Zunic, Marija J.

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  • Zunic, Marija J. (3)
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Author's Bibliography

Electrooxidation of p-nitrophenol using a composite organo-smectite clay glassy carbon electrode

Zunic, Marija J.; Milutinović-Nikolić, Aleksandra D.; Stanković, Dalibor; Manojlović, Dragan D.; Jović-Jovičić, Nataša; Banković, Predrag; Mojović, Zorica D.; Jovanović, Dušan M.

(Elsevier Science Bv, Amsterdam, 2014)

TY  - JOUR
AU  - Zunic, Marija J.
AU  - Milutinović-Nikolić, Aleksandra D.
AU  - Stanković, Dalibor
AU  - Manojlović, Dragan D.
AU  - Jović-Jovičić, Nataša
AU  - Banković, Predrag
AU  - Mojović, Zorica D.
AU  - Jovanović, Dušan M.
PY  - 2014
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1833
AB  - Bentonite clay rich in smectite clay mineral from seldom investigated locality Mecji Do (MD) in Serbia was modified. The organomodification was performed with different loadings of benzyltrimethylammonium (BTMA) cation. The characterization of clay-based samples was performed, including XRD, FTIR and chemical and textural analysis. Electrochemical investigation was performed on a glassy carbon electrode (GCE) support with thin film of homogenously deposited either Na-enriched or one of organomodified clays forming composite electrodes. The behavior of the composite electrodes in the electrooxidation of p-nitrophenol (p-NP) in acidic media was analyzed using multisweep cyclic voltammetry. Oxidation of p-NP occurred at 1.2 V vs. Ag/AgCl for all investigated electrodes. The results indicate that the incorporation of BTMA cations into smectite enhanced the electrode stability toward the electrooxidation of p-NP in comparison to bare GCE and composite electrode based on Na-enriched clay. The current density for the p-NP oxidation wave slightly decreased with the increase of BTMA loading. On the other hand the electrode stability was significantly improved with the increase of BTMA loading. (C) 2014 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Surface Science
T1  - Electrooxidation of p-nitrophenol using a composite organo-smectite clay glassy carbon electrode
VL  - 313
SP  - 440
EP  - 448
DO  - 10.1016/j.apsusc.2014.05.228
ER  - 
@article{
author = "Zunic, Marija J. and Milutinović-Nikolić, Aleksandra D. and Stanković, Dalibor and Manojlović, Dragan D. and Jović-Jovičić, Nataša and Banković, Predrag and Mojović, Zorica D. and Jovanović, Dušan M.",
year = "2014",
abstract = "Bentonite clay rich in smectite clay mineral from seldom investigated locality Mecji Do (MD) in Serbia was modified. The organomodification was performed with different loadings of benzyltrimethylammonium (BTMA) cation. The characterization of clay-based samples was performed, including XRD, FTIR and chemical and textural analysis. Electrochemical investigation was performed on a glassy carbon electrode (GCE) support with thin film of homogenously deposited either Na-enriched or one of organomodified clays forming composite electrodes. The behavior of the composite electrodes in the electrooxidation of p-nitrophenol (p-NP) in acidic media was analyzed using multisweep cyclic voltammetry. Oxidation of p-NP occurred at 1.2 V vs. Ag/AgCl for all investigated electrodes. The results indicate that the incorporation of BTMA cations into smectite enhanced the electrode stability toward the electrooxidation of p-NP in comparison to bare GCE and composite electrode based on Na-enriched clay. The current density for the p-NP oxidation wave slightly decreased with the increase of BTMA loading. On the other hand the electrode stability was significantly improved with the increase of BTMA loading. (C) 2014 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Surface Science",
title = "Electrooxidation of p-nitrophenol using a composite organo-smectite clay glassy carbon electrode",
volume = "313",
pages = "440-448",
doi = "10.1016/j.apsusc.2014.05.228"
}
Zunic, M. J., Milutinović-Nikolić, A. D., Stanković, D., Manojlović, D. D., Jović-Jovičić, N., Banković, P., Mojović, Z. D.,& Jovanović, D. M.. (2014). Electrooxidation of p-nitrophenol using a composite organo-smectite clay glassy carbon electrode. in Applied Surface Science
Elsevier Science Bv, Amsterdam., 313, 440-448.
https://doi.org/10.1016/j.apsusc.2014.05.228
Zunic MJ, Milutinović-Nikolić AD, Stanković D, Manojlović DD, Jović-Jovičić N, Banković P, Mojović ZD, Jovanović DM. Electrooxidation of p-nitrophenol using a composite organo-smectite clay glassy carbon electrode. in Applied Surface Science. 2014;313:440-448.
doi:10.1016/j.apsusc.2014.05.228 .
Zunic, Marija J., Milutinović-Nikolić, Aleksandra D., Stanković, Dalibor, Manojlović, Dragan D., Jović-Jovičić, Nataša, Banković, Predrag, Mojović, Zorica D., Jovanović, Dušan M., "Electrooxidation of p-nitrophenol using a composite organo-smectite clay glassy carbon electrode" in Applied Surface Science, 313 (2014):440-448,
https://doi.org/10.1016/j.apsusc.2014.05.228 . .
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Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5

