TY  - JOUR
AU  - Lazarević, Slavica S.
AU  - Mihajlović-Kostić, Marija T.
AU  - Janković-Častvan, Ivona M.
AU  - Janaćković, Đorđe T.
AU  - Petrović, Rada D.
PY  - 2024
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7434
AB  - The surfaces of natural (NZ) and zeolite/iron oxyhydroxide composite (ZFe) samples were analysed by means of inverse gas chromatography (IGC) using the adsorption data of organic non-polar and polar probes, in the infinite and finite-dilution regimes, in the temperature range 483-513 K. The dispersive components of the free energy of adsorption, γS, determined by the Gray method, decreased with increasing temperature for both zeolites. The specific interactions were characterised by the specific free adsorption energy change, ΔGaS, the specific enthalpy change of adsorption, ΔHaS, as well as the donor and acceptor interaction parameters (KA, KD) and the basic character of the NZ and ZFe was evidenced. The adsorption isotherms of n-hexane, benzene, chloroform and tetrahydrofuran (THF) were determined under finite surface coverage and used to estimate the specific surface area and the adsorption energy distribution. The adsorption capacity of the ZFe was higher than for NZ for all the investigated adsorbates. The specific surface areas and pore size distributions were also determined using nitrogen adsorption-desorption isotherms, i.e., the BET method. It was observed that the nature of the adsorbate and the properties of the solid surface of the initial and modified samples governed the uptake of adsorbates.
AB  - Применом инверзне гасне хроматографије, испитана су површинска својства природног зеолита (NZ) и композита зеолита и гвожђе-оксихидроксида (ZFe), коришћењем поларних и неполарних проба у условима нулте и коначне прекривености у температурном опсегу 483–513 K. Вредности дисперзивне компоненте слободне енергије адсорпције, γS, одређене методом Греја, опадају са порастом температуре за оба зеолита. Одређивањем промене специфичне слободне енергије адсорпције, ΔGa S, и промене специфичне енталпије адсорпције, ΔHa S, које одговарају кисело/базним интеракцијама на чврстој површини, одређени су и акцепторски и донорски параметри (KА и KD) на основу којих је утврђено да су површине узорака NZ и ZFe базног карактера. На основу добијених адсорпционих изотерми за n-хексан, бензен, хлороформ и тетрахидрофуран, применом инверзне гасне хроматографије у условима коначне прекривености, израчунате су вредности специфичне површине као и расподела адсорпционе енергије. Капацитет адсорпције узорка ZFe је био већи у односу на капацитета узорка NZ, за све испитане адсорбенте. Специфична површина узорака као и расподела величине мезопора одређени су применом адсорпионе/десорпционе изотерме за гасовити азот, односно применом BET методе. Закључено је да су природа адсорбата и површинска својства адсорбената главни фактори који одређују капацитет адсорпције.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - An inverse gas chromatography study of the adsorption of organics on zeolite and zeolite/iron oxyhydroxide composite at the infinite and finite surface coverage
T1  - Примена инверзне гасне хроматографије при нултој и коначној прекривености за испитивање адсорпције органских мoлекула на зеолиту и композиту зеолита и гвожђе-оксихидроксида
EP  - 397
IS  - 3
SP  - 383
VL  - 89
DO  - 10.2298/JSC230908093L
ER  - 

@article{
author = "Lazarević, Slavica S. and Mihajlović-Kostić, Marija T. and Janković-Častvan, Ivona M. and Janaćković, Đorđe T. and Petrović, Rada D.",
year = "2024",
abstract = "The surfaces of natural (NZ) and zeolite/iron oxyhydroxide composite (ZFe) samples were analysed by means of inverse gas chromatography (IGC) using the adsorption data of organic non-polar and polar probes, in the infinite and finite-dilution regimes, in the temperature range 483-513 K. The dispersive components of the free energy of adsorption, γS, determined by the Gray method, decreased with increasing temperature for both zeolites. The specific interactions were characterised by the specific free adsorption energy change, ΔGaS, the specific enthalpy change of adsorption, ΔHaS, as well as the donor and acceptor interaction parameters (KA, KD) and the basic character of the NZ and ZFe was evidenced. The adsorption isotherms of n-hexane, benzene, chloroform and tetrahydrofuran (THF) were determined under finite surface coverage and used to estimate the specific surface area and the adsorption energy distribution. The adsorption capacity of the ZFe was higher than for NZ for all the investigated adsorbates. The specific surface areas and pore size distributions were also determined using nitrogen adsorption-desorption isotherms, i.e., the BET method. It was observed that the nature of the adsorbate and the properties of the solid surface of the initial and modified samples governed the uptake of adsorbates., Применом инверзне гасне хроматографије, испитана су површинска својства природног зеолита (NZ) и композита зеолита и гвожђе-оксихидроксида (ZFe), коришћењем поларних и неполарних проба у условима нулте и коначне прекривености у температурном опсегу 483–513 K. Вредности дисперзивне компоненте слободне енергије адсорпције, γS, одређене методом Греја, опадају са порастом температуре за оба зеолита. Одређивањем промене специфичне слободне енергије адсорпције, ΔGa S, и промене специфичне енталпије адсорпције, ΔHa S, које одговарају кисело/базним интеракцијама на чврстој површини, одређени су и акцепторски и донорски параметри (KА и KD) на основу којих је утврђено да су површине узорака NZ и ZFe базног карактера. На основу добијених адсорпционих изотерми за n-хексан, бензен, хлороформ и тетрахидрофуран, применом инверзне гасне хроматографије у условима коначне прекривености, израчунате су вредности специфичне површине као и расподела адсорпционе енергије. Капацитет адсорпције узорка ZFe је био већи у односу на капацитета узорка NZ, за све испитане адсорбенте. Специфична површина узорака као и расподела величине мезопора одређени су применом адсорпионе/десорпционе изотерме за гасовити азот, односно применом BET методе. Закључено је да су природа адсорбата и површинска својства адсорбената главни фактори који одређују капацитет адсорпције.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "An inverse gas chromatography study of the adsorption of organics on zeolite and zeolite/iron oxyhydroxide composite at the infinite and finite surface coverage, Примена инверзне гасне хроматографије при нултој и коначној прекривености за испитивање адсорпције органских мoлекула на зеолиту и композиту зеолита и гвожђе-оксихидроксида",
pages = "397-383",
number = "3",
volume = "89",
doi = "10.2298/JSC230908093L"
}

Lazarević, S. S., Mihajlović-Kostić, M. T., Janković-Častvan, I. M., Janaćković, Đ. T.,& Petrović, R. D.. (2024). An inverse gas chromatography study of the adsorption of organics on zeolite and zeolite/iron oxyhydroxide composite at the infinite and finite surface coverage. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 89(3), 383-397.
https://doi.org/10.2298/JSC230908093L

Lazarević SS, Mihajlović-Kostić MT, Janković-Častvan IM, Janaćković ĐT, Petrović RD. An inverse gas chromatography study of the adsorption of organics on zeolite and zeolite/iron oxyhydroxide composite at the infinite and finite surface coverage. in Journal of the Serbian Chemical Society. 2024;89(3):383-397.
doi:10.2298/JSC230908093L .

Lazarević, Slavica S., Mihajlović-Kostić, Marija T., Janković-Častvan, Ivona M., Janaćković, Đorđe T., Petrović, Rada D., "An inverse gas chromatography study of the adsorption of organics on zeolite and zeolite/iron oxyhydroxide composite at the infinite and finite surface coverage" in Journal of the Serbian Chemical Society, 89, no. 3 (2024):383-397,
https://doi.org/10.2298/JSC230908093L . .

