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 . .

TY  - JOUR
AU  - Jovic-Jovicic, N.
AU  - Milutinović-Nikolić, Aleksandra D.
AU  - Bankovic, P.
AU  - Dojčinović, Biljana P.
AU  - Nedic, B.
AU  - Gržetić, Ivan
AU  - Jovanovic, D.
PY  - 2010
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1083
AB  - In this paper partial and complete substitution of cations in the interlayer region of clay with different amounts of two aliphatic ammonium cations was performed with aim of synthesis of organobentonites with multipurpose adsorption properties. Domestic clay from Bogovina was submitted according to a common procedure used for the obtention of organobentonite, which comprises the following steps: grinding, sieving, Na-exchange, cation exchange and drying. The samples were characterized by X-ray diffraction and infrared spectroscopy. The incorporation of surfactant molecules into smectite structure lead to constant increase of d(001) basal spacing. IR absorption bands assigned to methyl and methylene vibrations increased with the increase of surfactant/bentonite ratio and length of aliphatic chain in surfactant molecules. Adsorptive properties of the obtained materials were in accordance with their organophylicity: the adsorption of organic dye increased while the rate of removal of Pb2+ by adsorption decreased.
PB  - Polish Acad Sciences Inst Physics, Warsaw
T2  - Acta Physica Polonica. Series A: General Physics, Physics of Condensed Matter, Optics and Quantum El
T1  - Synthesis, Characterization and Adsorptive Properties of Organobentonites
VL  - 117
IS  - 5
SP  - 849
EP  - 854
DO  - 10.12693/APhysPolA.117.849
ER  - 

@article{
author = "Jovic-Jovicic, N. and Milutinović-Nikolić, Aleksandra D. and Bankovic, P. and Dojčinović, Biljana P. and Nedic, B. and Gržetić, Ivan and Jovanovic, D.",
year = "2010",
abstract = "In this paper partial and complete substitution of cations in the interlayer region of clay with different amounts of two aliphatic ammonium cations was performed with aim of synthesis of organobentonites with multipurpose adsorption properties. Domestic clay from Bogovina was submitted according to a common procedure used for the obtention of organobentonite, which comprises the following steps: grinding, sieving, Na-exchange, cation exchange and drying. The samples were characterized by X-ray diffraction and infrared spectroscopy. The incorporation of surfactant molecules into smectite structure lead to constant increase of d(001) basal spacing. IR absorption bands assigned to methyl and methylene vibrations increased with the increase of surfactant/bentonite ratio and length of aliphatic chain in surfactant molecules. Adsorptive properties of the obtained materials were in accordance with their organophylicity: the adsorption of organic dye increased while the rate of removal of Pb2+ by adsorption decreased.",
publisher = "Polish Acad Sciences Inst Physics, Warsaw",
journal = "Acta Physica Polonica. Series A: General Physics, Physics of Condensed Matter, Optics and Quantum El",
title = "Synthesis, Characterization and Adsorptive Properties of Organobentonites",
volume = "117",
number = "5",
pages = "849-854",
doi = "10.12693/APhysPolA.117.849"
}

Jovic-Jovicic, N., Milutinović-Nikolić, A. D., Bankovic, P., Dojčinović, B. P., Nedic, B., Gržetić, I.,& Jovanovic, D.. (2010). Synthesis, Characterization and Adsorptive Properties of Organobentonites. in Acta Physica Polonica. Series A: General Physics, Physics of Condensed Matter, Optics and Quantum El
Polish Acad Sciences Inst Physics, Warsaw., 117(5), 849-854.
https://doi.org/10.12693/APhysPolA.117.849

Jovic-Jovicic N, Milutinović-Nikolić AD, Bankovic P, Dojčinović BP, Nedic B, Gržetić I, Jovanovic D. Synthesis, Characterization and Adsorptive Properties of Organobentonites. in Acta Physica Polonica. Series A: General Physics, Physics of Condensed Matter, Optics and Quantum El. 2010;117(5):849-854.
doi:10.12693/APhysPolA.117.849 .

