rcub_cherry_5329

Đokić J, Ranitović M, Zarić A, Kamberović Ž. Dust from e-waste mechanical treatment as a valuable material. 2019;.
https://hdl.handle.net/21.15107/rcub_cherry_5329 .

Đokić, Jovana, Ranitović, Milisav, Zarić, Anja, Kamberović, Željko, "Dust from e-waste mechanical treatment as a valuable material" (2019),
https://hdl.handle.net/21.15107/rcub_cherry_5329 .

TY  - JOUR
AU  - Mandić, Maja
AU  - Đokić, Jovana
AU  - Gajić, Nataša
AU  - Uljarević, Jelena

AU  - Kamberović, Željko
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3930
AB  - The rising criticality of technologically inevitably metals and the continuous growth of the waste electronics promote a scientific need for development of innovative recycling process, both efficient and selective. Experimental results showed primarily that by pyrometallurgical treatment it is difficult to achieve selectivity, and secondary that the distribution of metals in melting products is too complicated, deviating from the experiential and expected. Therefore, application of an integral pyro - hydrometallurgical treatment is suggested for improved raw materials efficiency. Successful implementation of the developed state-of-art technological process, guarantee more efficient approach to recycling processes, production of new materials which supports the concepts of sustainable development and cleaner production. Proposed technological solution is applicable in industry with relatively low investments compared to expected revenues, allowing companies to become competitive in the regional market and beyond, which is particularly important for small and medium enterprises with lower operating capacities. Techno-economic justification and integral pyro - hydrometallurgical process for waste electronics recycling is presented. This paper explains measures for the further development of the recycling industry as a part of circular economy strategy in Serbia.
PB  - Beograd : Institut za istraživanja i projektovanja u privredi
T2  - Journal of Applied Engineering Science
T1  - Production of technology metals from waste electronics
VL  - 17
IS  - 3
SP  - 400
EP  - 403
DO  - 10.5937/jaes17-22105
ER  - 

@article{
author = "Mandić, Maja and Đokić, Jovana and Gajić, Nataša and Uljarević, Jelena
 and Kamberović, Željko",
year = "2019",
abstract = "The rising criticality of technologically inevitably metals and the continuous growth of the waste electronics promote a scientific need for development of innovative recycling process, both efficient and selective. Experimental results showed primarily that by pyrometallurgical treatment it is difficult to achieve selectivity, and secondary that the distribution of metals in melting products is too complicated, deviating from the experiential and expected. Therefore, application of an integral pyro - hydrometallurgical treatment is suggested for improved raw materials efficiency. Successful implementation of the developed state-of-art technological process, guarantee more efficient approach to recycling processes, production of new materials which supports the concepts of sustainable development and cleaner production. Proposed technological solution is applicable in industry with relatively low investments compared to expected revenues, allowing companies to become competitive in the regional market and beyond, which is particularly important for small and medium enterprises with lower operating capacities. Techno-economic justification and integral pyro - hydrometallurgical process for waste electronics recycling is presented. This paper explains measures for the further development of the recycling industry as a part of circular economy strategy in Serbia.",
publisher = "Beograd : Institut za istraživanja i projektovanja u privredi",
journal = "Journal of Applied Engineering Science",
title = "Production of technology metals from waste electronics",
volume = "17",
number = "3",
pages = "400-403",
doi = "10.5937/jaes17-22105"
}

Mandić, M., Đokić, J., Gajić, N., Uljarević, J.,& Kamberović, Ž.. (2019). Production of technology metals from waste electronics. in Journal of Applied Engineering Science
Beograd : Institut za istraživanja i projektovanja u privredi., 17(3), 400-403.
https://doi.org/10.5937/jaes17-22105

Mandić M, Đokić J, Gajić N, Uljarević J, Kamberović Ž. Production of technology metals from waste electronics. in Journal of Applied Engineering Science. 2019;17(3):400-403.
doi:10.5937/jaes17-22105 .

Mandić, Maja, Đokić, Jovana, Gajić, Nataša, Uljarević, Jelena
, Kamberović, Željko, "Production of technology metals from waste electronics" in Journal of Applied Engineering Science, 17, no. 3 (2019):400-403,
https://doi.org/10.5937/jaes17-22105 . .