TY  - JOUR
AU  - Jovanović, Aleksandar
AU  - Stevanović, Marija
AU  - Barudžija, Tanja
AU  - Cvijetić, Ilija
AU  - Lazarević, Slavica
AU  - Tomašević, Anđelka
AU  - Marinković, Aleksandar
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6611
AB  - This study focuses on establishing an efficient two-step technology, which includes: (1) consecutive adsorption-desorption, using cellulose-based membranes, bCells, and (2) photocatalytic degradation of the fungicide thiophanate-methyl (TPM), using synthesized Ag-P25 and Ce-P25 catalysts. The catalysts, obtained by controlled deposition of Ag2O/Ag and CeO2 onto P25 TiO2 carrier (Degussa), were characterized using ATR-FTIR, XRPD, BET, FESEM, HRTEM, HAADF-EDS and UV–DRS techniques. In order to establish a feasible purification technology, preconcentration of TPM was performed by adsorption, achieving 75.5 and 92.9 mg/g of TPM removal using bCell-EpL and bCell–EpL–TA membranes, respectively, followed by efficient desorption (> 95%) that provided acceptable TPM concentration for photodegradation experiments. Under optimal conditions (0.07 g/L of both catalysts), complete degradation of TPM (5 mg/L) occurred within 2 h, compared to 4 h for the base TiO2 P25. Measurements of quantum yield and the results of HPLC-MS analysis, alongside DFT calculation, assisted in understanding the TPM degradation pathways. New degradation products were detected and proposed from HPLC–MS analysis. Embryotoxic assays, performed on zebrafish (Danio rerio), applied to estimate the toxicity evolution of time-dependent generated TPM degradation products, showed low embryotoxic potential. Chemical oxygen demand (26 mg O2/L) confirmed low ecotoxicological pressure of effluent water.
PB  - Institution of Chemical Engineers
T2  - Process Safety and Environmental Protection
T1  - Advanced technology for photocatalytic degradation of thiophanate-methyl: Degradation pathways, DFT calculations and embryotoxic potential
EP  - 443
SP  - 423
VL  - 178
DO  - 10.1016/j.psep.2023.08.054
ER  - 

@article{
author = "Jovanović, Aleksandar and Stevanović, Marija and Barudžija, Tanja and Cvijetić, Ilija and Lazarević, Slavica and Tomašević, Anđelka and Marinković, Aleksandar",
year = "2023",
abstract = "This study focuses on establishing an efficient two-step technology, which includes: (1) consecutive adsorption-desorption, using cellulose-based membranes, bCells, and (2) photocatalytic degradation of the fungicide thiophanate-methyl (TPM), using synthesized Ag-P25 and Ce-P25 catalysts. The catalysts, obtained by controlled deposition of Ag2O/Ag and CeO2 onto P25 TiO2 carrier (Degussa), were characterized using ATR-FTIR, XRPD, BET, FESEM, HRTEM, HAADF-EDS and UV–DRS techniques. In order to establish a feasible purification technology, preconcentration of TPM was performed by adsorption, achieving 75.5 and 92.9 mg/g of TPM removal using bCell-EpL and bCell–EpL–TA membranes, respectively, followed by efficient desorption (> 95%) that provided acceptable TPM concentration for photodegradation experiments. Under optimal conditions (0.07 g/L of both catalysts), complete degradation of TPM (5 mg/L) occurred within 2 h, compared to 4 h for the base TiO2 P25. Measurements of quantum yield and the results of HPLC-MS analysis, alongside DFT calculation, assisted in understanding the TPM degradation pathways. New degradation products were detected and proposed from HPLC–MS analysis. Embryotoxic assays, performed on zebrafish (Danio rerio), applied to estimate the toxicity evolution of time-dependent generated TPM degradation products, showed low embryotoxic potential. Chemical oxygen demand (26 mg O2/L) confirmed low ecotoxicological pressure of effluent water.",
publisher = "Institution of Chemical Engineers",
journal = "Process Safety and Environmental Protection",
title = "Advanced technology for photocatalytic degradation of thiophanate-methyl: Degradation pathways, DFT calculations and embryotoxic potential",
pages = "443-423",
volume = "178",
doi = "10.1016/j.psep.2023.08.054"
}

Jovanović, A., Stevanović, M., Barudžija, T., Cvijetić, I., Lazarević, S., Tomašević, A.,& Marinković, A.. (2023). Advanced technology for photocatalytic degradation of thiophanate-methyl: Degradation pathways, DFT calculations and embryotoxic potential. in Process Safety and Environmental Protection
Institution of Chemical Engineers., 178, 423-443.
https://doi.org/10.1016/j.psep.2023.08.054

Jovanović A, Stevanović M, Barudžija T, Cvijetić I, Lazarević S, Tomašević A, Marinković A. Advanced technology for photocatalytic degradation of thiophanate-methyl: Degradation pathways, DFT calculations and embryotoxic potential. in Process Safety and Environmental Protection. 2023;178:423-443.
doi:10.1016/j.psep.2023.08.054 .

Jovanović, Aleksandar, Stevanović, Marija, Barudžija, Tanja, Cvijetić, Ilija, Lazarević, Slavica, Tomašević, Anđelka, Marinković, Aleksandar, "Advanced technology for photocatalytic degradation of thiophanate-methyl: Degradation pathways, DFT calculations and embryotoxic potential" in Process Safety and Environmental Protection, 178 (2023):423-443,
https://doi.org/10.1016/j.psep.2023.08.054 . .

TY  - JOUR
AU  - Petrović, Rada
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Matić, Tamara
AU  - Milivojević, Marko
AU  - Milošević, Dragana
AU  - Veljović, Đorđe
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5263
AB  - Kaolinite/illite (KUb) and sepiolite (SEP) clays were used to study Cr(III) adsorption removal from aqueous solutions so that they could be utilized after saturation for ceramic manufacturing. SEP had a larger specific surface area and a higher PZC than KUb. The removal of Cr(III) was evaluated using a batch equilibration procedure at pHi = 4 and pHi = 6. Fast removal kinetics were observed for both clays. Maximum removal capacity was determined by changing the concentration of Cr(III) while keeping the concentration of clay constant and by altering the amount of clay while keeping the concentration of Cr(III) constant. In all situations, SEP had greater capacity than KUb, and capacity was greater for both clays at higher pHi. Not only did the pHi impact the removal capacity and efficiency, but so did the pH during adsorption and the initial concentration of Cr(III). Because of the higher PZC, the pHf for SEP was higher for the same pHi. The higher the pH and Cr(III) concentration, the higher the probability of Cr(OH)3 precipitation and the higher the removal capacity. Dried saturated clays were uniaxially pressed and sintered at 1000 °C for 2 h. The densities of the sintered materials were nearly identical to those of pure clay-based materials, but the compressive strengths were higher, which is significant for the use of saturated clays as raw materials in ceramic manufacturing. Leaching of Cr from SEP-based material was significantly higher than from KUb-based material probably due to the presence of CaCO3 in the SEP.
PB  - Elsevier
T2  - Applied  Clay Sciences
T1  - Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing
SP  - 106747
VL  - 231
DO  - 10.1016/j.clay.2022.106747
ER  - 

@article{
author = "Petrović, Rada and Lazarević, Slavica and Janković-Častvan, Ivona and Matić, Tamara and Milivojević, Marko and Milošević, Dragana and Veljović, Đorđe",
year = "2023",
abstract = "Kaolinite/illite (KUb) and sepiolite (SEP) clays were used to study Cr(III) adsorption removal from aqueous solutions so that they could be utilized after saturation for ceramic manufacturing. SEP had a larger specific surface area and a higher PZC than KUb. The removal of Cr(III) was evaluated using a batch equilibration procedure at pHi = 4 and pHi = 6. Fast removal kinetics were observed for both clays. Maximum removal capacity was determined by changing the concentration of Cr(III) while keeping the concentration of clay constant and by altering the amount of clay while keeping the concentration of Cr(III) constant. In all situations, SEP had greater capacity than KUb, and capacity was greater for both clays at higher pHi. Not only did the pHi impact the removal capacity and efficiency, but so did the pH during adsorption and the initial concentration of Cr(III). Because of the higher PZC, the pHf for SEP was higher for the same pHi. The higher the pH and Cr(III) concentration, the higher the probability of Cr(OH)3 precipitation and the higher the removal capacity. Dried saturated clays were uniaxially pressed and sintered at 1000 °C for 2 h. The densities of the sintered materials were nearly identical to those of pure clay-based materials, but the compressive strengths were higher, which is significant for the use of saturated clays as raw materials in ceramic manufacturing. Leaching of Cr from SEP-based material was significantly higher than from KUb-based material probably due to the presence of CaCO3 in the SEP.",
publisher = "Elsevier",
journal = "Applied  Clay Sciences",
title = "Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing",
pages = "106747",
volume = "231",
doi = "10.1016/j.clay.2022.106747"
}

Petrović, R., Lazarević, S., Janković-Častvan, I., Matić, T., Milivojević, M., Milošević, D.,& Veljović, Đ.. (2023). Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing. in Applied  Clay Sciences
Elsevier., 231, 106747.
https://doi.org/10.1016/j.clay.2022.106747

Petrović R, Lazarević S, Janković-Častvan I, Matić T, Milivojević M, Milošević D, Veljović Đ. Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing. in Applied  Clay Sciences. 2023;231:106747.
doi:10.1016/j.clay.2022.106747 .

Petrović, Rada, Lazarević, Slavica, Janković-Častvan, Ivona, Matić, Tamara, Milivojević, Marko, Milošević, Dragana, Veljović, Đorđe, "Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing" in Applied  Clay Sciences, 231 (2023):106747,
https://doi.org/10.1016/j.clay.2022.106747 . .

