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  - 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  - 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  - 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  - 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  - Korać, Marija
AU  - Anđić, Zoran
AU  - Kamberović, Željko
AU  - Gajić, Nataša
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5051
AB  - This paper presents sintered materials for use as contacts produced via novel synthesis method of
starting powders by combination of explored conventional routes of thermochemical synthesis and
mechanical alloying.
Starting raw materials for powder synthesis by thermochemical route were soluble salts, nitrates of
copper and aluminum of p.a. quality, dissolved in distilled water (50wt.% solution) in suitable ratio
for final powder to contain 50wt.% of Al2O3 in structure. Nitrate solution was spray dried and
subjected to heat treatment (900 ºC/1h). Obtained oxides were reduced in hydrogen atmosphere
(flow rate 20L/h at 350 °C for 1h) in order to obtain composite of Cu-Al2O3. Produced powders
were used for mechanical alloying of atomized copper (5h, 300 min-1). Final amount of alumina
Al2O3 in composite powder were 1, 1.5 and 2 wt.%. After mechanical alloying obtained powders
were compacted by a uniaxial pressing (8×32×3mm, 500 kN). Sintering of samples was performed
in hydrogen atmosphere in isothermal conditions at five different temperatures in the range from
725-925 °C for 15 to 120 min.
Results of characterization show, that increase of Al2O3 content has more noticeable effect on the
electrical conductivity and hardness than sintering temperature and time. With increase of Al2O3
from 1 to 1.5 wt.% there is a slight decrease in both investigated properties, while with increase up
to 2 wt.% Al2O3 significant decrease in electrical conductivity and hardness of sintered samples is
observed.
According to achieved results optimum sintering parameters for composite materials produced by
novel synthesis method based on copper with dispersed 1% Al2O3 are 875 ºC/60 min.
Based on the achieved results, this method provides production of contact materials with good
combination of electrical and mechanical properties, but with estimated lower production costs.
PB  - Materials Research Society of Serbia
C3  - Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019
T1  - Sintering process optimization for Cu-Al2O3 powders synthesized by novel method
VL  - 48
SP  - 41
EP  - 41
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5051
ER  - 

@conference{
author = "Korać, Marija and Anđić, Zoran and Kamberović, Željko and Gajić, Nataša",
year = "2019",
abstract = "This paper presents sintered materials for use as contacts produced via novel synthesis method of
starting powders by combination of explored conventional routes of thermochemical synthesis and
mechanical alloying.
Starting raw materials for powder synthesis by thermochemical route were soluble salts, nitrates of
copper and aluminum of p.a. quality, dissolved in distilled water (50wt.% solution) in suitable ratio
for final powder to contain 50wt.% of Al2O3 in structure. Nitrate solution was spray dried and
subjected to heat treatment (900 ºC/1h). Obtained oxides were reduced in hydrogen atmosphere
(flow rate 20L/h at 350 °C for 1h) in order to obtain composite of Cu-Al2O3. Produced powders
were used for mechanical alloying of atomized copper (5h, 300 min-1). Final amount of alumina
Al2O3 in composite powder were 1, 1.5 and 2 wt.%. After mechanical alloying obtained powders
were compacted by a uniaxial pressing (8×32×3mm, 500 kN). Sintering of samples was performed
in hydrogen atmosphere in isothermal conditions at five different temperatures in the range from
725-925 °C for 15 to 120 min.
Results of characterization show, that increase of Al2O3 content has more noticeable effect on the
electrical conductivity and hardness than sintering temperature and time. With increase of Al2O3
from 1 to 1.5 wt.% there is a slight decrease in both investigated properties, while with increase up
to 2 wt.% Al2O3 significant decrease in electrical conductivity and hardness of sintered samples is
observed.
According to achieved results optimum sintering parameters for composite materials produced by
novel synthesis method based on copper with dispersed 1% Al2O3 are 875 ºC/60 min.
Based on the achieved results, this method provides production of contact materials with good
combination of electrical and mechanical properties, but with estimated lower production costs.",
publisher = "Materials Research Society of Serbia",
journal = "Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019",
title = "Sintering process optimization for Cu-Al2O3 powders synthesized by novel method",
volume = "48",
pages = "41-41",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5051"
}

Korać, M., Anđić, Z., Kamberović, Ž.,& Gajić, N.. (2019). Sintering process optimization for Cu-Al2O3 powders synthesized by novel method. in Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019
Materials Research Society of Serbia., 48, 41-41.
https://hdl.handle.net/21.15107/rcub_cherry_5051

Korać M, Anđić Z, Kamberović Ž, Gajić N. Sintering process optimization for Cu-Al2O3 powders synthesized by novel method. in Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019. 2019;48:41-41.
https://hdl.handle.net/21.15107/rcub_cherry_5051 .