TY  - JOUR
AU  - Ranitović, Milisav
AU  - Đokić, Jovana
AU  - Korać, Marija
AU  - Gajić, Nataša
AU  - Dimitrijević, Stevan
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3701
AB  - This study presents the results of the theoretical assessment and a preliminary experimental investigation of technology metals (TM) recovery from magnetic fraction obtained after mechanical treatment of waste printed circuit boards (WPCBs). Experimental work included physical and chemical characterization, thermodynamic analysis, and pyrometallurgical tests corresponding to secondary lead, copper, and steel metallurgy. Technology metals recyclability and recovery potential were evaluated with respect to their distribution between metal and slag phase (difficult for recovering) versus the dust phase (easy for recovering). According to obtained results, it was determined that high-temperature processing of magnetic fraction in the electric arc furnace promotes volatilization of the TM and their pre-concentration in the filter as a dust product from which they could be valorized using further hydrometallurgical methods. © 2019, Association of Metallurgical Engineers of Serbia.
PB  - Association of Metallurgical Engineers of Serbia AMES
T2  - Metallurgical and Materials Engineering
T1  - Recyclability of technology metals from E-waste: Case study of in and Ga recovery from magnetic fraction
VL  - 25
IS  - 3
SP  - 183
EP  - 194
DO  - 10.30544/446
ER  - 

@article{
author = "Ranitović, Milisav and Đokić, Jovana and Korać, Marija and Gajić, Nataša and Dimitrijević, Stevan",
year = "2019",
abstract = "This study presents the results of the theoretical assessment and a preliminary experimental investigation of technology metals (TM) recovery from magnetic fraction obtained after mechanical treatment of waste printed circuit boards (WPCBs). Experimental work included physical and chemical characterization, thermodynamic analysis, and pyrometallurgical tests corresponding to secondary lead, copper, and steel metallurgy. Technology metals recyclability and recovery potential were evaluated with respect to their distribution between metal and slag phase (difficult for recovering) versus the dust phase (easy for recovering). According to obtained results, it was determined that high-temperature processing of magnetic fraction in the electric arc furnace promotes volatilization of the TM and their pre-concentration in the filter as a dust product from which they could be valorized using further hydrometallurgical methods. © 2019, Association of Metallurgical Engineers of Serbia.",
publisher = "Association of Metallurgical Engineers of Serbia AMES",
journal = "Metallurgical and Materials Engineering",
title = "Recyclability of technology metals from E-waste: Case study of in and Ga recovery from magnetic fraction",
volume = "25",
number = "3",
pages = "183-194",
doi = "10.30544/446"
}

Ranitović, M., Đokić, J., Korać, M., Gajić, N.,& Dimitrijević, S.. (2019). Recyclability of technology metals from E-waste: Case study of in and Ga recovery from magnetic fraction. in Metallurgical and Materials Engineering
Association of Metallurgical Engineers of Serbia AMES., 25(3), 183-194.
https://doi.org/10.30544/446

Ranitović M, Đokić J, Korać M, Gajić N, Dimitrijević S. Recyclability of technology metals from E-waste: Case study of in and Ga recovery from magnetic fraction. in Metallurgical and Materials Engineering. 2019;25(3):183-194.
doi:10.30544/446 .

Ranitović, Milisav, Đokić, Jovana, Korać, Marija, Gajić, Nataša, Dimitrijević, Stevan, "Recyclability of technology metals from E-waste: Case study of in and Ga recovery from magnetic fraction" in Metallurgical and Materials Engineering, 25, no. 3 (2019):183-194,
https://doi.org/10.30544/446 . .