TY  - JOUR
AU  - Milovanović, Željka
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Radovanović, Željko
AU  - Cvetković, Slobodan
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6578
AB  - The sepiolite/ZrO2 composites were prepared by sepiolite (Sep) modification with zirconium propoxide in toluene at room temperature for 24 h (Sep–ZrI) or 95 °C for 4 h (sample Sep–ZrII). The efficiency of the obtained composites for the removal of phosphate from aqueous solutions at initial pH = 4 and pH = 8 was investigated. Characterization of the samples shows that synthesis at a higher temperature for a shorter time provides a slightly higher content of amorphous Zr phase, which is deposited on the sepiolite fibers as a thin layer and agglomerated nanoparticles. Compared to Sep, the composites have a lower point of zero charge and higher specific surface area and pore volume. The adsorption kinetics follow the pseudo second-order model. The adsorption capacities of the composites are approximately the same at both initial pH and higher at initial pH = 4 than at pH = 8. The XPS and ATR-FTIR of Sep–ZrI before and after adsorption identifies the formation of inner-sphere complexes as the mechanism of phosphate adsorption. The slow release during desorption with NaOH solution confirms the strong bonds of the phosphates with the surface of the composites.
PB  - MDPI
T2  - Water
T1  - The Removal of Phosphate from Aqueous Solutions by Sepiolite/ZrO2 Composites: Adsorption Behavior and Mechanism
IS  - 13
SP  - 2376
VL  - 15
DO  - 10.3390/w15132376
ER  - 

@article{
author = "Milovanović, Željka and Lazarević, Slavica and Janković-Častvan, Ivona and Radovanović, Željko and Cvetković, Slobodan and Janaćković, Đorđe and Petrović, Rada",
year = "2023",
abstract = "The sepiolite/ZrO2 composites were prepared by sepiolite (Sep) modification with zirconium propoxide in toluene at room temperature for 24 h (Sep–ZrI) or 95 °C for 4 h (sample Sep–ZrII). The efficiency of the obtained composites for the removal of phosphate from aqueous solutions at initial pH = 4 and pH = 8 was investigated. Characterization of the samples shows that synthesis at a higher temperature for a shorter time provides a slightly higher content of amorphous Zr phase, which is deposited on the sepiolite fibers as a thin layer and agglomerated nanoparticles. Compared to Sep, the composites have a lower point of zero charge and higher specific surface area and pore volume. The adsorption kinetics follow the pseudo second-order model. The adsorption capacities of the composites are approximately the same at both initial pH and higher at initial pH = 4 than at pH = 8. The XPS and ATR-FTIR of Sep–ZrI before and after adsorption identifies the formation of inner-sphere complexes as the mechanism of phosphate adsorption. The slow release during desorption with NaOH solution confirms the strong bonds of the phosphates with the surface of the composites.",
publisher = "MDPI",
journal = "Water",
title = "The Removal of Phosphate from Aqueous Solutions by Sepiolite/ZrO2 Composites: Adsorption Behavior and Mechanism",
number = "13",
pages = "2376",
volume = "15",
doi = "10.3390/w15132376"
}

Milovanović, Ž., Lazarević, S., Janković-Častvan, I., Radovanović, Ž., Cvetković, S., Janaćković, Đ.,& Petrović, R.. (2023). The Removal of Phosphate from Aqueous Solutions by Sepiolite/ZrO2 Composites: Adsorption Behavior and Mechanism. in Water
MDPI., 15(13), 2376.
https://doi.org/10.3390/w15132376

Milovanović Ž, Lazarević S, Janković-Častvan I, Radovanović Ž, Cvetković S, Janaćković Đ, Petrović R. The Removal of Phosphate from Aqueous Solutions by Sepiolite/ZrO2 Composites: Adsorption Behavior and Mechanism. in Water. 2023;15(13):2376.
doi:10.3390/w15132376 .

Milovanović, Željka, Lazarević, Slavica, Janković-Častvan, Ivona, Radovanović, Željko, Cvetković, Slobodan, Janaćković, Đorđe, Petrović, Rada, "The Removal of Phosphate from Aqueous Solutions by Sepiolite/ZrO2 Composites: Adsorption Behavior and Mechanism" in Water, 15, no. 13 (2023):2376,
https://doi.org/10.3390/w15132376 . .

TY  - CONF
AU  - Marjanović, Vesna
AU  - Janković-Častvan, Ivona
AU  - Lazarević, Slavica
AU  - Radovanović, Željko
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5920
AB  - Ciprofloxacin (CIP) as a broad-spectrum quinolone antibiotic is extensively used in daily life and can be detected in municipal and pharmaceutical wastewaters, as well as natural waters. In this study, natural mineral sepiolite (SEP), SEP modified with hexadecyltrimethylammonium-bromide (HDAB) and SEP composites with graphene oxide (GO) were used as adsorbents for the removal of CIP from aqueous solutions. The composites were prepared at a mass ratio SEP to GO of 2 : 1, using SEP and SEP modified by [3-(2-aminoethylamino)propyl]trimethoxy-silane (APT). Thermogravimetric analysis, X-ray diffraction and nitrogen adsorption-desorption were used to characterize the obtained adsorbents. The adsorption of CIP was investigated at the pH value close to pH of natural waters. The concentration of CIP in aqueous solution was determined by UV-Vis spectroscopy. GO showed the highest adsorption capacity (~ 150 mg/g). The capacity of SEP was about 60 mg/g, while the SEP modification with HDAB has led to a decrease in the adsorption capacity (~ 35 mg/g). The composite SEP/GO showed the higher adsorption capacity (~ 110 mg/g) than the composite SEP-APT/GO (~ 40 mg/g). The capacity of the composite SEP/GO was higher than of mixture of SEP and GO, which indicated a certain degree of GO exfoliation and intecalation of sepiolie particles, as it was shown by X-ray diffraction. Equilibrium data for all adsorbents, except for HDAB modified sepiolite, fitted well to the Langmuir isotherm model.
PB  - University of Novi Sad, Faculty of Technology Novi Sad
C3  - 2nd International Conference on Advanced Production and Processing, Book of abstracts
T1  - Ciprofloxacin removal using sepiolite-based adsorbents
SP  - 218
SP  - 218
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5920
ER  - 

@conference{
author = "Marjanović, Vesna and Janković-Častvan, Ivona and Lazarević, Slavica and Radovanović, Željko and Janaćković, Đorđe and Petrović, Rada",
year = "2022",
abstract = "Ciprofloxacin (CIP) as a broad-spectrum quinolone antibiotic is extensively used in daily life and can be detected in municipal and pharmaceutical wastewaters, as well as natural waters. In this study, natural mineral sepiolite (SEP), SEP modified with hexadecyltrimethylammonium-bromide (HDAB) and SEP composites with graphene oxide (GO) were used as adsorbents for the removal of CIP from aqueous solutions. The composites were prepared at a mass ratio SEP to GO of 2 : 1, using SEP and SEP modified by [3-(2-aminoethylamino)propyl]trimethoxy-silane (APT). Thermogravimetric analysis, X-ray diffraction and nitrogen adsorption-desorption were used to characterize the obtained adsorbents. The adsorption of CIP was investigated at the pH value close to pH of natural waters. The concentration of CIP in aqueous solution was determined by UV-Vis spectroscopy. GO showed the highest adsorption capacity (~ 150 mg/g). The capacity of SEP was about 60 mg/g, while the SEP modification with HDAB has led to a decrease in the adsorption capacity (~ 35 mg/g). The composite SEP/GO showed the higher adsorption capacity (~ 110 mg/g) than the composite SEP-APT/GO (~ 40 mg/g). The capacity of the composite SEP/GO was higher than of mixture of SEP and GO, which indicated a certain degree of GO exfoliation and intecalation of sepiolie particles, as it was shown by X-ray diffraction. Equilibrium data for all adsorbents, except for HDAB modified sepiolite, fitted well to the Langmuir isotherm model.",
publisher = "University of Novi Sad, Faculty of Technology Novi Sad",
journal = "2nd International Conference on Advanced Production and Processing, Book of abstracts",
title = "Ciprofloxacin removal using sepiolite-based adsorbents",
pages = "218-218",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5920"
}

Marjanović, V., Janković-Častvan, I., Lazarević, S., Radovanović, Ž., Janaćković, Đ.,& Petrović, R.. (2022). Ciprofloxacin removal using sepiolite-based adsorbents. in 2nd International Conference on Advanced Production and Processing, Book of abstracts
University of Novi Sad, Faculty of Technology Novi Sad., 218.
https://hdl.handle.net/21.15107/rcub_technorep_5920

Marjanović V, Janković-Častvan I, Lazarević S, Radovanović Ž, Janaćković Đ, Petrović R. Ciprofloxacin removal using sepiolite-based adsorbents. in 2nd International Conference on Advanced Production and Processing, Book of abstracts. 2022;:218.
https://hdl.handle.net/21.15107/rcub_technorep_5920 .

Marjanović, Vesna, Janković-Častvan, Ivona, Lazarević, Slavica, Radovanović, Željko, Janaćković, Đorđe, Petrović, Rada, "Ciprofloxacin removal using sepiolite-based adsorbents" in 2nd International Conference on Advanced Production and Processing, Book of abstracts (2022):218,
https://hdl.handle.net/21.15107/rcub_technorep_5920 .