Korać, Marija, Anđić, Zoran, Kamberović, Željko, Gajić, Nataša, "Sintering process optimization for Cu-Al2O3 powders synthesized by novel method" in Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019, 48 (2019):41-41,
https://hdl.handle.net/21.15107/rcub_cherry_5051 .

TY  - JOUR
AU  - Gajić, Nataša
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Korać, Marija
AU  - Trpčevska, Jarmila
AU  - Stamatović, Mirko
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5085
AB  - The aim of this research was to study the effect of graphite addition in the
process of synthesis of tribological materials based on tin sulphides. The tin sulphides
powders were synthesized from selected precursors by pyrometallurgical
method in rotary tilting tube furnace. The thermodynamic parameters of the synthesis
were determined using HSC Chemistry software modelling package. In
addition, the synthesis process was also characterized by the thermal analysis
method: simultaneous differential scanning calorimetry and thermogravimetry
(DCS-TGA). The characterization of the synthesized tin sulphides powders included
analysis of chemical composition by optical emission spectroscopy, phase
composition identification by X-ray diffraction (XRD) and examination of morphology,
as well as elemental composition by scanning electron microscopy (SEM)
with energy-dispersive spectroscopy (EDS). The hexagonal SnS2 and orthorhombic
Sn2S3 phases were formed after the thermal treatment of starting powders in nitrogen
atmosphere. The obtained results indicate the positive effects of the graphite
addition which enables the synthesis of tin sulphide powders with appropriate
content of sulphide phases with minimal loss of sulphur.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive
VL  - 84
IS  - 4
SP  - 423
EP  - 433
DO  - 10.2298/JSC180628102G
ER  - 

@article{
author = "Gajić, Nataša and Kamberović, Željko and Anđić, Zoran and Korać, Marija and Trpčevska, Jarmila and Stamatović, Mirko",
year = "2019",
abstract = "The aim of this research was to study the effect of graphite addition in the
process of synthesis of tribological materials based on tin sulphides. The tin sulphides
powders were synthesized from selected precursors by pyrometallurgical
method in rotary tilting tube furnace. The thermodynamic parameters of the synthesis
were determined using HSC Chemistry software modelling package. In
addition, the synthesis process was also characterized by the thermal analysis
method: simultaneous differential scanning calorimetry and thermogravimetry
(DCS-TGA). The characterization of the synthesized tin sulphides powders included
analysis of chemical composition by optical emission spectroscopy, phase
composition identification by X-ray diffraction (XRD) and examination of morphology,
as well as elemental composition by scanning electron microscopy (SEM)
with energy-dispersive spectroscopy (EDS). The hexagonal SnS2 and orthorhombic
Sn2S3 phases were formed after the thermal treatment of starting powders in nitrogen
atmosphere. The obtained results indicate the positive effects of the graphite
addition which enables the synthesis of tin sulphide powders with appropriate
content of sulphide phases with minimal loss of sulphur.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive",
volume = "84",
number = "4",
pages = "423-433",
doi = "10.2298/JSC180628102G"
}

Gajić, N., Kamberović, Ž., Anđić, Z., Korać, M., Trpčevska, J.,& Stamatović, M.. (2019). Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 84(4), 423-433.
https://doi.org/10.2298/JSC180628102G

Gajić N, Kamberović Ž, Anđić Z, Korać M, Trpčevska J, Stamatović M. Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive. in Journal of the Serbian Chemical Society. 2019;84(4):423-433.
doi:10.2298/JSC180628102G .

Gajić, Nataša, Kamberović, Željko, Anđić, Zoran, Korać, Marija, Trpčevska, Jarmila, Stamatović, Mirko, "Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive" in Journal of the Serbian Chemical Society, 84, no. 4 (2019):423-433,
https://doi.org/10.2298/JSC180628102G . .