TY  - CONF
AU  - Trpčevská, Jarmila
AU  - Plešingerova, Beatrice
AU  - Gajić, Nataša
AU  - Anđić, Zoran
AU  - Kamberović, Željko
AU  - Đokić, Jovana
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2792
AB  - This paper describes two stages process for synthesis of WS2 powder on selected temperatures by using WO3 as a precursor. WO3 submicron particles were prepared by ultrasonic spray pyrolysis of ammonium meta-tungstate (AMT) at 650°C in the air. WS2 particles were obtained by
sulfurization of the WO3 particles in presence of additive K2CO3 in a nitrogen atmosphere, first at
lower temperature (200°C) and followed by reduction at higher temperature (900°C). HSC Chemistry software package 9.0 is used for the analysis of chemistry and thermodynamic
parameters of the processes for synthesis of WS2 powder. The samples of WO3 and WS2 powders were characterized by X-ray diffraction (XRD) measurements. The morphology and composition
of these samples were examined by scanning electron microscopy (SEM) combined with energy
dispersive X-ray analysis (EDX).
PB  - Belgrade : Materials Research Society of Serbia
C3  - Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
T1  - Synthesis of tribological WS2 powder from oxide precursor
SP  - 71
EP  - 71
UR  - https://hdl.handle.net/21.15107/rcub_cherry_2792
ER  - 

@conference{
author = "Trpčevská, Jarmila and Plešingerova, Beatrice and Gajić, Nataša and Anđić, Zoran and Kamberović, Željko and Đokić, Jovana",
year = "2018",
abstract = "This paper describes two stages process for synthesis of WS2 powder on selected temperatures by using WO3 as a precursor. WO3 submicron particles were prepared by ultrasonic spray pyrolysis of ammonium meta-tungstate (AMT) at 650°C in the air. WS2 particles were obtained by
sulfurization of the WO3 particles in presence of additive K2CO3 in a nitrogen atmosphere, first at
lower temperature (200°C) and followed by reduction at higher temperature (900°C). HSC Chemistry software package 9.0 is used for the analysis of chemistry and thermodynamic
parameters of the processes for synthesis of WS2 powder. The samples of WO3 and WS2 powders were characterized by X-ray diffraction (XRD) measurements. The morphology and composition
of these samples were examined by scanning electron microscopy (SEM) combined with energy
dispersive X-ray analysis (EDX).",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018",
title = "Synthesis of tribological WS2 powder from oxide precursor",
pages = "71-71",
url = "https://hdl.handle.net/21.15107/rcub_cherry_2792"
}

Trpčevská, J., Plešingerova, B., Gajić, N., Anđić, Z., Kamberović, Ž.,& Đokić, J.. (2018). Synthesis of tribological WS2 powder from oxide precursor. in Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
Belgrade : Materials Research Society of Serbia., 71-71.
https://hdl.handle.net/21.15107/rcub_cherry_2792

Trpčevská J, Plešingerova B, Gajić N, Anđić Z, Kamberović Ž, Đokić J. Synthesis of tribological WS2 powder from oxide precursor. in Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018. 2018;:71-71.
https://hdl.handle.net/21.15107/rcub_cherry_2792 .

Trpčevská, Jarmila, Plešingerova, Beatrice, Gajić, Nataša, Anđić, Zoran, Kamberović, Željko, Đokić, Jovana, "Synthesis of tribological WS2 powder from oxide precursor" in Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018 (2018):71-71,
https://hdl.handle.net/21.15107/rcub_cherry_2792 .

TY  - JOUR
AU  - Kamberović, Željko
AU  - Ranitović, Milisav
AU  - Korać, Marija
AU  - Anđić, Zoran
AU  - Gajić, Nataša
AU  - Đokić, Jovana
AU  - Jevtić, Sonja
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2164
AB  - This paper presents an experimentally-proved hydrometallurgical process for selective metals recovery from the waste-printed circuit boards (WPCBs) using a combination of conventional and time-saving methods: leaching, cementation, precipitation, reduction and electrowinning. According to the results obtained in the laboratory tests, 92.4% Cu, 98.5% Pb, 96.8% Ag and over 99% Au could be selectively leached and recovered using mineral acids: sulfuric, nitric and aqua regia. Problematic tin recovery was addressed with comprehensive theoretical and experimental work, so 55.4% of Sn could be recovered through the novel physical method, which consists of two-step phase separation. Based on the results, an integral hydrometallurgical route for selective base and precious metals recovery though consecutive steps, (i) Cu, (ii) Sn, (iii) Pb and Ag, and (iv) Au, was developed. The route was tested at scaled-up laboratory level, confirming feasibility of the process and efficiencies of metals recovery. According to the obtained results, the proposed hydrometallurgical route represents an innovative and promising method for selective metals recovery from WPCBs, particularly applicable in small scale hydrometallurgical environments, focused on medium and high grade WPCBs recycling.
PB  - Mdpi, Basel
T2  - METALS
T1  - Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards
VL  - 8
IS  - 6
DO  - 10.3390/met8060441
ER  - 