TY  - JOUR
AU  - Milosevic, Dragana
AU  - Levic, Steva
AU  - Lazarević, Slavica
AU  - Veličković, Zlate
AU  - Marinković, Aleksandar
AU  - Petrović, Rada
AU  - Petrović, Predrag
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4788
AB  - The alkali treated subglebal tissue of the mosaic puffball (Handkea utriformis) (Sa) and Sa modified with hydroxyapatite (Sa-HAp), obtained by successive ionic layer adsorption and reaction (SILAR) method, were used for the removal of Pb2+, Cd2+ and Ni2+ from aqueous solution. The materials were characterized by FT-IR, Raman, SEM and EDS analysis and by determination of pH(PZC). The adsorption performances of Sa and SaHAp were assessed in batch experiments at different pH, contact times, temperatures and mass of the adsorbent. Different models of adsorption isotherms were used, and the best fit was obtained with the Langmuir model. Maximum adsorption capacities of Sa towards Pb2+, Cd2+ and Ni2+ were 44.82, 15.54 and 17.21 mg g(-1), while for Sa-HAp were 79.55, 52.59 and 45.01 mg g(-1), respectively. Kinetic data were well fitted by a pseudo second-order model, while thermodynamic studies disclose spontaneous and endothermic adsorption process. The Sa-Hap was successfully regenerated with 1 M NaCl and after the fifth desorption cycle and 10 h achieved 82.9, 69.7 and 60.4 %, while for 0.5 M NaCl + 0.5 M NaOH and 1 h was 78.3, 64.1, 57.5 % of desorbed Pb2+, Cd2+ and Ni2+, respectively. The competitive study and results from a column system confirmed good applicability of Sa-HAp adsorbent.
T2  - Journal of Environmental Management
T1  - Hybrid material based on subgleba of mosaic puffball mushroom (Handkea utriformis) as an adsorbent for heavy metal removal from aqueous solutions
VL  - 297
DO  - 10.1016/j.jenvman.2021.113358
ER  - 

@article{
author = "Milosevic, Dragana and Levic, Steva and Lazarević, Slavica and Veličković, Zlate and Marinković, Aleksandar and Petrović, Rada and Petrović, Predrag",
year = "2021",
abstract = "The alkali treated subglebal tissue of the mosaic puffball (Handkea utriformis) (Sa) and Sa modified with hydroxyapatite (Sa-HAp), obtained by successive ionic layer adsorption and reaction (SILAR) method, were used for the removal of Pb2+, Cd2+ and Ni2+ from aqueous solution. The materials were characterized by FT-IR, Raman, SEM and EDS analysis and by determination of pH(PZC). The adsorption performances of Sa and SaHAp were assessed in batch experiments at different pH, contact times, temperatures and mass of the adsorbent. Different models of adsorption isotherms were used, and the best fit was obtained with the Langmuir model. Maximum adsorption capacities of Sa towards Pb2+, Cd2+ and Ni2+ were 44.82, 15.54 and 17.21 mg g(-1), while for Sa-HAp were 79.55, 52.59 and 45.01 mg g(-1), respectively. Kinetic data were well fitted by a pseudo second-order model, while thermodynamic studies disclose spontaneous and endothermic adsorption process. The Sa-Hap was successfully regenerated with 1 M NaCl and after the fifth desorption cycle and 10 h achieved 82.9, 69.7 and 60.4 %, while for 0.5 M NaCl + 0.5 M NaOH and 1 h was 78.3, 64.1, 57.5 % of desorbed Pb2+, Cd2+ and Ni2+, respectively. The competitive study and results from a column system confirmed good applicability of Sa-HAp adsorbent.",
journal = "Journal of Environmental Management",
title = "Hybrid material based on subgleba of mosaic puffball mushroom (Handkea utriformis) as an adsorbent for heavy metal removal from aqueous solutions",
volume = "297",
doi = "10.1016/j.jenvman.2021.113358"
}

Milosevic, D., Levic, S., Lazarević, S., Veličković, Z., Marinković, A., Petrović, R.,& Petrović, P.. (2021). Hybrid material based on subgleba of mosaic puffball mushroom (Handkea utriformis) as an adsorbent for heavy metal removal from aqueous solutions. in Journal of Environmental Management, 297.
https://doi.org/10.1016/j.jenvman.2021.113358

Milosevic D, Levic S, Lazarević S, Veličković Z, Marinković A, Petrović R, Petrović P. Hybrid material based on subgleba of mosaic puffball mushroom (Handkea utriformis) as an adsorbent for heavy metal removal from aqueous solutions. in Journal of Environmental Management. 2021;297.
doi:10.1016/j.jenvman.2021.113358 .

Milosevic, Dragana, Levic, Steva, Lazarević, Slavica, Veličković, Zlate, Marinković, Aleksandar, Petrović, Rada, Petrović, Predrag, "Hybrid material based on subgleba of mosaic puffball mushroom (Handkea utriformis) as an adsorbent for heavy metal removal from aqueous solutions" in Journal of Environmental Management, 297 (2021),
https://doi.org/10.1016/j.jenvman.2021.113358 . .

TY  - CONF
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5922
AB  - The wide use of antibiotics, the increase in chemical industry and traffic, as well as the medical industry resulted in formation of wastewater, which contains complexes of heavy metals and antibiotics. Earlier researches have shown that clay minerals had a significant large adsorption capacity for heavy metal ions, and recently examinations are focused on investigation of the possibility of treatment of water with presence of antibiotics and heavy metal ions. In this paper, the possibility of application of natural mineral sepolite for simultaneous removal of antibiotics of ciprofloxacin and copper ions from aqueous solutions. It was shown that at the initial pH of 6,0±0,1 presence of the copper ions (~ 20 mg/dm3) increased the adsorption capacity of ciprofloxacin onto sepiolite, while the presence of ciprofloxacin, had no significant influence on the removal capacity of Cu2+ ions. The results of adsorption isotherms indicated significant adsorption capacity for both, ciprofloxacin and Cu2+ ions, ie. it was shown that natural mineral sepiolite was very effective adsorbent for the simultaneous removal of ciprofloxacin and Cu2+ ions as a significant water pollutants.
C3  - Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija
T1  - SIMULTANEOUS ADSORPTION OF COPER IONS AND ANTIBIOTICS CIPROFLOXACIN FROM WATER AT SEPIOLITE
SP  - 232
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5922
ER  - 

@conference{
author = "Lazarević, Slavica and Janković-Častvan, Ivona and Janaćković, Đorđe and Petrović, Rada",
year = "2021",
abstract = "The wide use of antibiotics, the increase in chemical industry and traffic, as well as the medical industry resulted in formation of wastewater, which contains complexes of heavy metals and antibiotics. Earlier researches have shown that clay minerals had a significant large adsorption capacity for heavy metal ions, and recently examinations are focused on investigation of the possibility of treatment of water with presence of antibiotics and heavy metal ions. In this paper, the possibility of application of natural mineral sepolite for simultaneous removal of antibiotics of ciprofloxacin and copper ions from aqueous solutions. It was shown that at the initial pH of 6,0±0,1 presence of the copper ions (~ 20 mg/dm3) increased the adsorption capacity of ciprofloxacin onto sepiolite, while the presence of ciprofloxacin, had no significant influence on the removal capacity of Cu2+ ions. The results of adsorption isotherms indicated significant adsorption capacity for both, ciprofloxacin and Cu2+ ions, ie. it was shown that natural mineral sepiolite was very effective adsorbent for the simultaneous removal of ciprofloxacin and Cu2+ ions as a significant water pollutants.",
journal = "Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija",
title = "SIMULTANEOUS ADSORPTION OF COPER IONS AND ANTIBIOTICS CIPROFLOXACIN FROM WATER AT SEPIOLITE",
pages = "232",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5922"
}

Lazarević, S., Janković-Častvan, I., Janaćković, Đ.,& Petrović, R.. (2021). SIMULTANEOUS ADSORPTION OF COPER IONS AND ANTIBIOTICS CIPROFLOXACIN FROM WATER AT SEPIOLITE. in Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija, 232.
https://hdl.handle.net/21.15107/rcub_technorep_5922

Lazarević S, Janković-Častvan I, Janaćković Đ, Petrović R. SIMULTANEOUS ADSORPTION OF COPER IONS AND ANTIBIOTICS CIPROFLOXACIN FROM WATER AT SEPIOLITE. in Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija. 2021;:232.
https://hdl.handle.net/21.15107/rcub_technorep_5922 .

Lazarević, Slavica, Janković-Častvan, Ivona, Janaćković, Đorđe, Petrović, Rada, "SIMULTANEOUS ADSORPTION OF COPER IONS AND ANTIBIOTICS CIPROFLOXACIN FROM WATER AT SEPIOLITE" in Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija (2021):232,
https://hdl.handle.net/21.15107/rcub_technorep_5922 .