Sandic, Zvjezdana P.; Zunic, Marija J.; Maksin, Danijela D.; Milutinović-Nikolić, Aleksandra D.; Popović, Aleksandar R.; Jovanovic, Dugan M.; Nastasović, Aleksandra B.

(Assoc Chemical Engineers Serbia, Belgrade, 2014)

TY  - JOUR
AU  - Sandic, Zvjezdana P.
AU  - Zunic, Marija J.
AU  - Maksin, Danijela D.
AU  - Milutinović-Nikolić, Aleksandra D.
AU  - Popović, Aleksandar R.
AU  - Jovanovic, Dugan M.
AU  - Nastasović, Aleksandra B.
PY  - 2014
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1643
AB  - In this paper, macroporous glycidyl methacrylate and ethylene glycol dimethacrylate copolymer functionalized with diethylene triamine (PGME-deta), was evaluated as Reactive Black 5 (RB5) sorbent. Batch RB5 removal from aqueous solution by PGME-deta was investigated by varying pH, contact time, sorbent dosage, initial dye concentration and temperature. The sorption is pH sensitive having maximum at pH 2 (dye removal of 85%), decreasing with the increase of pH (dye removal of 24% at pH 11) after 60 min. Sorption kinetics was fitted to chemical-reaction and particle-diffusion models (pseudo-first-, pseudo-second-order, intraparticle diffusion and Mckay models). The pseudo-second-order kinetic model accurately predicted the RB5 amount sorbed under all investigated operating conditions, while the intraparticle diffusion was the dominant rate-limiting mechanism. The diffusion mechanism was more prevalent with the decrease in temperature and the increase in concentration. The isotherm data was best fitted with the Langmuir model, indicating homogeneous distribution of active sites on PGME-deta and monolayer sorption, with the maximum sorption capacity of 353 mg g(-1). The calculated sorption rates improved with increasing temperature and an activation energy close to 40 kj mol(-1) was determined, suggesting that chemisorption was also rate-controlling.
AB  - U okviru ovog rada ispitana je mogućnost korišćenja makroporoznog kopolimera glicidilmetakrilata i etilenglikoldimetakrilata funkcionalizovanog reakcijom otvaranja epoksidnih grupa sa dietilentriaminom (PGME-deta) kao sorbenta reaktivne tekstilne boje Reactive Black 5 (RB5). U šaržnim uslovima je ispitano uklanjanje RB5 iz vodenog rastvora pomoću PGME-deta, variranjem pH, vremena kontakta, mase sorbenta, početne koncentracije boje i temperature. PGME-deta je pokazao afinitet za sorpciju RB5 zbog prisustva protonovanih amino grupa koje privlače anjonske sulfonatne grupe u molekulu boje i mogućnosti stvaranja vodoničnih veza između sorbenta i sorbata. Kinetika sorpcije je analizirana pomoću četiri kinetička modela (pseudo-prvog, pseudo-drugog reda, unutarčestične difuzije i Mekej) da bi se odredilo koji model najbolje opisuje sorpciju RB5. Zapažen je izrazit uticaj pH vrednosti na sorpciju RB5, sa maksimumom na pH 2 (pri čemu je efikasnost uklanjanja boje 85%), i smanjenjem količine sorbovane boje sa povećanjem pH (količina uklonjene boje na pH 11 posle 60 min iznosi samo 24%). Izučavanjem kinetike sorpcije pokazalo se