@article{
author = "Kamberović, Željko and Ranitović, Milisav and Korać, Marija and Anđić, Zoran and Gajić, Nataša and Đokić, Jovana and Jevtić, Sonja",
year = "2018",
abstract = "This paper presents an experimentally-proved hydrometallurgical process for selective metals recovery from the waste-printed circuit boards (WPCBs) using a combination of conventional and time-saving methods: leaching, cementation, precipitation, reduction and electrowinning. According to the results obtained in the laboratory tests, 92.4% Cu, 98.5% Pb, 96.8% Ag and over 99% Au could be selectively leached and recovered using mineral acids: sulfuric, nitric and aqua regia. Problematic tin recovery was addressed with comprehensive theoretical and experimental work, so 55.4% of Sn could be recovered through the novel physical method, which consists of two-step phase separation. Based on the results, an integral hydrometallurgical route for selective base and precious metals recovery though consecutive steps, (i) Cu, (ii) Sn, (iii) Pb and Ag, and (iv) Au, was developed. The route was tested at scaled-up laboratory level, confirming feasibility of the process and efficiencies of metals recovery. According to the obtained results, the proposed hydrometallurgical route represents an innovative and promising method for selective metals recovery from WPCBs, particularly applicable in small scale hydrometallurgical environments, focused on medium and high grade WPCBs recycling.",
publisher = "Mdpi, Basel",
journal = "METALS",
title = "Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards",
volume = "8",
number = "6",
doi = "10.3390/met8060441"
}

Kamberović, Ž., Ranitović, M., Korać, M., Anđić, Z., Gajić, N., Đokić, J.,& Jevtić, S.. (2018). Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards. in METALS
Mdpi, Basel., 8(6).
https://doi.org/10.3390/met8060441

Kamberović Ž, Ranitović M, Korać M, Anđić Z, Gajić N, Đokić J, Jevtić S. Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards. in METALS. 2018;8(6).
doi:10.3390/met8060441 .

Kamberović, Željko, Ranitović, Milisav, Korać, Marija, Anđić, Zoran, Gajić, Nataša, Đokić, Jovana, Jevtić, Sonja, "Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards" in METALS, 8, no. 6 (2018),
https://doi.org/10.3390/met8060441 . .

TY  - CONF
AU  - Gajić, Nataša
AU  - Anđić, Zoran
AU  - Đokić, Jovana
AU  - Kamberović, Željko
PY  - 2017
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5363
AB  - Technology advances have resulted in a growing demand for the new tribology materials. In development of the properties of tribology materials, improvements can be achieved by combining materials in form of composites. The aim of this work was production of solid lubricants composites based on sulfides of technology metals. Selected solid lubricant powders, tin sulfide (SnxSy) and tungsten disulfide (WS2), were synthesized by pyrometallurgical method in rotary tilting tube furnace (ST-1200RGV). The chemical thermodynamic parameters of the synthesis were determined using HSC Chemistry software modeling package. Characterization of the obtained powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and microstructural examination by the scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Finally, the tribological properties of the as-synthesized powders in composite mixture were estimated. It has been shown the beneficial synergistic effect due to unique combination of properties between tin sulfides and tungsten sulfide in composite. In addition, advantage of synergistic tribology material (SnxSy/WS2) is simple method of synthesis and environmentally acceptable components of the composite.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Sixteenth Young Researchers’ Conference Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia
T1  - Synergistic solid lubricants system based on selected sulfides of technology metals
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5363
ER  - 

