Maksin, Danijela D.

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orcid::0000-0003-4842-1122
  • Maksin, Danijela D. (2)
  • Maksin, D. (1)
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Author's Bibliography

Removal of Tc-99(VII) by organo-modified bentonite

Milutinović-Nikolić, Aleksandra D.; Maksin, D.; Jovic-Jovicic, N.; Mirković, Marija D.; Stanković, Dalibor; Mojović, Zorica D.; Bankovic, P.

(Elsevier Science Bv, Amsterdam, 2014)

TY  - JOUR
AU  - Milutinović-Nikolić, Aleksandra D.
AU  - Maksin, D.
AU  - Jovic-Jovicic, N.
AU  - Mirković, Marija D.
AU  - Stanković, Dalibor
AU  - Mojović, Zorica D.
AU  - Bankovic, P.
PY  - 2014
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1809
AB  - (99)Technetium is one of the largest components of nuclear waste material. In aqueous solutions Tc-99 is present as the pertechnetate oxoanion, (TcO4-)-Tc-99, which is highly soluble and mobile in groundwater under oxidizing conditions, thus posing a major environmental concern. In this study, a series of organo-modified bentonite clay samples was tested as adsorbents for the removal of radioactive (TcO4-)-Tc-99 from aqueous solution at room temperature. The influence of the hexadecyl trimethylammonium (HDTMA)/bentonite ratio on the adsorption ability of the organobentonites was investigated. It was found that the adsorbent in which the exchangeable cations were only partially substituted with HDTMA showed very low affinity toward pertechnetate. On the other hand, the adsorbents in which the HDTMA loading exceeded the cation exchange capacity (CEC) value had high efficiency. The behavior of such adsorbents was best described by a Freundlich isotherm, while for the sample in which the HDTMA loading was equal to the CEC, the linear adsorption isotherm was the most appropriate. The difference in adsorption performance of several adsorbents was discussed from the point of view of the interlayer arrangement of the HDTMA. The kinetics of pertechnetate adsorption on HDTMA-bentonites was tested and analyzed using different surface reaction- and diffusion-based kinetic models. For all the investigated adsorbents, the most appropriate kinetic model was the pseudo-second-order kinetics model. The obtained adsorption capacities were and HDTMA-bentonites with HDTMA loadings exceeding CEC value should be regarded as very promising adsorbents for the remediation of Tc-99 polluted waters. (C) 2014 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Clay Science
T1  - Removal of Tc-99(VII) by organo-modified bentonite
VL  - 95
SP  - 294
EP  - 302
DO  - 10.1016/j.clay.2014.04.027
ER  - 
@article{
author = "Milutinović-Nikolić, Aleksandra D. and Maksin, D. and Jovic-Jovicic, N. and Mirković, Marija D. and Stanković, Dalibor and Mojović, Zorica D. and Bankovic, P.",
year = "2014",
abstract = "(99)Technetium is one of the largest components of nuclear waste material. In aqueous solutions Tc-99 is present as the pertechnetate oxoanion, (TcO4-)-Tc-99, which is highly soluble and mobile in groundwater under oxidizing conditions, thus posing a major environmental concern. In this study, a series of organo-modified bentonite clay samples was tested as adsorbents for the removal of radioactive (TcO4-)-Tc-99 from aqueous solution at room temperature. The influence of the hexadecyl trimethylammonium (HDTMA)/bentonite ratio on the adsorption ability of the organobentonites was investigated. It was found that the adsorbent in which the exchangeable cations were only partially substituted with HDTMA showed very low affinity toward pertechnetate. On the other hand, the adsorbents in which the HDTMA loading exceeded the cation exchange capacity (CEC) value had high efficiency. The behavior of such adsorbents was best described by a Freundlich isotherm, while for the sample in which the HDTMA loading was equal to the CEC, the linear adsorption isotherm was the most appropriate. The difference in adsorption performance of several adsorbents was discussed from the point of view of the interlayer arrangement of the HDTMA. The kinetics of pertechnetate adsorption on HDTMA-bentonites was tested and analyzed using different surface reaction- and diffusion-based kinetic models. For all the investigated adsorbents, the most appropriate kinetic model was the pseudo-second-order kinetics model. The obtained adsorption capacities were and HDTMA-bentonites with HDTMA loadings exceeding CEC value should be regarded as very promising adsorbents for the remediation of Tc-99 polluted waters. (C) 2014 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Clay Science",
title = "Removal of Tc-99(VII) by organo-modified bentonite",
volume = "95",
pages = "294-302",
doi = "10.1016/j.clay.2014.04.027"
}
Milutinović-Nikolić, A. D., Maksin, D., Jovic-Jovicic, N., Mirković, M. D., Stanković, D., Mojović, Z. D.,& Bankovic, P.. (2014). Removal of Tc-99(VII) by organo-modified bentonite. in Applied Clay Science
Elsevier Science Bv, Amsterdam., 95, 294-302.
https://doi.org/10.1016/j.clay.2014.04.027
Milutinović-Nikolić AD, Maksin D, Jovic-Jovicic N, Mirković MD, Stanković D, Mojović ZD, Bankovic P. Removal of Tc-99(VII) by organo-modified bentonite. in Applied Clay Science. 2014;95:294-302.
doi:10.1016/j.clay.2014.04.027 .
Milutinović-Nikolić, Aleksandra D., Maksin, D., Jovic-Jovicic, N., Mirković, Marija D., Stanković, Dalibor, Mojović, Zorica D., Bankovic, P., "Removal of Tc-99(VII) by organo-modified bentonite" in Applied Clay Science, 95 (2014):294-302,
https://doi.org/10.1016/j.clay.2014.04.027 . .
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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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Adsorptive Removal of Technetium-99 Using Macroporous Poly(GMA-co-EGDMA) Modified with Diethylene Triamine

Hercigonja, Radmila V.; Maksin, Danijela D.; Nastasović, Aleksandra B.; Trifunović, Snežana S.; Glodic, Pavle B.; Onjia, Antonije E.