TY  - JOUR
AU  - Gajić, Nataša
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Trpčevská, Jarmila
AU  - Plešingerova, Beatrice
AU  - Korać, Marija
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2868
AB  - This paper describes the synthesis of tungsten disulfide (WS 2 ) powder by the sulfurization of tungsten trioxide (WO 3 ) particles in the presence of additive potassium carbonate (K 2 CO 3 ) in nitrogen (N 2 ) atmosphere, first at lower temperature (200 ◦ C) and followed by reduction at higher temperature (900 ◦ C). In addition, the ultrasonic spray pyrolysis of ammonium meta-tungstate hydrate (AMT) was used for the production of WO 3 particles at 650 ◦ C in air. The HSC Chemistry® software package 9.0 was used for the analysis of chemistry and thermodynamic parameters of the processes for WS 2 powder synthesis. The crystalline structure and phase composition of all synthesized powders were analyzed by X-ray diffraction (XRD) measurements. The morphology and chemical composition of these samples were examined by scanning electron microscopy (SEM) combined with energy dispersive X-ray analysis (EDX).
PB  - MDPI
T2  - Metals
T1  - Synthesis of tribological WS 2 powder from WO 3 prepared by ultrasonic spray pyrolysis (USP)
VL  - 9
IS  - 3
SP  - 1
EP  - 15
DO  - 10.3390/met9030277
ER  - 

@article{
author = "Gajić, Nataša and Kamberović, Željko and Anđić, Zoran and Trpčevská, Jarmila and Plešingerova, Beatrice and Korać, Marija",
year = "2019",
abstract = "This paper describes the synthesis of tungsten disulfide (WS 2 ) powder by the sulfurization of tungsten trioxide (WO 3 ) particles in the presence of additive potassium carbonate (K 2 CO 3 ) in nitrogen (N 2 ) atmosphere, first at lower temperature (200 ◦ C) and followed by reduction at higher temperature (900 ◦ C). In addition, the ultrasonic spray pyrolysis of ammonium meta-tungstate hydrate (AMT) was used for the production of WO 3 particles at 650 ◦ C in air. The HSC Chemistry® software package 9.0 was used for the analysis of chemistry and thermodynamic parameters of the processes for WS 2 powder synthesis. The crystalline structure and phase composition of all synthesized powders were analyzed by X-ray diffraction (XRD) measurements. The morphology and chemical composition of these samples were examined by scanning electron microscopy (SEM) combined with energy dispersive X-ray analysis (EDX).",
publisher = "MDPI",
journal = "Metals",
title = "Synthesis of tribological WS 2 powder from WO 3 prepared by ultrasonic spray pyrolysis (USP)",
volume = "9",
number = "3",
pages = "1-15",
doi = "10.3390/met9030277"
}

Gajić, N., Kamberović, Ž., Anđić, Z., Trpčevská, J., Plešingerova, B.,& Korać, M.. (2019). Synthesis of tribological WS 2 powder from WO 3 prepared by ultrasonic spray pyrolysis (USP). in Metals
MDPI., 9(3), 1-15.
https://doi.org/10.3390/met9030277

Gajić N, Kamberović Ž, Anđić Z, Trpčevská J, Plešingerova B, Korać M. Synthesis of tribological WS 2 powder from WO 3 prepared by ultrasonic spray pyrolysis (USP). in Metals. 2019;9(3):1-15.
doi:10.3390/met9030277 .

Gajić, Nataša, Kamberović, Željko, Anđić, Zoran, Trpčevská, Jarmila, Plešingerova, Beatrice, Korać, Marija, "Synthesis of tribological WS 2 powder from WO 3 prepared by ultrasonic spray pyrolysis (USP)" in Metals, 9, no. 3 (2019):1-15,
https://doi.org/10.3390/met9030277 . .

TY  - JOUR
AU  - Gajić, Nataša
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Korać, Marija
AU  - Trpčevská, Jarmila
AU  - Stamatović, Mirko
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3289
AB  - The aim of this research was to study the effect of graphite addition in the process of synthesis of tribological materials based on tin sulphides. The tin sulphides powders were synthesized from selected precursors by pyrometallurgical method in rotary tilting tube furnace. The thermodynamic parameters of the synthesis were determined using HSC Chemistry software modelling package. In addition, the synthesis process was also characterized by the thermal analysis method: simultaneous differential scanning calorimetry and thermogravimetry (DCS-TGA). The characterization of the synthesized tin sulphides powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and examination of morphology, as well as elemental composition by scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS). The hexagonal SnS2 and orthorhombic Sn2S3 phases were formed after the thermal treatment of starting powders in nitrogen atmosphere. The obtained results indicate the positive effects of the graphite addition which enables the synthesis of tin sulphide powders with appropriate content of sulphide phases with minimal loss of sulphur.
PB  - Journal of the Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive
VL  - 84
IS  - 4
SP  - 423
EP  - 433
DO  - 10.2298/JSC180628102G
ER  - 