TY  - CONF
AU  - Petrović, Rada
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Radovanović, Željko
AU  - Janaćković, Đorđe
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5925
AB  - Наночестице елементарног гвожђа (nano zero valent iron, nZVI) се све више користе за уклањање различитих загађујућих материја из воде захваљујући великој активности, нетоксичности и релативно ниској цени. Да би процес синтезе nZVI редукцијом јона гвожђа био што економичнији и еколошки прихватљив, уместо хемијских средстава примењују се екстракти лишћа различитих биљака. У овом раду, nZVI је синтетисан коришћењем екстракта лишћа храста, који је добијен екстракцијом на топло (80'С). Варирани су односи раствора FeCl3 и екстракта, као и концентрација раствора FeCl3, да би се утврдили оптимални услови за највећи принос nZVI. Скенирајућа електронска микроскопија је показала да су честице реда величине 20 nm и веома агломерисане. Енергетском дисперзионом спектроскопијом је да nZVI садржи мање од 10 mas. % гвожђа, услед великог садржаја компоненти екстракта. Систематска испитивања уклањања шестовалентног хрома, Cr(VI), из раствора у деминерализованој води и реалне отпадне воде су показала велики потенцијал синтетисаног nZVI за третман отпадних вода које садрже Cr(VI), посебно при ниским pН вредностима.
C3  - Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija ´21
T1  - Removal of hexavalent chromium from wastewaters using nano zero-valent iron produced by oak leaf extract
EP  - 207
SP  - 202
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5925
ER  - 

@conference{
author = "Petrović, Rada and Lazarević, Slavica and Janković-Častvan, Ivona and Radovanović, Željko and Janaćković, Đorđe",
year = "2021",
abstract = "Наночестице елементарног гвожђа (nano zero valent iron, nZVI) се све више користе за уклањање различитих загађујућих материја из воде захваљујући великој активности, нетоксичности и релативно ниској цени. Да би процес синтезе nZVI редукцијом јона гвожђа био што економичнији и еколошки прихватљив, уместо хемијских средстава примењују се екстракти лишћа различитих биљака. У овом раду, nZVI је синтетисан коришћењем екстракта лишћа храста, који је добијен екстракцијом на топло (80'С). Варирани су односи раствора FeCl3 и екстракта, као и концентрација раствора FeCl3, да би се утврдили оптимални услови за највећи принос nZVI. Скенирајућа електронска микроскопија је показала да су честице реда величине 20 nm и веома агломерисане. Енергетском дисперзионом спектроскопијом је да nZVI садржи мање од 10 mas. % гвожђа, услед великог садржаја компоненти екстракта. Систематска испитивања уклањања шестовалентног хрома, Cr(VI), из раствора у деминерализованој води и реалне отпадне воде су показала велики потенцијал синтетисаног nZVI за третман отпадних вода које садрже Cr(VI), посебно при ниским pН вредностима.",
journal = "Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija ´21",
title = "Removal of hexavalent chromium from wastewaters using nano zero-valent iron produced by oak leaf extract",
pages = "207-202",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5925"
}

Petrović, R., Lazarević, S., Janković-Častvan, I., Radovanović, Ž.,& Janaćković, Đ.. (2021). Removal of hexavalent chromium from wastewaters using nano zero-valent iron produced by oak leaf extract. in Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija ´21, 202-207.
https://hdl.handle.net/21.15107/rcub_technorep_5925

Petrović R, Lazarević S, Janković-Častvan I, Radovanović Ž, Janaćković Đ. Removal of hexavalent chromium from wastewaters using nano zero-valent iron produced by oak leaf extract. in Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija ´21. 2021;:202-207.
https://hdl.handle.net/21.15107/rcub_technorep_5925 .

Petrović, Rada, Lazarević, Slavica, Janković-Častvan, Ivona, Radovanović, Željko, Janaćković, Đorđe, "Removal of hexavalent chromium from wastewaters using nano zero-valent iron produced by oak leaf extract" in Zbornik radova 42. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija ´21 (2021):202-207,
https://hdl.handle.net/21.15107/rcub_technorep_5925 .

TY  - JOUR
AU  - Lazarević, Slavica
AU  - Marjanović, Vesna
AU  - Janković-Častvan, Ivona
AU  - Živković, Ljiljana
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4052
AB  - Natural and acid-activated sepiolites, functionalized by covalent grafting of [ 3-(2-aminoethylamino)propyl]trimethoxy-silane were used as adsorbents for the removal of an anionic Reactive Orange 16 dye from aqueous solutions. The influence of initial pH ( pH(i)) on the adsorption was first investigated in comparison with the adsorption onto unmodified sepiolites; then the dye removal process by modified samples was subjected to kinetic and equilibrium studies at pH(i) = 2.0 or 5.0, at different temperatures. Results showed that the adsorption of dye was favorable at lower pH(i) and at higher temperatures, in terms of adsorption capacity and rate of adsorption. The binding sites on the adsorbents surfaces were considered to be protonated amine groups, which play a role in the electrostatic interactions with the dye anions at pH(i) = 2.0. Formation of hydrogen bonds between hydrogen from amine groups and oxygen from the dye and van der Waals forces were proposed as the mechanisms of adsorption at pH(i) = 5.0. The adsorption kinetics was well fitted to the pseudo-second-order kinetic model, while the equilibrium adsorption data were well correlated with the Sips isotherm. The adsorption capacity of both modified sepiolites was much higher than of the parent samples, whereas the capacity of the functionalized acid-activated sepiolite was higher (similar to 172 mg/g) than of the functionalized natural sepiolite (similar to 158 mg/g) at 298 K, pH(i) 5.0.
PB  - Desalination Publ, Hopkinton
T2  - Desalination and Water Treatment
T1  - Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites
EP  - 384
SP  - 376
VL  - 163
DO  - 10.5004/dwt.2019.24437
ER  - 

@article{
author = "Lazarević, Slavica and Marjanović, Vesna and Janković-Častvan, Ivona and Živković, Ljiljana and Janaćković, Đorđe and Petrović, Rada",
year = "2019",
abstract = "Natural and acid-activated sepiolites, functionalized by covalent grafting of [ 3-(2-aminoethylamino)propyl]trimethoxy-silane were used as adsorbents for the removal of an anionic Reactive Orange 16 dye from aqueous solutions. The influence of initial pH ( pH(i)) on the adsorption was first investigated in comparison with the adsorption onto unmodified sepiolites; then the dye removal process by modified samples was subjected to kinetic and equilibrium studies at pH(i) = 2.0 or 5.0, at different temperatures. Results showed that the adsorption of dye was favorable at lower pH(i) and at higher temperatures, in terms of adsorption capacity and rate of adsorption. The binding sites on the adsorbents surfaces were considered to be protonated amine groups, which play a role in the electrostatic interactions with the dye anions at pH(i) = 2.0. Formation of hydrogen bonds between hydrogen from amine groups and oxygen from the dye and van der Waals forces were proposed as the mechanisms of adsorption at pH(i) = 5.0. The adsorption kinetics was well fitted to the pseudo-second-order kinetic model, while the equilibrium adsorption data were well correlated with the Sips isotherm. The adsorption capacity of both modified sepiolites was much higher than of the parent samples, whereas the capacity of the functionalized acid-activated sepiolite was higher (similar to 172 mg/g) than of the functionalized natural sepiolite (similar to 158 mg/g) at 298 K, pH(i) 5.0.",
publisher = "Desalination Publ, Hopkinton",
journal = "Desalination and Water Treatment",
title = "Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites",
pages = "384-376",
volume = "163",
doi = "10.5004/dwt.2019.24437"
}

Lazarević, S., Marjanović, V., Janković-Častvan, I., Živković, L., Janaćković, Đ.,& Petrović, R.. (2019). Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites. in Desalination and Water Treatment
Desalination Publ, Hopkinton., 163, 376-384.
https://doi.org/10.5004/dwt.2019.24437

Lazarević S, Marjanović V, Janković-Častvan I, Živković L, Janaćković Đ, Petrović R. Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites. in Desalination and Water Treatment. 2019;163:376-384.
doi:10.5004/dwt.2019.24437 .

Lazarević, Slavica, Marjanović, Vesna, Janković-Častvan, Ivona, Živković, Ljiljana, Janaćković, Đorđe, Petrović, Rada, "Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites" in Desalination and Water Treatment, 163 (2019):376-384,
https://doi.org/10.5004/dwt.2019.24437 . .

