TY  - JOUR
AU  - Dolić, Maja B.
AU  - Rajaković-Ognjanović, Vladana
AU  - Marković, Jelena P.
AU  - Jankovic-Mandić, Ljiljana J.
AU  - Mitrić, Miodrag N.
AU  - Onjia, Antonije
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/705
AB  - Natural minerals, such as quartz, clinoptilolite and calcite, are useful as sorbents for various applications, but their content of heavy metals ions is the most problematic obstacle to their application. Before their (re)use, the minerals must be purified. In this work, the subject was desorption of lead from a natural multi-component mineral sample consisting of a mixture of silicates (mainly quartz and clinoptilolite) and calcite formations. Besides deionized water, different extraction solutions were tested: NaCl, KCl, CaCl2, MgCl2, HCl, HNO3, EDTA, EDTA/HCl, EDTA/NaOAc-HOAc, HOAc, NaOAc and NaOAc-HOAc. Several parameters were varied in order to obtain the optimal conditions for the desorption process: the concentration of the extraction solution, the ratio of the mass of the sample and volume of the extractant, and the pH value of the suspension. The best purification effect in one desorption cycle was obtained when 0.1 M EDTA, at a pH value of 3.5 (0.2 M EDTA was mixed with 0.01 M acetic buffer, at pH value 3.0, in ratio 1:1) was applied. Sequential extraction (5 consecutive iterations) was performed to provide a more efficient purification process. The lead content (58.20 mg/kg) was decreased by: 20% (using HOAc), 21% (using EDTA) and by more than 50% (using EDTA/NaOAc-HOAc). The pH value and conductivity were measured at all critical points to clarify the mechanism of the desorption process. The formation of Pb-EDTA complex is the result of two parallel phenomena, complexing and ion-exchange. An enhanced adsorption capacity and an improved microelement profile for the purified samples were also attained. The mineralogical and radiochemical performances of the sample were determined by the X-ray diffraction and gamma spectrometry techniques. Microelement analyses of the native and purified samples were performed by inductively coupled plasma optical emission spectroscopy (ICP-OES).
PB  - Elsevier B.V.
T2  - Applied Surface Science
T1  - The effect of different extractants on lead desorption from a natural mineral
EP  - 231
SP  - 221
VL  - 324
DO  - 10.1016/j.apsusc.2014.10.112
ER  - 

@article{
author = "Dolić, Maja B. and Rajaković-Ognjanović, Vladana and Marković, Jelena P. and Jankovic-Mandić, Ljiljana J. and Mitrić, Miodrag N. and Onjia, Antonije and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Natural minerals, such as quartz, clinoptilolite and calcite, are useful as sorbents for various applications, but their content of heavy metals ions is the most problematic obstacle to their application. Before their (re)use, the minerals must be purified. In this work, the subject was desorption of lead from a natural multi-component mineral sample consisting of a mixture of silicates (mainly quartz and clinoptilolite) and calcite formations. Besides deionized water, different extraction solutions were tested: NaCl, KCl, CaCl2, MgCl2, HCl, HNO3, EDTA, EDTA/HCl, EDTA/NaOAc-HOAc, HOAc, NaOAc and NaOAc-HOAc. Several parameters were varied in order to obtain the optimal conditions for the desorption process: the concentration of the extraction solution, the ratio of the mass of the sample and volume of the extractant, and the pH value of the suspension. The best purification effect in one desorption cycle was obtained when 0.1 M EDTA, at a pH value of 3.5 (0.2 M EDTA was mixed with 0.01 M acetic buffer, at pH value 3.0, in ratio 1:1) was applied. Sequential extraction (5 consecutive iterations) was performed to provide a more efficient purification process. The lead content (58.20 mg/kg) was decreased by: 20% (using HOAc), 21% (using EDTA) and by more than 50% (using EDTA/NaOAc-HOAc). The pH value and conductivity were measured at all critical points to clarify the mechanism of the desorption process. The formation of Pb-EDTA complex is the result of two parallel phenomena, complexing and ion-exchange. An enhanced adsorption capacity and an improved microelement profile for the purified samples were also attained. The mineralogical and radiochemical performances of the sample were determined by the X-ray diffraction and gamma spectrometry techniques. Microelement analyses of the native and purified samples were performed by inductively coupled plasma optical emission spectroscopy (ICP-OES).",
publisher = "Elsevier B.V.",
journal = "Applied Surface Science",
title = "The effect of different extractants on lead desorption from a natural mineral",
pages = "231-221",
volume = "324",
doi = "10.1016/j.apsusc.2014.10.112"
}