@article{
author = "Gajić, Nataša and Kamberović, Željko and Anđić, Zoran and Korać, Marija and Trpčevská, Jarmila and Stamatović, Mirko",
year = "2019",
abstract = "The aim of this research was to study the effect of graphite addition in the process of synthesis of tribological materials based on tin sulphides. The tin sulphides powders were synthesized from selected precursors by pyrometallurgical method in rotary tilting tube furnace. The thermodynamic parameters of the synthesis were determined using HSC Chemistry software modelling package. In addition, the synthesis process was also characterized by the thermal analysis method: simultaneous differential scanning calorimetry and thermogravimetry (DCS-TGA). The characterization of the synthesized tin sulphides powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and examination of morphology, as well as elemental composition by scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS). The hexagonal SnS2 and orthorhombic Sn2S3 phases were formed after the thermal treatment of starting powders in nitrogen atmosphere. The obtained results indicate the positive effects of the graphite addition which enables the synthesis of tin sulphide powders with appropriate content of sulphide phases with minimal loss of sulphur.",
publisher = "Journal of the Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive",
volume = "84",
number = "4",
pages = "423-433",
doi = "10.2298/JSC180628102G"
}

Gajić, N., Kamberović, Ž., Anđić, Z., Korać, M., Trpčevská, J.,& Stamatović, M.. (2019). Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive. in Journal of the Serbian Chemical Society
Journal of the Serbian Chemical Society., 84(4), 423-433.
https://doi.org/10.2298/JSC180628102G

Gajić N, Kamberović Ž, Anđić Z, Korać M, Trpčevská J, Stamatović M. Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive. in Journal of the Serbian Chemical Society. 2019;84(4):423-433.
doi:10.2298/JSC180628102G .

Gajić, Nataša, Kamberović, Željko, Anđić, Zoran, Korać, Marija, Trpčevská, Jarmila, Stamatović, Mirko, "Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive" in Journal of the Serbian Chemical Society, 84, no. 4 (2019):423-433,
https://doi.org/10.2298/JSC180628102G . .

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  - 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 .

TY  - CONF
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Korać, Marija
AU  - Gavrilovski, Milorad
AU  - Mihailović, Aleksandar
AU  - Jovanović, Nikola
AU  - Gajić, Nataša
PY  - 2015
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5312
AB  - This paper presents the synthesis of multipurpose metal sulfide tribological materials, as a replacement for conventional tribological materials containing migratory heavy metals, harmful for working and living environment. Tin sulfide powder in crystalline form, with appropriate content of sulfide phases, was synthesized by pyrometallurgical method. By application of an appropriate temperature-time regime for the synthesis, is provided minimal loss of sulfur and reduction its negative impact on the environment. Characterization of synthesized powder included the determination of sulfur loss, chemical analysis, XRD analysis and microstructural examination by scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS).
PB  - Mining and Metallurgy Institute Bor
C3  - Proceedings of 47th International October Conference on Mining and Metallurgy, October 6, 2015
T1  - Synthesis of environmentally friendly multipurpose metal sulfide tribological materials
SP  - 331
EP  - 334
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5312
ER  - 

@conference{
author = "Kamberović, Željko and Anđić, Zoran and Korać, Marija and Gavrilovski, Milorad and Mihailović, Aleksandar and Jovanović, Nikola and Gajić, Nataša",
year = "2015",
abstract = "This paper presents the synthesis of multipurpose metal sulfide tribological materials, as a replacement for conventional tribological materials containing migratory heavy metals, harmful for working and living environment. Tin sulfide powder in crystalline form, with appropriate content of sulfide phases, was synthesized by pyrometallurgical method. By application of an appropriate temperature-time regime for the synthesis, is provided minimal loss of sulfur and reduction its negative impact on the environment. Characterization of synthesized powder included the determination of sulfur loss, chemical analysis, XRD analysis and microstructural examination by scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS).",
publisher = "Mining and Metallurgy Institute Bor",
journal = "Proceedings of 47th International October Conference on Mining and Metallurgy, October 6, 2015",
title = "Synthesis of environmentally friendly multipurpose metal sulfide tribological materials",
pages = "331-334",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5312"
}