@conference{
author = "Gajić, Nataša and Anđić, Zoran and Đokić, Jovana and Kamberović, Željko",
year = "2017",
abstract = "Technology advances have resulted in a growing demand for the new tribology materials. In development of the properties of tribology materials, improvements can be achieved by combining materials in form of composites. The aim of this work was production of solid lubricants composites based on sulfides of technology metals. Selected solid lubricant powders, tin sulfide (SnxSy) and tungsten disulfide (WS2), were synthesized by pyrometallurgical method in rotary tilting tube furnace (ST-1200RGV). The chemical thermodynamic parameters of the synthesis were determined using HSC Chemistry software modeling package. Characterization of the obtained powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and microstructural examination by the scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Finally, the tribological properties of the as-synthesized powders in composite mixture were estimated. It has been shown the beneficial synergistic effect due to unique combination of properties between tin sulfides and tungsten sulfide in composite. In addition, advantage of synergistic tribology material (SnxSy/WS2) is simple method of synthesis and environmentally acceptable components of the composite.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Sixteenth Young Researchers’ Conference Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia",
title = "Synergistic solid lubricants system based on selected sulfides of technology metals",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5363"
}

Gajić, N., Anđić, Z., Đokić, J.,& Kamberović, Ž.. (2017). Synergistic solid lubricants system based on selected sulfides of technology metals. in Sixteenth Young Researchers’ Conference Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA..
https://hdl.handle.net/21.15107/rcub_cherry_5363

Gajić N, Anđić Z, Đokić J, Kamberović Ž. Synergistic solid lubricants system based on selected sulfides of technology metals. in Sixteenth Young Researchers’ Conference Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia. 2017;.
https://hdl.handle.net/21.15107/rcub_cherry_5363 .

Gajić, Nataša, Anđić, Zoran, Đokić, Jovana, Kamberović, Željko, "Synergistic solid lubricants system based on selected sulfides of technology metals" in Sixteenth Young Researchers’ Conference Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia (2017),
https://hdl.handle.net/21.15107/rcub_cherry_5363 .

TY  - CONF
AU  - Đokić, Jovana
AU  - Kamberović, Željko
AU  - Korać, Marija
AU  - Ranitović, Milisav
AU  - Todorović, Nemanja
PY  - 2017
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5328
AB  - European Commission has created a list of Critical Raw Materials (CRMs) including In, Ga and Ge which are important electronic metals. Since their scarce natural abundance and growing demand, nowadays major source of In, Ga and Ge are specific by-products from primary base metals production. Considering the concentration of In, Ga and Ge in solution obtained after hydrometallurgical treatment of Waelz oxide, valorization of these metals could be done by liquid-liquid extraction.
The aim of this conceptual study is to propose experimental flow sheet for selective liquid-liquid extraction in order to valorize In, Ga and Ge from the leaching solution.
C3  - 49th Intermational October Conference on Mining and Metallurgy, Proceedings, Bor Lake, Serbia, October 18-21, 2017
T1  - Conceptual study for valorization of In, Ga and Ge
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5328
ER  - 

@conference{
author = "Đokić, Jovana and Kamberović, Željko and Korać, Marija and Ranitović, Milisav and Todorović, Nemanja",
year = "2017",
abstract = "European Commission has created a list of Critical Raw Materials (CRMs) including In, Ga and Ge which are important electronic metals. Since their scarce natural abundance and growing demand, nowadays major source of In, Ga and Ge are specific by-products from primary base metals production. Considering the concentration of In, Ga and Ge in solution obtained after hydrometallurgical treatment of Waelz oxide, valorization of these metals could be done by liquid-liquid extraction.
The aim of this conceptual study is to propose experimental flow sheet for selective liquid-liquid extraction in order to valorize In, Ga and Ge from the leaching solution.",
journal = "49th Intermational October Conference on Mining and Metallurgy, Proceedings, Bor Lake, Serbia, October 18-21, 2017",
title = "Conceptual study for valorization of In, Ga and Ge",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5328"
}

Đokić, J., Kamberović, Ž., Korać, M., Ranitović, M.,& Todorović, N.. (2017). Conceptual study for valorization of In, Ga and Ge. in 49th Intermational October Conference on Mining and Metallurgy, Proceedings, Bor Lake, Serbia, October 18-21, 2017.
https://hdl.handle.net/21.15107/rcub_cherry_5328

Đokić J, Kamberović Ž, Korać M, Ranitović M, Todorović N. Conceptual study for valorization of In, Ga and Ge. in 49th Intermational October Conference on Mining and Metallurgy, Proceedings, Bor Lake, Serbia, October 18-21, 2017. 2017;.
https://hdl.handle.net/21.15107/rcub_cherry_5328 .