(Wiley-Blackwell, Malden, 2012)

TY  - JOUR
AU  - Hercigonja, Radmila V.
AU  - Maksin, Danijela D.
AU  - Nastasović, Aleksandra B.
AU  - Trifunović, Snežana S.
AU  - Glodic, Pavle B.
AU  - Onjia, Antonije E.
PY  - 2012
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1218
AB  - dThe possibility of sorption of technetium-99 in the form of pertechnetate anion (TcO(4)(-)) and the sorption kinetics for removing TcO(4)(-) from aqueous solution by chelating polymers based on glycidyl methacrylate (GMA) were investigated. Two samples of macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (PGME), with different amount of the crosslinker (ethylene glycol dimethacrylate, EGDMA), were synthesized by suspension copolymerization and functionalized with diethylene triamine (deta). We propose that nonspecific sorption of pertechnetate anion via electrostatic interactions takes place at the protonated amino groups of macroporous crosslinked copolymer. The results of batch experiments per-formed at pH 1-14 showed fast sorption kinetics for removing TcO(4)(-) by amino-functionalized PGME-deta in a wide range of pH, that is, from 1.0 to 9.0. Almost complete removal of TcO(4)(-) (91-98%) was reached within 180 min in the stated pH range (1.0-9.0), with the sorption half-times of under 25 min. The partitioning coefficients of linear adsorption isotherms, with 180-min equilibrium time, reach the high values of 2130 mL g(-1) and 1698 mL g(-1) for the two samples of synthesized PGME-deta. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 1273-1282, 2012
PB  - Wiley-Blackwell, Malden
T2  - Journal of Applied Polymer Science
T1  - Adsorptive Removal of Technetium-99 Using Macroporous Poly(GMA-co-EGDMA) Modified with Diethylene Triamine
VL  - 123
IS  - 2
SP  - 1273
EP  - 1282
DO  - 10.1002/app.34693
ER  - 
@article{
author = "Hercigonja, Radmila V. and Maksin, Danijela D. and Nastasović, Aleksandra B. and Trifunović, Snežana S. and Glodic, Pavle B. and Onjia, Antonije E.",
year = "2012",
abstract = "dThe possibility of sorption of technetium-99 in the form of pertechnetate anion (TcO(4)(-)) and the sorption kinetics for removing TcO(4)(-) from aqueous solution by chelating polymers based on glycidyl methacrylate (GMA) were investigated. Two samples of macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (PGME), with different amount of the crosslinker (ethylene glycol dimethacrylate, EGDMA), were synthesized by suspension copolymerization and functionalized with diethylene triamine (deta). We propose that nonspecific sorption of pertechnetate anion via electrostatic interactions takes place at the protonated amino groups of macroporous crosslinked copolymer. The results of batch experiments per-formed at pH 1-14 showed fast sorption kinetics for removing TcO(4)(-) by amino-functionalized PGME-deta in a wide range of pH, that is, from 1.0 to 9.0. Almost complete removal of TcO(4)(-) (91-98%) was reached within 180 min in the stated pH range (1.0-9.0), with the sorption half-times of under 25 min. The partitioning coefficients of linear adsorption isotherms, with 180-min equilibrium time, reach the high values of 2130 mL g(-1) and 1698 mL g(-1) for the two samples of synthesized PGME-deta. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 1273-1282, 2012",
publisher = "Wiley-Blackwell, Malden",
journal = "Journal of Applied Polymer Science",
title = "Adsorptive Removal of Technetium-99 Using Macroporous Poly(GMA-co-EGDMA) Modified with Diethylene Triamine",
volume = "123",
number = "2",
pages = "1273-1282",
doi = "10.1002/app.34693"
}
Hercigonja, R. V., Maksin, D. D., Nastasović, A. B., Trifunović, S. S., Glodic, P. B.,& Onjia, A. E.. (2012). Adsorptive Removal of Technetium-99 Using Macroporous Poly(GMA-co-EGDMA) Modified with Diethylene Triamine. in Journal of Applied Polymer Science
Wiley-Blackwell, Malden., 123(2), 1273-1282.
https://doi.org/10.1002/app.34693
Hercigonja RV, Maksin DD, Nastasović AB, Trifunović SS, Glodic PB, Onjia AE. Adsorptive Removal of Technetium-99 Using Macroporous Poly(GMA-co-EGDMA) Modified with Diethylene Triamine. in Journal of Applied Polymer Science. 2012;123(2):1273-1282.
doi:10.1002/app.34693 .
Hercigonja, Radmila V., Maksin, Danijela D., Nastasović, Aleksandra B., Trifunović, Snežana S., Glodic, Pavle B., Onjia, Antonije E., "Adsorptive Removal of Technetium-99 Using Macroporous Poly(GMA-co-EGDMA) Modified with Diethylene Triamine" in Journal of Applied Polymer Science, 123, no. 2 (2012):1273-1282,
https://doi.org/10.1002/app.34693 . .
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