TY  - JOUR
AU  - Ahribesh, Aysha Ali
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Jokić, Bojan
AU  - Spasojević, Vojislav
AU  - Radetić, Tamara
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3667
AB  - The magnetic nanocomposites (MNCs), used as adsorbents for Cd2+ ions, were prepared by a co-precipitation method using both the untreated natural (SEP) and the partially acid-activated (ASEP) sepiolites as supports for magnetite. The synthesis conditions differed as follows: NaOH or NH3 was added in the SEP or the ASEP suspension before or after the addition of Fe3 and Fe2+. The SEP-based MNCs prepared using NaOH had a lower magnetization, but higher adsorption capacities than the MNCs synthesized using NH3. The order of the mixing of the reagents had a small influence on the properties of SEP-based MNCs, especially when NaOH was used for the synthesis. Due to acidity of the surface functional groups of the ASEP, the magnetic composite could be synthesized only when NH3 was added in the suspension of ASEP having Fe3+ and Fe2+ ions. Despite of the worse dispersibility of the magnetic particles, the adsorption capacityof the ASEP-based composite was higher than of the MNC with SEP prepared by the same procedure. All the MNCs showed a superparamagnetic behavior at room temperature and the adsorption capacities were higher than of pure compounds. The adsorption of Cd2+ on the composites was best fitted with the Sips model, which suggested the chemisorption on the heterogeneous surface at energetically non-uniform sites until a monolayer was formed.
PB  - Elsevier Science Bv, Amsterdam
T2  - Powder Technology
T1  - Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents
EP  - 269
SP  - 260
VL  - 305
DO  - 10.1016/j.powtec.2016.09.086
ER  - 

@article{
author = "Ahribesh, Aysha Ali and Lazarević, Slavica and Janković-Častvan, Ivona and Jokić, Bojan and Spasojević, Vojislav and Radetić, Tamara and Janaćković, Đorđe and Petrović, Rada",
year = "2017",
abstract = "The magnetic nanocomposites (MNCs), used as adsorbents for Cd2+ ions, were prepared by a co-precipitation method using both the untreated natural (SEP) and the partially acid-activated (ASEP) sepiolites as supports for magnetite. The synthesis conditions differed as follows: NaOH or NH3 was added in the SEP or the ASEP suspension before or after the addition of Fe3 and Fe2+. The SEP-based MNCs prepared using NaOH had a lower magnetization, but higher adsorption capacities than the MNCs synthesized using NH3. The order of the mixing of the reagents had a small influence on the properties of SEP-based MNCs, especially when NaOH was used for the synthesis. Due to acidity of the surface functional groups of the ASEP, the magnetic composite could be synthesized only when NH3 was added in the suspension of ASEP having Fe3+ and Fe2+ ions. Despite of the worse dispersibility of the magnetic particles, the adsorption capacityof the ASEP-based composite was higher than of the MNC with SEP prepared by the same procedure. All the MNCs showed a superparamagnetic behavior at room temperature and the adsorption capacities were higher than of pure compounds. The adsorption of Cd2+ on the composites was best fitted with the Sips model, which suggested the chemisorption on the heterogeneous surface at energetically non-uniform sites until a monolayer was formed.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Powder Technology",
title = "Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents",
pages = "269-260",
volume = "305",
doi = "10.1016/j.powtec.2016.09.086"
}

Ahribesh, A. A., Lazarević, S., Janković-Častvan, I., Jokić, B., Spasojević, V., Radetić, T., Janaćković, Đ.,& Petrović, R.. (2017). Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents. in Powder Technology
Elsevier Science Bv, Amsterdam., 305, 260-269.
https://doi.org/10.1016/j.powtec.2016.09.086

Ahribesh AA, Lazarević S, Janković-Častvan I, Jokić B, Spasojević V, Radetić T, Janaćković Đ, Petrović R. Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents. in Powder Technology. 2017;305:260-269.
doi:10.1016/j.powtec.2016.09.086 .

Ahribesh, Aysha Ali, Lazarević, Slavica, Janković-Častvan, Ivona, Jokić, Bojan, Spasojević, Vojislav, Radetić, Tamara, Janaćković, Đorđe, Petrović, Rada, "Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents" in Powder Technology, 305 (2017):260-269,
https://doi.org/10.1016/j.powtec.2016.09.086 . .

TY  - JOUR
AU  - Habish, Amal Juma
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Jokić, Bojan
AU  - Kovač, Janez
AU  - Rogan, Jelena
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3676
AB  - Natural (SEP) and partially acid-activated (AAS) sepiolites were used to prepare composites with nanoscale zerovalent iron (nZVI) at different (SEP or AAS)/nZVI ratios in order to achieve the best nZVI dispersibility and the highest adsorption capacity for Cd2+. Despite the higher surface area and pore volume of AAS, better nZVI dispersibility was achieved by using SEP as the support. On the other hand, a lower oxidation degree was achieved during the synthesis using AAS. X-ray photoelectron spectroscopy (XPS) analysis of the composite with the best nZVI dispersibility, before and after Cd2+ adsorption, confirmed that the surface of the nZVI was composed of oxidized iron species. Metallic iron was not present on the surface, but it was detected in the subsurface region after sputtering. The content of zerovalent iron decreased after Cd2+ adsorption as a result of iron oxidation during Cd2+ adsorption. The XPS depth profile showed that cadmium was present not only at the surface of the composite but also in the subsurface region. The adsorption isotherms for Cd2+ confirmed that the presence of SEP and AAS decreased the agglomeration of the nZVI particles in comparison to the pure nZVI, which provided a higher adsorption capacity. The results showed that the prevention of both aggregation and oxidation during the synthesis was necessary for obtaining an SEP/AAS-nZVI composite with a high adsorption capacity, but oxidation during adsorption was beneficial for Cd2+ removal. The formation of strong bonds between Cd2+ and the adsorbents sites of different energy until monolayer formation was proposed according to modeling of the adsorption isotherms.
PB  - Springer Heidelberg, Heidelberg
T2  - Environmental Science and Pollution Research
T1  - Nanoscale zerovalent iron (nZVI) supported by natural and acid-activated sepiolites: the effect of the nZVI/support ratio on the composite properties and Cd2+ adsorption
EP  - 643
IS  - 1
SP  - 628
VL  - 24
DO  - 10.1007/s11356-016-7802-y
ER  - 

@article{
author = "Habish, Amal Juma and Lazarević, Slavica and Janković-Častvan, Ivona and Jokić, Bojan and Kovač, Janez and Rogan, Jelena and Janaćković, Đorđe and Petrović, Rada",
year = "2017",
abstract = "Natural (SEP) and partially acid-activated (AAS) sepiolites were used to prepare composites with nanoscale zerovalent iron (nZVI) at different (SEP or AAS)/nZVI ratios in order to achieve the best nZVI dispersibility and the highest adsorption capacity for Cd2+. Despite the higher surface area and pore volume of AAS, better nZVI dispersibility was achieved by using SEP as the support. On the other hand, a lower oxidation degree was achieved during the synthesis using AAS. X-ray photoelectron spectroscopy (XPS) analysis of the composite with the best nZVI dispersibility, before and after Cd2+ adsorption, confirmed that the surface of the nZVI was composed of oxidized iron species. Metallic iron was not present on the surface, but it was detected in the subsurface region after sputtering. The content of zerovalent iron decreased after Cd2+ adsorption as a result of iron oxidation during Cd2+ adsorption. The XPS depth profile showed that cadmium was present not only at the surface of the composite but also in the subsurface region. The adsorption isotherms for Cd2+ confirmed that the presence of SEP and AAS decreased the agglomeration of the nZVI particles in comparison to the pure nZVI, which provided a higher adsorption capacity. The results showed that the prevention of both aggregation and oxidation during the synthesis was necessary for obtaining an SEP/AAS-nZVI composite with a high adsorption capacity, but oxidation during adsorption was beneficial for Cd2+ removal. The formation of strong bonds between Cd2+ and the adsorbents sites of different energy until monolayer formation was proposed according to modeling of the adsorption isotherms.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Environmental Science and Pollution Research",
title = "Nanoscale zerovalent iron (nZVI) supported by natural and acid-activated sepiolites: the effect of the nZVI/support ratio on the composite properties and Cd2+ adsorption",
pages = "643-628",
number = "1",
volume = "24",
doi = "10.1007/s11356-016-7802-y"
}

Habish, A. J., Lazarević, S., Janković-Častvan, I., Jokić, B., Kovač, J., Rogan, J., Janaćković, Đ.,& Petrović, R.. (2017). Nanoscale zerovalent iron (nZVI) supported by natural and acid-activated sepiolites: the effect of the nZVI/support ratio on the composite properties and Cd2+ adsorption. in Environmental Science and Pollution Research
Springer Heidelberg, Heidelberg., 24(1), 628-643.
https://doi.org/10.1007/s11356-016-7802-y

Habish AJ, Lazarević S, Janković-Častvan I, Jokić B, Kovač J, Rogan J, Janaćković Đ, Petrović R. Nanoscale zerovalent iron (nZVI) supported by natural and acid-activated sepiolites: the effect of the nZVI/support ratio on the composite properties and Cd2+ adsorption. in Environmental Science and Pollution Research. 2017;24(1):628-643.
doi:10.1007/s11356-016-7802-y .