da sorpcija RB5 pomoću PGME-deta sledi kinetički model pseudo-drugog reda (PSO), sugerišući da je brzina sorpcije kontrolisana kapacitetom sorbenta i koncentracijom sorbata. Mehanizam procesa dominantno čini unutarčestična difuzija, uz manji uticaj difuzije kroz film. Ovi mehanizmi difuzije su izraženiji pri nižim temperaturama i većim koncentracijama. Langmirov model najbolje opisuje ravnotežnu izotermu, ukazujući na homogenu raspodelu aktivnih mesta na površini PGME-deta i monoslojnu sorpciju. Maksimalni sorpcioni kapacitet izračunat iz Langmirove izoterme iznosi 353 mg g-1. Zapaženo je da se brzina sorpcije povećava sa povećanjem temperature. Izračunata vrednost aktivacione energije od oko 40 kJ mol-1 potvrđuje da se radi o procesu koji dominantno kontroliše hemisorpcija.
PB  - Assoc Chemical Engineers Serbia, Belgrade
T2  - Hemijska industrija
T1  - Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5
T1  - Makroporozni kopolimer na bazi glicidilmetakrilata funkcionalizovan sa dietilentriaminom kao sorbent tekstilne boje Reactive Black 5
VL  - 68
IS  - 6
SP  - 685
EP  - 699
DO  - 10.2298/HEMIND140127023S
ER  - 
@article{
author = "Sandic, Zvjezdana P. and Zunic, Marija J. and Maksin, Danijela D. and Milutinović-Nikolić, Aleksandra D. and Popović, Aleksandar R. and Jovanovic, Dugan M. and Nastasović, Aleksandra B.",
year = "2014",
abstract = "In this paper, macroporous glycidyl methacrylate and ethylene glycol dimethacrylate copolymer functionalized with diethylene triamine (PGME-deta), was evaluated as Reactive Black 5 (RB5) sorbent. Batch RB5 removal from aqueous solution by PGME-deta was investigated by varying pH, contact time, sorbent dosage, initial dye concentration and temperature. The sorption is pH sensitive having maximum at pH 2 (dye removal of 85%), decreasing with the increase of pH (dye removal of 24% at pH 11) after 60 min. Sorption kinetics was fitted to chemical-reaction and particle-diffusion models (pseudo-first-, pseudo-second-order, intraparticle diffusion and Mckay models). The pseudo-second-order kinetic model accurately predicted the RB5 amount sorbed under all investigated operating conditions, while the intraparticle diffusion was the dominant rate-limiting mechanism. The diffusion mechanism was more prevalent with the decrease in temperature and the increase in concentration. The isotherm data was best fitted with the Langmuir model, indicating homogeneous distribution of active sites on PGME-deta and monolayer sorption, with the maximum sorption capacity of 353 mg g(-1). The calculated sorption rates improved with increasing temperature and an activation energy close to 40 kj mol(-1) was determined, suggesting that chemisorption was also rate-controlling., U okviru ovog rada ispitana je mogućnost korišćenja makroporoznog kopolimera glicidilmetakrilata i etilenglikoldimetakrilata funkcionalizovanog reakcijom otvaranja epoksidnih grupa sa dietilentriaminom (PGME-deta) kao sorbenta reaktivne tekstilne boje Reactive Black 5 (RB5). U šaržnim