Dolić, M. B., Rajaković-Ognjanović, V., Marković, J. P., Jankovic-Mandić, L. J., Mitrić, M. N., Onjia, A.,& Rajaković, L. V.. (2015). The effect of different extractants on lead desorption from a natural mineral. in Applied Surface Science
Elsevier B.V.., 324, 221-231.
https://doi.org/10.1016/j.apsusc.2014.10.112

Dolić MB, Rajaković-Ognjanović V, Marković JP, Jankovic-Mandić LJ, Mitrić MN, Onjia A, Rajaković LV. The effect of different extractants on lead desorption from a natural mineral. in Applied Surface Science. 2015;324:221-231.
doi:10.1016/j.apsusc.2014.10.112 .

Dolić, Maja B., Rajaković-Ognjanović, Vladana, Marković, Jelena P., Jankovic-Mandić, Ljiljana J., Mitrić, Miodrag N., Onjia, Antonije, Rajaković, Ljubinka V., "The effect of different extractants on lead desorption from a natural mineral" in Applied Surface Science, 324 (2015):221-231,
https://doi.org/10.1016/j.apsusc.2014.10.112 . .

TY  - JOUR
AU  - Mirković, Maja
AU  - Lekić, Branislava
AU  - Rajaković-Ognjanović, Vladana
AU  - Jankovic-Mandić, Ljiljana J.
AU  - Jović, Mihajlo
AU  - Onjia, Antonije
AU  - Rajaković, Ljubinka V.
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1024
T2  - Ecologica
T1  - Mogućnosti primene sorbenata aktiviranih jonima metala za mikrobiološko precišćavanje vode
EP  - 795
IS  - 76
SP  - 791
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1024
ER  - 

@article{
author = "Mirković, Maja and Lekić, Branislava and Rajaković-Ognjanović, Vladana and Jankovic-Mandić, Ljiljana J. and Jović, Mihajlo and Onjia, Antonije and Rajaković, Ljubinka V.",
year = "2014",
journal = "Ecologica",
title = "Mogućnosti primene sorbenata aktiviranih jonima metala za mikrobiološko precišćavanje vode",
pages = "795-791",
number = "76",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1024"
}

Mirković, M., Lekić, B., Rajaković-Ognjanović, V., Jankovic-Mandić, L. J., Jović, M., Onjia, A.,& Rajaković, L. V.. (2014). Mogućnosti primene sorbenata aktiviranih jonima metala za mikrobiološko precišćavanje vode. in Ecologica, 21(76), 791-795.
https://hdl.handle.net/21.15107/rcub_grafar_1024

Mirković M, Lekić B, Rajaković-Ognjanović V, Jankovic-Mandić LJ, Jović M, Onjia A, Rajaković LV. Mogućnosti primene sorbenata aktiviranih jonima metala za mikrobiološko precišćavanje vode. in Ecologica. 2014;21(76):791-795.
https://hdl.handle.net/21.15107/rcub_grafar_1024 .

Mirković, Maja, Lekić, Branislava, Rajaković-Ognjanović, Vladana, Jankovic-Mandić, Ljiljana J., Jović, Mihajlo, Onjia, Antonije, Rajaković, Ljubinka V., "Mogućnosti primene sorbenata aktiviranih jonima metala za mikrobiološko precišćavanje vode" in Ecologica, 21, no. 76 (2014):791-795,
https://hdl.handle.net/21.15107/rcub_grafar_1024 .