Đokić, Jovana, Kamberović, Željko, Korać, Marija, Ranitović, Milisav, Todorović, Nemanja, "Conceptual study for valorization of In, Ga and Ge" in 49th Intermational October Conference on Mining and Metallurgy, Proceedings, Bor Lake, Serbia, October 18-21, 2017 (2017),
https://hdl.handle.net/21.15107/rcub_cherry_5328 .

TY  - CONF
AU  - Gajić, Nataša
AU  - Anđić, Zoran
AU  - Đokić, Jovana
AU  - Kamberović, Željko
PY  - 2017
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5055
AB  - Technology advances have resulted in a growing demand for the new tribology materials. In development of the properties of tribology materials, improvements can be achieved by combining materials in form of composites. The aim of this work was production of solid lubricants composites based on sulfides of technology metals. Selected solid lubricant powders, tin sulfide (Snx Sy) and tungsten disulfide (WS2), were synthesized by pyrometallurgical method in rotary tilting tube furnace (ST-1200RGV). The chemical thermodynamic parameters of the synthesis were determined using HSC Chemistry software modeling package. Characterization of the obtained powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and microstructural examination by the scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Finally, the tribological properties of the as-synthesized powders in composite mixture were estimated. It has been shown the beneficial synergistic effect due to unique combination of properties between tin sulfides and tungsten sulfide in composite. In addition, advantage of synergistic tribology material (SnxSy /WS2) is simple method of synthesis and environmentally acceptable components of the composite
PB  - Belgrade : Institute of Technical Science of SASA
C3  - Sixteenth Young Researchers Conference - Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia
T1  - Synergistic solid lubricants system based on selected sulfides of technology metals
SP  - 64
EP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5055
ER  - 

@conference{
author = "Gajić, Nataša and Anđić, Zoran and Đokić, Jovana and Kamberović, Željko",
year = "2017",
abstract = "Technology advances have resulted in a growing demand for the new tribology materials. In development of the properties of tribology materials, improvements can be achieved by combining materials in form of composites. The aim of this work was production of solid lubricants composites based on sulfides of technology metals. Selected solid lubricant powders, tin sulfide (Snx Sy) and tungsten disulfide (WS2), were synthesized by pyrometallurgical method in rotary tilting tube furnace (ST-1200RGV). The chemical thermodynamic parameters of the synthesis were determined using HSC Chemistry software modeling package. Characterization of the obtained powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and microstructural examination by the scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Finally, the tribological properties of the as-synthesized powders in composite mixture were estimated. It has been shown the beneficial synergistic effect due to unique combination of properties between tin sulfides and tungsten sulfide in composite. In addition, advantage of synergistic tribology material (SnxSy /WS2) is simple method of synthesis and environmentally acceptable components of the composite",
publisher = "Belgrade : Institute of Technical Science of SASA",
journal = "Sixteenth Young Researchers Conference - Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia",
title = "Synergistic solid lubricants system based on selected sulfides of technology metals",
pages = "64-64",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5055"
}

Gajić, N., Anđić, Z., Đokić, J.,& Kamberović, Ž.. (2017). Synergistic solid lubricants system based on selected sulfides of technology metals. in Sixteenth Young Researchers Conference - Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia
Belgrade : Institute of Technical Science of SASA., 64-64.
https://hdl.handle.net/21.15107/rcub_cherry_5055

Gajić N, Anđić Z, Đokić J, Kamberović Ž. Synergistic solid lubricants system based on selected sulfides of technology metals. in Sixteenth Young Researchers Conference - Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia. 2017;:64-64.
https://hdl.handle.net/21.15107/rcub_cherry_5055 .

Gajić, Nataša, Anđić, Zoran, Đokić, Jovana, Kamberović, Željko, "Synergistic solid lubricants system based on selected sulfides of technology metals" in Sixteenth Young Researchers Conference - Materials Science and Engineering, December 6-8, 2017, Belgrade, Serbia (2017):64-64,
https://hdl.handle.net/21.15107/rcub_cherry_5055 .