uslovima je ispitano uklanjanje RB5 iz vodenog rastvora pomoću PGME-deta, variranjem pH, vremena kontakta, mase sorbenta, početne koncentracije boje i temperature. PGME-deta je pokazao afinitet za sorpciju RB5 zbog prisustva protonovanih amino grupa koje privlače anjonske sulfonatne grupe u molekulu boje i mogućnosti stvaranja vodoničnih veza između sorbenta i sorbata. Kinetika sorpcije je analizirana pomoću četiri kinetička modela (pseudo-prvog, pseudo-drugog reda, unutarčestične difuzije i Mekej) da bi se odredilo koji model najbolje opisuje sorpciju RB5. Zapažen je izrazit uticaj pH vrednosti na sorpciju RB5, sa maksimumom na pH 2 (pri čemu je efikasnost uklanjanja boje 85%), i smanjenjem količine sorbovane boje sa povećanjem pH (količina uklonjene boje na pH 11 posle 60 min iznosi samo 24%). Izučavanjem kinetike sorpcije pokazalo se da sorpcija RB5 pomoću PGME-deta sledi kinetički model pseudo-drugog reda (PSO), sugerišući da je brzina sorpcije kontrolisana kapacitetom sorbenta i koncentracijom sorbata. Mehanizam procesa dominantno čini unutarčestična difuzija, uz manji uticaj difuzije kroz film. Ovi mehanizmi difuzije su izraženiji pri nižim temperaturama i većim koncentracijama. Langmirov model najbolje opisuje ravnotežnu izotermu, ukazujući na homogenu raspodelu aktivnih mesta na površini PGME-deta i monoslojnu sorpciju. Maksimalni sorpcioni kapacitet izračunat iz Langmirove izoterme iznosi 353 mg g-1. Zapaženo je da se brzina sorpcije povećava sa povećanjem temperature. Izračunata vrednost aktivacione energije od oko 40 kJ mol-1 potvrđuje da se radi o procesu koji dominantno kontroliše hemisorpcija.",
publisher = "Assoc Chemical Engineers Serbia, Belgrade",
journal = "Hemijska industrija",
title = "Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5, Makroporozni kopolimer na bazi glicidilmetakrilata funkcionalizovan sa dietilentriaminom kao sorbent tekstilne boje Reactive Black 5",
volume = "68",
number = "6",
pages = "685-699",
doi = "10.2298/HEMIND140127023S"
}
Sandic, Z. P., Zunic, M. J., Maksin, D. D., Milutinović-Nikolić, A. D., Popović, A. R., Jovanovic, D. M.,& Nastasović, A. B.. (2014). Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5. in Hemijska industrija
Assoc Chemical Engineers Serbia, Belgrade., 68(6), 685-699.
https://doi.org/10.2298/HEMIND140127023S
Sandic ZP, Zunic MJ, Maksin DD, Milutinović-Nikolić AD, Popović AR, Jovanovic DM, Nastasović AB. Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5. in Hemijska industrija. 2014;68(6):685-699.
doi:10.2298/HEMIND140127023S .
Sandic, Zvjezdana P., Zunic, Marija J., Maksin, Danijela D., Milutinović-Nikolić, Aleksandra D., Popović, Aleksandar R., Jovanovic, Dugan M., Nastasović, Aleksandra B., "Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5" in Hemijska industrija, 68, no. 6 (2014):685-699,
https://doi.org/10.2298/HEMIND140127023S . .
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Modified Bentonite as Adsorbent and Catalyst for Purification of Wastewaters Containing Dyes