Jovic-Jovicic, N., Milutinović-Nikolić, Aleksandra D., Bankovic, P., Dojčinović, Biljana P., Nedic, B., Gržetić, Ivan, Jovanovic, D., "Synthesis, Characterization and Adsorptive Properties of Organobentonites" in Acta Physica Polonica. Series A: General Physics, Physics of Condensed Matter, Optics and Quantum El, 117, no. 5 (2010):849-854,
https://doi.org/10.12693/APhysPolA.117.849 . .

TY  - JOUR
AU  - Jovic-Jovicic, N.
AU  - Milutinović-Nikolić, Aleksandra D.
AU  - Bankovic, P.
AU  - Mojović, Zorica D.
AU  - Zunic, M.
AU  - Gržetić, Ivan
AU  - Jovanovic, D.
PY  - 2010
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1054
AB  - Partial substitution of the interlayer cations of a local bentonite (Bogovina) by hexadecyl trimethylammonium ions (HDTMA) was performed to prepare adsorbents able to simultaneously adsorb toxic metal cations and organic pollutants. Acid Orange 10 adsorption increased with increasing HDTMA addition, while the adsorption of Pb2+ decreased with increasing organophilicity. The adsorption of the dye and Pb2+ and their mixture onto Na-rich bentonite and HDTMA-bentonites, regardless of adsorbents' organophilicity, obeyed the pseudo-second-order kinetics model. (C) 2009 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Clay Science
T1  - Organo-inorganic bentonite for simultaneous adsorption of Acid Orange 10 and lead ions
VL  - 47
IS  - 3-4
SP  - 452
EP  - 456
DO  - 10.1016/j.clay.2009.11.005
ER  - 

@article{
author = "Jovic-Jovicic, N. and Milutinović-Nikolić, Aleksandra D. and Bankovic, P. and Mojović, Zorica D. and Zunic, M. and Gržetić, Ivan and Jovanovic, D.",
year = "2010",
abstract = "Partial substitution of the interlayer cations of a local bentonite (Bogovina) by hexadecyl trimethylammonium ions (HDTMA) was performed to prepare adsorbents able to simultaneously adsorb toxic metal cations and organic pollutants. Acid Orange 10 adsorption increased with increasing HDTMA addition, while the adsorption of Pb2+ decreased with increasing organophilicity. The adsorption of the dye and Pb2+ and their mixture onto Na-rich bentonite and HDTMA-bentonites, regardless of adsorbents' organophilicity, obeyed the pseudo-second-order kinetics model. (C) 2009 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Clay Science",
title = "Organo-inorganic bentonite for simultaneous adsorption of Acid Orange 10 and lead ions",
volume = "47",
number = "3-4",
pages = "452-456",
doi = "10.1016/j.clay.2009.11.005"
}

Jovic-Jovicic, N., Milutinović-Nikolić, A. D., Bankovic, P., Mojović, Z. D., Zunic, M., Gržetić, I.,& Jovanovic, D.. (2010). Organo-inorganic bentonite for simultaneous adsorption of Acid Orange 10 and lead ions. in Applied Clay Science
Elsevier Science Bv, Amsterdam., 47(3-4), 452-456.
https://doi.org/10.1016/j.clay.2009.11.005

Jovic-Jovicic N, Milutinović-Nikolić AD, Bankovic P, Mojović ZD, Zunic M, Gržetić I, Jovanovic D. Organo-inorganic bentonite for simultaneous adsorption of Acid Orange 10 and lead ions. in Applied Clay Science. 2010;47(3-4):452-456.
doi:10.1016/j.clay.2009.11.005 .

Jovic-Jovicic, N., Milutinović-Nikolić, Aleksandra D., Bankovic, P., Mojović, Zorica D., Zunic, M., Gržetić, Ivan, Jovanovic, D., "Organo-inorganic bentonite for simultaneous adsorption of Acid Orange 10 and lead ions" in Applied Clay Science, 47, no. 3-4 (2010):452-456,
https://doi.org/10.1016/j.clay.2009.11.005 . .