Habish, Amal Juma, Lazarević, Slavica, Janković-Častvan, Ivona, Jokić, Bojan, Kovač, Janez, Rogan, Jelena, Janaćković, Đorđe, Petrović, Rada, "Nanoscale zerovalent iron (nZVI) supported by natural and acid-activated sepiolites: the effect of the nZVI/support ratio on the composite properties and Cd2+ adsorption" in Environmental Science and Pollution Research, 24, no. 1 (2017):628-643,
https://doi.org/10.1007/s11356-016-7802-y . .

TY  - CONF
AU  - Janković-Častvan, Ivona
AU  - Lazarević, Slavica
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5923
AB  - Boje se iz otpadnih voda uklanjaju razlicitim fizickim, hemijskim i bioloskim postupcima, medu kojima adsorpcija ima veliki znacaj. Medu brojnim materijalima koji se poslednjih godina ispituju kao moguci adsorbenti za boje, glineni minerali su posebno zastupljeni, zbog velike rasprostranjenosti i niske cene. Zahvaljujuci specificnoj strukturi, sepiolit je jedan od glinenih minerala koji se u prirodnom obliku iii nakon razlicitih modifikacija primenjuje za uklanjanje boja iz vodene sredine.
U ovom radu je ispitana adsorpcija katjonske boje Basic Yellow 28 na prirodnom sepiolitu. Adsorpcija je ispitana pri razlicitim pocetnim koncentracijama boje, pH vrednostima i na razlicitim temperaturama (25, 40, 50 i 60 °C). Utvrdeno je da je maksimalni adsorpcioni kapacitet - 260 mg/g na 25 °C. Proces adsorpcije se najbolje opisuje Langmuir-ovom izotermom, dok se kinetika adsorpcije najbolje opisuje kinetickim modelom pseudo-drugog reda.
C3  - Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija
T1  - The removal of cationic dye from water by adsorption on sepiolite
SP  - 21-26
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5923
ER  - 

@conference{
author = "Janković-Častvan, Ivona and Lazarević, Slavica and Petrović, Rada and Janaćković, Đorđe",
year = "2017",
abstract = "Boje se iz otpadnih voda uklanjaju razlicitim fizickim, hemijskim i bioloskim postupcima, medu kojima adsorpcija ima veliki znacaj. Medu brojnim materijalima koji se poslednjih godina ispituju kao moguci adsorbenti za boje, glineni minerali su posebno zastupljeni, zbog velike rasprostranjenosti i niske cene. Zahvaljujuci specificnoj strukturi, sepiolit je jedan od glinenih minerala koji se u prirodnom obliku iii nakon razlicitih modifikacija primenjuje za uklanjanje boja iz vodene sredine.
U ovom radu je ispitana adsorpcija katjonske boje Basic Yellow 28 na prirodnom sepiolitu. Adsorpcija je ispitana pri razlicitim pocetnim koncentracijama boje, pH vrednostima i na razlicitim temperaturama (25, 40, 50 i 60 °C). Utvrdeno je da je maksimalni adsorpcioni kapacitet - 260 mg/g na 25 °C. Proces adsorpcije se najbolje opisuje Langmuir-ovom izotermom, dok se kinetika adsorpcije najbolje opisuje kinetickim modelom pseudo-drugog reda.",
journal = "Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija",
title = "The removal of cationic dye from water by adsorption on sepiolite",
pages = "21-26",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5923"
}

Janković-Častvan, I., Lazarević, S., Petrović, R.,& Janaćković, Đ.. (2017). The removal of cationic dye from water by adsorption on sepiolite. in Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija, 21-26.
https://hdl.handle.net/21.15107/rcub_technorep_5923

Janković-Častvan I, Lazarević S, Petrović R, Janaćković Đ. The removal of cationic dye from water by adsorption on sepiolite. in Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija. 2017;:21-26.
https://hdl.handle.net/21.15107/rcub_technorep_5923 .

Janković-Častvan, Ivona, Lazarević, Slavica, Petrović, Rada, Janaćković, Đorđe, "The removal of cationic dye from water by adsorption on sepiolite" in Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija (2017):21-26,
https://hdl.handle.net/21.15107/rcub_technorep_5923 .

TY  - CONF
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5930
AB  - Otpadne vode tekstilne industrije, pored boja, sadrze cesto i jone metala kao posledicu obrade i oplemenjivanja tekstilnih materijala, sto utice na zagadenje prirodnih voda. Pokazano je da je adsorpcija na prirodnim mineralima efikasan i ekonomican postupak za uklanjanje mnogih boja, kao i za uklanjanje katjona teskih metala, a u poslednje vreme se ispituje mogucnost simultanog uklanjanja boja i katjona metala na razlicitim glinenim mineralima.
U ovom radu je ispitivano simultano uklanjanje katjonske boje Basic Yellow 28 i Cd2+ jona na prirodnom glinenom mineralu sepiolitu. Utvrdeno je da povecanje pH vrednosti ne utice na kolicinu adsorbovane boje, dok u slucaju Cd2+ jona adsorpcioni kapacitet raste sa porastom pH. Pokazano je da povecanje koncentracije boje ne dovodi do smanjenja ko­ licine adsorbovanih Cd2+ jona, kao i da povecanje koncentracije Cd2+ jona ne uzrokuje smanjenje kolicine adsorbovane boje.
AB  - Wastewaters of textile industry contain dyes and metal ions as a result of processing and finishing of textile materials which affects the pollution of natural waters. The adsorption on natural minerals is effective and economic method for the removal of both dyes and metal ions. Recently, the possibility of simultaneous removal of dyes and metal cations onto clay minerals has been investigated.
In this study, simultaneous adsorption of dye Basic Yellow 28 and Cd2+ ions on natural sepiolite was investigated. lt was shown that increase of pH value had no influence on the adsorption capacity for dye, while the adsorption capacity for Cd2+ ions increased with pH increasing. The increase of dye concentration did not decrease the quantity of adsorbed Cd2+ ions and the increase of Cd2+ ions concentration did not decrease the quantity of adsorbed dye.
C3  - Zbornik radova 38. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija
T1  - Simultaneous adsorption of Cd2+ ions and cationic dye from water by adsorption on sepiolite,
SP  - 27-32
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5930
ER  - 

@conference{
author = "Lazarević, Slavica and Janković-Častvan, Ivona and Petrović, Rada and Janaćković, Đorđe",
year = "2017",
abstract = "Otpadne vode tekstilne industrije, pored boja, sadrze cesto i jone metala kao posledicu obrade i oplemenjivanja tekstilnih materijala, sto utice na zagadenje prirodnih voda. Pokazano je da je adsorpcija na prirodnim mineralima efikasan i ekonomican postupak za uklanjanje mnogih boja, kao i za uklanjanje katjona teskih metala, a u poslednje vreme se ispituje mogucnost simultanog uklanjanja boja i katjona metala na razlicitim glinenim mineralima.
U ovom radu je ispitivano simultano uklanjanje katjonske boje Basic Yellow 28 i Cd2+ jona na prirodnom glinenom mineralu sepiolitu. Utvrdeno je da povecanje pH vrednosti ne utice na kolicinu adsorbovane boje, dok u slucaju Cd2+ jona adsorpcioni kapacitet raste sa porastom pH. Pokazano je da povecanje koncentracije boje ne dovodi do smanjenja ko­ licine adsorbovanih Cd2+ jona, kao i da povecanje koncentracije Cd2+ jona ne uzrokuje smanjenje kolicine adsorbovane boje., Wastewaters of textile industry contain dyes and metal ions as a result of processing and finishing of textile materials which affects the pollution of natural waters. The adsorption on natural minerals is effective and economic method for the removal of both dyes and metal ions. Recently, the possibility of simultaneous removal of dyes and metal cations onto clay minerals has been investigated.
In this study, simultaneous adsorption of dye Basic Yellow 28 and Cd2+ ions on natural sepiolite was investigated. lt was shown that increase of pH value had no influence on the adsorption capacity for dye, while the adsorption capacity for Cd2+ ions increased with pH increasing. The increase of dye concentration did not decrease the quantity of adsorbed Cd2+ ions and the increase of Cd2+ ions concentration did not decrease the quantity of adsorbed dye.",
journal = "Zbornik radova 38. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija",
title = "Simultaneous adsorption of Cd2+ ions and cationic dye from water by adsorption on sepiolite,",
pages = "27-32",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5930"
}

Lazarević, S., Janković-Častvan, I., Petrović, R.,& Janaćković, Đ.. (2017). Simultaneous adsorption of Cd2+ ions and cationic dye from water by adsorption on sepiolite,. in Zbornik radova 38. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija, 27-32.
https://hdl.handle.net/21.15107/rcub_technorep_5930

Lazarević S, Janković-Častvan I, Petrović R, Janaćković Đ. Simultaneous adsorption of Cd2+ ions and cationic dye from water by adsorption on sepiolite,. in Zbornik radova 38. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija. 2017;:27-32.
https://hdl.handle.net/21.15107/rcub_technorep_5930 .