Zunic, Marija J.; Milutinović-Nikolić, Aleksandra D.; Jović-Jovičić, Nataša; Banković, Predrag; Mojović, Zorica D.; Manojlović, Dragan D.; Jovanović, Dušan M.

(Assoc Chemists & Chemical Engineers Of Serbia, Belgrade, 2010)

TY  - JOUR
AU  - Zunic, Marija J.
AU  - Milutinović-Nikolić, Aleksandra D.
AU  - Jović-Jovičić, Nataša
AU  - Banković, Predrag
AU  - Mojović, Zorica D.
AU  - Manojlović, Dragan D.
AU  - Jovanović, Dušan M.
PY  - 2010
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1093
AB  - Modification and characterization of bentonite from location Bogovina, Serbia was performed in order to obtain material applicable in wastewater purification. The  lt 75 mu m bentonite fraction was used in organobentonite synthesis while the  lt 2 mu m bentonite fraction, obtained by hydroseparation was used in pillaring procedure. Organo-modification of bentonite was performed with (1-hexadecyl)trimethylammonium bromide (HDTMA-Br). Pillared bentonite was obtained using standard procedure. Al3+ and Fe3+ were incorporated in pillars in 4:1 ratio and applied as catalyst in catalytic wet peroxide oxidation. Differences in structure of starting and modified bentonites were established by XRD analysis and nitrogen physisorption on -196 degrees C. The (001) smectite peak around 2 theta = 6 degrees shifts during the modification process. The Na-exchange process lowered d(001) from 1.53 nm (2 theta = 5.78 degrees) for starting clay to 1.28 nm (2 theta = 6.92 degrees), but the clay retained its swelling properties. The pillaring process increased and fixed the basal spacing to 1.74 nm. Intercalation of HDTMA ions into smectite structure increased d(001) to 2.00 nm for organobentonite. Specific surface area, S-BET, was affected by particle size and type of modification. The samples with finer bentonite fraction had higher S-BET due to increased smectite content. Na-exchanged bentonite samples had higher S-BET value than starting clay samples of same granulation. Organomodification caused dramatic decrease in S-BET value, while the pillaring process lead to an increase of S-BET value. Adsorptive and catalytic purification of wastewaters containing dyes was tested using Acid Yellow 99 as a model dye. Na-exchanged bentonite had greater adsorption affinity for dye adsorption than raw bentonite owing to higher S-BET. By organomodification this affinity was enhanced more than 70 times due to transition of bentonite surface from hydrophilic to organophilic. Al,Fe pillared bentonite was proven to be efficient in catalytic wet peroxide oxidation of Acid Yellow 99 dye at room temperature.
AB  - Izvršena je modifikacija i karakterizacija bentonita radi dobijanja materijala za prečišćavanje otpadnih voda. Organo-modifikacija bentonita izvedena je pomoću heksadeciltrimetilamonijum-bromida. Pilareni bentonit dobijen je standardnim postupkom uz ugradnju Al3+ i Fe3+ jona u odnosu 4:1, i korišćen je kao katalizator za oksidativnu razgradnju u prisustvu vodonik-peroksida. Razlike u strukturi polaznog i modifikovanih bentonita utvrđene su rendgeno-strukturnom analizom i fizisorpcijom azota na -196°C. Ispitivano je adsorpciono i katalitičko prečišćavanje otpadnih voda koje sadrže boje, korišćenjem Acid Yellow 99 kao model boje. Izvršeno je poređenje katalitičkih i adsorpiconih svojstava modifikovanih bentonita.
PB  - Assoc Chemists & Chemical Engineers Of Serbia, Belgrade
T2  - Hemijska industrija
T1  - Modified Bentonite as Adsorbent and Catalyst for Purification of Wastewaters Containing Dyes
T1  - Modifikovani bentonit kao adsorbent i katalizator za prečišćavanje otpadnih voda koje sadrže boje
VL  - 64
IS  - 3
SP  - 193
EP  - 199
DO  - 10.2298/HEMIND091221023Z
ER  - 
@article{
author = "Zunic, Marija J. and Milutinović-Nikolić, Aleksandra D. and Jović-Jovičić, Nataša and Banković, Predrag and Mojović, Zorica D. and Manojlović, Dragan D. and Jovanović, Dušan M.",
year = "2010",