Kamberović, Ž., Anđić, Z., Korać, M., Gavrilovski, M., Mihailović, A., Jovanović, N.,& Gajić, N.. (2015). Synthesis of environmentally friendly multipurpose metal sulfide tribological materials. in Proceedings of 47th International October Conference on Mining and Metallurgy, October 6, 2015
Mining and Metallurgy Institute Bor., 331-334.
https://hdl.handle.net/21.15107/rcub_cherry_5312

Kamberović Ž, Anđić Z, Korać M, Gavrilovski M, Mihailović A, Jovanović N, Gajić N. Synthesis of environmentally friendly multipurpose metal sulfide tribological materials. in Proceedings of 47th International October Conference on Mining and Metallurgy, October 6, 2015. 2015;:331-334.
https://hdl.handle.net/21.15107/rcub_cherry_5312 .

Kamberović, Željko, Anđić, Zoran, Korać, Marija, Gavrilovski, Milorad, Mihailović, Aleksandar, Jovanović, Nikola, Gajić, Nataša, "Synthesis of environmentally friendly multipurpose metal sulfide tribological materials" in Proceedings of 47th International October Conference on Mining and Metallurgy, October 6, 2015 (2015):331-334,
https://hdl.handle.net/21.15107/rcub_cherry_5312 .

TY  - JOUR
AU  - Nikolić, Vesna
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Korać, Marija
AU  - Sokic, Miroslav
AU  - Gajić, Nataša
AU  - Jovanovic, Nikola
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/579
AB  - The goal of this research was to examine exploitation properties of Ni-Pd/Al2O3 catalyst supported on alpha-Al2O3 based foam in the dry methane reforming. The catalyst was prepared by using aerosol method. Chloride precursors for Ni and Pd were reduced by hydrogen at low temperature of 533 K, without previous calcination. The reforming experiment was performed for 3 h, with standing time of 1 h for each of the following temperatures: 873, 973 and 1023 K. Conclusions on selectivity, catalytic activity and stability were made on the basis of CO and H-2 yields.
PB  - Assoc Metallurgical Engineers Serbia, Belgrade
T2  - Metallurgical and Materials Engineering
T1  - Exploitation Properties of Ni-Pd/Al2o3 Catalyst Supported on Ceramic Foam
VL  - 21
IS  - 4
SP  - 277
EP  - 282
DO  - 10.30544/74
ER  - 

@article{
author = "Nikolić, Vesna and Kamberović, Željko and Anđić, Zoran and Korać, Marija and Sokic, Miroslav and Gajić, Nataša and Jovanovic, Nikola",
year = "2015",
abstract = "The goal of this research was to examine exploitation properties of Ni-Pd/Al2O3 catalyst supported on alpha-Al2O3 based foam in the dry methane reforming. The catalyst was prepared by using aerosol method. Chloride precursors for Ni and Pd were reduced by hydrogen at low temperature of 533 K, without previous calcination. The reforming experiment was performed for 3 h, with standing time of 1 h for each of the following temperatures: 873, 973 and 1023 K. Conclusions on selectivity, catalytic activity and stability were made on the basis of CO and H-2 yields.",
publisher = "Assoc Metallurgical Engineers Serbia, Belgrade",
journal = "Metallurgical and Materials Engineering",
title = "Exploitation Properties of Ni-Pd/Al2o3 Catalyst Supported on Ceramic Foam",
volume = "21",
number = "4",
pages = "277-282",
doi = "10.30544/74"
}

Nikolić, V., Kamberović, Ž., Anđić, Z., Korać, M., Sokic, M., Gajić, N.,& Jovanovic, N.. (2015). Exploitation Properties of Ni-Pd/Al2o3 Catalyst Supported on Ceramic Foam. in Metallurgical and Materials Engineering
Assoc Metallurgical Engineers Serbia, Belgrade., 21(4), 277-282.
https://doi.org/10.30544/74

Nikolić V, Kamberović Ž, Anđić Z, Korać M, Sokic M, Gajić N, Jovanovic N. Exploitation Properties of Ni-Pd/Al2o3 Catalyst Supported on Ceramic Foam. in Metallurgical and Materials Engineering. 2015;21(4):277-282.
doi:10.30544/74 .

Nikolić, Vesna, Kamberović, Željko, Anđić, Zoran, Korać, Marija, Sokic, Miroslav, Gajić, Nataša, Jovanovic, Nikola, "Exploitation Properties of Ni-Pd/Al2o3 Catalyst Supported on Ceramic Foam" in Metallurgical and Materials Engineering, 21, no. 4 (2015):277-282,
https://doi.org/10.30544/74 . .