abstract = "Modification and characterization of bentonite from location Bogovina, Serbia was performed in order to obtain material applicable in wastewater purification. The  lt 75 mu m bentonite fraction was used in organobentonite synthesis while the  lt 2 mu m bentonite fraction, obtained by hydroseparation was used in pillaring procedure. Organo-modification of bentonite was performed with (1-hexadecyl)trimethylammonium bromide (HDTMA-Br). Pillared bentonite was obtained using standard procedure. Al3+ and Fe3+ were incorporated in pillars in 4:1 ratio and applied as catalyst in catalytic wet peroxide oxidation. Differences in structure of starting and modified bentonites were established by XRD analysis and nitrogen physisorption on -196 degrees C. The (001) smectite peak around 2 theta = 6 degrees shifts during the modification process. The Na-exchange process lowered d(001) from 1.53 nm (2 theta = 5.78 degrees) for starting clay to 1.28 nm (2 theta = 6.92 degrees), but the clay retained its swelling properties. The pillaring process increased and fixed the basal spacing to 1.74 nm. Intercalation of HDTMA ions into smectite structure increased d(001) to 2.00 nm for organobentonite. Specific surface area, S-BET, was affected by particle size and type of modification. The samples with finer bentonite fraction had higher S-BET due to increased smectite content. Na-exchanged bentonite samples had higher S-BET value than starting clay samples of same granulation. Organomodification caused dramatic decrease in S-BET value, while the pillaring process lead to an increase of S-BET value. Adsorptive and catalytic purification of wastewaters containing dyes was tested using Acid Yellow 99 as a model dye. Na-exchanged bentonite had greater adsorption affinity for dye adsorption than raw bentonite owing to higher S-BET. By organomodification this affinity was enhanced more than 70 times due to transition of bentonite surface from hydrophilic to organophilic. Al,Fe pillared bentonite was proven to be efficient in catalytic wet peroxide oxidation of Acid Yellow 99 dye at room temperature., Izvršena je modifikacija i karakterizacija bentonita radi dobijanja materijala za prečišćavanje otpadnih voda. Organo-modifikacija bentonita izvedena je pomoću heksadeciltrimetilamonijum-bromida. Pilareni bentonit dobijen je standardnim postupkom uz ugradnju Al3+ i Fe3+ jona u odnosu 4:1, i korišćen je kao katalizator za oksidativnu razgradnju u prisustvu vodonik-peroksida. Razlike u strukturi polaznog i modifikovanih bentonita utvrđene su rendgeno-strukturnom analizom i fizisorpcijom azota na -196°C. Ispitivano je adsorpciono i katalitičko prečišćavanje otpadnih voda koje sadrže boje, korišćenjem Acid Yellow 99 kao model boje. Izvršeno je poređenje katalitičkih i adsorpiconih svojstava modifikovanih bentonita.",
publisher = "Assoc Chemists & Chemical Engineers Of Serbia, Belgrade",
journal = "Hemijska industrija",
title = "Modified Bentonite as Adsorbent and Catalyst for Purification of Wastewaters Containing Dyes, Modifikovani bentonit kao adsorbent i katalizator za prečišćavanje otpadnih voda koje sadrže boje",
volume = "64",
number = "3",
pages = "193-199",
doi = "10.2298/HEMIND091221023Z"
}
Zunic, M. J., Milutinović-Nikolić, A. D., Jović-Jovičić, N., Banković, P., Mojović, Z. D., Manojlović, D. D.,& Jovanović, D. M.. (2010). Modified Bentonite as Adsorbent and Catalyst for Purification of Wastewaters Containing Dyes. in Hemijska industrija
Assoc Chemists & Chemical Engineers Of Serbia, Belgrade., 64(3), 193-199.
https://doi.org/10.2298/HEMIND091221023Z
Zunic MJ, Milutinović-Nikolić AD, Jović-Jovičić N, Banković P, Mojović ZD, Manojlović DD, Jovanović DM. Modified Bentonite as Adsorbent and Catalyst for Purification of Wastewaters Containing Dyes. in Hemijska industrija. 2010;64(3):193-199.
doi:10.2298/HEMIND091221023Z .
Zunic, Marija J., Milutinović-Nikolić, Aleksandra D., Jović-Jovičić, Nataša, Banković, Predrag, Mojović, Zorica D., Manojlović, Dragan D., Jovanović, Dušan M., "Modified Bentonite as Adsorbent and Catalyst for Purification of Wastewaters Containing Dyes" in Hemijska industrija, 64, no. 3 (2010):193-199,
https://doi.org/10.2298/HEMIND091221023Z . .
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