Lazarević, Slavica, Janković-Častvan, Ivona, Petrović, Rada, Janaćković, Đorđe, "Simultaneous adsorption of Cd2+ ions and cationic dye from water by adsorption on sepiolite," in Zbornik radova 38. Međunarodnog stručno-naučnog skupa Vodovod i kanalizacija (2017):27-32,
https://hdl.handle.net/21.15107/rcub_technorep_5930 .

TY  - JOUR
AU  - Ćosović, Aleksandar
AU  - Žák, Tomáš
AU  - Glišić, Sandra
AU  - Sokić, Miroslav
AU  - Lazarević, Slavica
AU  - Ćosović, Vladan
AU  - Orlović, Aleksandar
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3262
AB  - Nano-crystalline nickel ferrite has a broad range of applications due to its favourable magnetic properties. Those characteristics can be significantly influenced by the synthesis pathway including methods conducted in the presence of supercritical alcohols. Nano-crystalline NiFe2O4 powders were obtained in the reaction under subcritical and supercritical conditions of ethanol. Both high pressure synthesis routes resulted in powders with smaller primary particles and higher mesoporosity than co-precipitation method. Upon the annealing treatment the average crystallite size increased while material structure remained uniform, resulting in significantly enhanced magnetic properties, such as coercivity and remanence. It was found that synthesis under supercritical conditions provides higher conversion but also material with larger average crystallite size upon annealing. The time and temperature of annealing stage significantly influenced the morphology and magnetic properties of the obtained powders.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Supercritical Fluids
T1  - Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol
EP  - 105
SP  - 96
VL  - 113
DO  - 10.1016/j.supflu.2016.03.014
ER  - 

@article{
author = "Ćosović, Aleksandar and Žák, Tomáš and Glišić, Sandra and Sokić, Miroslav and Lazarević, Slavica and Ćosović, Vladan and Orlović, Aleksandar",
year = "2016",
abstract = "Nano-crystalline nickel ferrite has a broad range of applications due to its favourable magnetic properties. Those characteristics can be significantly influenced by the synthesis pathway including methods conducted in the presence of supercritical alcohols. Nano-crystalline NiFe2O4 powders were obtained in the reaction under subcritical and supercritical conditions of ethanol. Both high pressure synthesis routes resulted in powders with smaller primary particles and higher mesoporosity than co-precipitation method. Upon the annealing treatment the average crystallite size increased while material structure remained uniform, resulting in significantly enhanced magnetic properties, such as coercivity and remanence. It was found that synthesis under supercritical conditions provides higher conversion but also material with larger average crystallite size upon annealing. The time and temperature of annealing stage significantly influenced the morphology and magnetic properties of the obtained powders.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Supercritical Fluids",
title = "Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol",
pages = "105-96",
volume = "113",
doi = "10.1016/j.supflu.2016.03.014"
}

Ćosović, A., Žák, T., Glišić, S., Sokić, M., Lazarević, S., Ćosović, V.,& Orlović, A.. (2016). Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol. in Journal of Supercritical Fluids
Elsevier Science Bv, Amsterdam., 113, 96-105.
https://doi.org/10.1016/j.supflu.2016.03.014

Ćosović A, Žák T, Glišić S, Sokić M, Lazarević S, Ćosović V, Orlović A. Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol. in Journal of Supercritical Fluids. 2016;113:96-105.
doi:10.1016/j.supflu.2016.03.014 .

Ćosović, Aleksandar, Žák, Tomáš, Glišić, Sandra, Sokić, Miroslav, Lazarević, Slavica, Ćosović, Vladan, Orlović, Aleksandar, "Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol" in Journal of Supercritical Fluids, 113 (2016):96-105,
https://doi.org/10.1016/j.supflu.2016.03.014 . .

TY  - JOUR
AU  - Janković-Častvan, Ivona
AU  - Lazarević, Slavica
AU  - Stojanović, Dušica
AU  - Živković, Predrag M.
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3320
AB  - In order to improve the mechanical properties of paper, 1, 3 and 5 wt. % of sepiolite were dispersed in a poly(vinyl butyral) (PVB) matrix and coated onto the surface of schrenz (110 g m(-2)). Deagglomerated sepiolite nanofibers in the PVB matrix on the paper surface were observed by scanning electron microscopy. The glass transition temperature of schrenz with PVB/sepiolite coatings was not changed with increasing content of sepiolite. Two different methods were used to evaluate the mechanical properties of the paper sample reinforced with PVB/sepiolite nanocomposites: tensile testing and nanoindentation. The values of breaking force and tensile energy absorption of the reinforced paper samples obtained by tensile testing were increased by up 10 %. The values of the reduced elastic modulus and hardness obtained by nanoindentation were increased by up to 78 %. The best improvement of the mechanical properties was shown by the paper sample coated with PVB/3 wt. % sepiolite nanocomposite.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - PVB/sepiolite nanocomposites as reinforcement agents for paper
EP  - 1305
IS  - 11
SP  - 1295
VL  - 81
DO  - 10.2298/JSC160506067J
ER  - 

@article{
author = "Janković-Častvan, Ivona and Lazarević, Slavica and Stojanović, Dušica and Živković, Predrag M. and Petrović, Rada and Janaćković, Đorđe",
year = "2016",
abstract = "In order to improve the mechanical properties of paper, 1, 3 and 5 wt. % of sepiolite were dispersed in a poly(vinyl butyral) (PVB) matrix and coated onto the surface of schrenz (110 g m(-2)). Deagglomerated sepiolite nanofibers in the PVB matrix on the paper surface were observed by scanning electron microscopy. The glass transition temperature of schrenz with PVB/sepiolite coatings was not changed with increasing content of sepiolite. Two different methods were used to evaluate the mechanical properties of the paper sample reinforced with PVB/sepiolite nanocomposites: tensile testing and nanoindentation. The values of breaking force and tensile energy absorption of the reinforced paper samples obtained by tensile testing were increased by up 10 %. The values of the reduced elastic modulus and hardness obtained by nanoindentation were increased by up to 78 %. The best improvement of the mechanical properties was shown by the paper sample coated with PVB/3 wt. % sepiolite nanocomposite.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "PVB/sepiolite nanocomposites as reinforcement agents for paper",
pages = "1305-1295",
number = "11",
volume = "81",
doi = "10.2298/JSC160506067J"
}

Janković-Častvan, I., Lazarević, S., Stojanović, D., Živković, P. M., Petrović, R.,& Janaćković, Đ.. (2016). PVB/sepiolite nanocomposites as reinforcement agents for paper. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 81(11), 1295-1305.
https://doi.org/10.2298/JSC160506067J

Janković-Častvan I, Lazarević S, Stojanović D, Živković PM, Petrović R, Janaćković Đ. PVB/sepiolite nanocomposites as reinforcement agents for paper. in Journal of the Serbian Chemical Society. 2016;81(11):1295-1305.
doi:10.2298/JSC160506067J .

Janković-Častvan, Ivona, Lazarević, Slavica, Stojanović, Dušica, Živković, Predrag M., Petrović, Rada, Janaćković, Đorđe, "PVB/sepiolite nanocomposites as reinforcement agents for paper" in Journal of the Serbian Chemical Society, 81, no. 11 (2016):1295-1305,
https://doi.org/10.2298/JSC160506067J . .

TY  - JOUR
AU  - Savić, Andrija B.
AU  - Čokeša, Đuro
AU  - Lazarević, Slavica
AU  - Jokić, Bojan
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
AU  - Živković, Ljiljana
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3356
AB  - This study demonstrates that PEG-assisted hydrothermal synthesis provides a convenient and eco-friendly route to fabrication of mesoporous magnetite with enhanced capacity for phosphate removal, excellent potential for magnetic separation and good reusability. Adsorption of phosphate onto 4 laboratory prepared magnetite powders was investigated in a systematic manner. Powders were synthesized in poly(ethylene) glycol-free or assisted conditions (PEGs 400 and 20,000 at varied PEG/water ratio), and characterized in terms of crystalline structure, and magnetic, morphological, textural, and acid-base properties. PEG acted as a powerful pore forming agent, the PEG/water ratio being the key factor in developing the surface area and mesoporosity of magnetite. Uptake capacity for phosphates increased with an increase in surface area and pore volume. PEG 20,000 at a ratio of 3:1 gave the best result. This mesoporous (D-max = 11 nm), nano-scale ( lt 10 nm) magnetite was ca. 9 times more efficient than nonporous micrometric powder derived from PEG-free synthesis (Langmuir maximum capacity, q(m) = 26.2 vs. 3.0 mg g(-1)). The adsorption was pH-dependent, in accord with variations in zeta potential of magnetite. Opposite shifts of isoelectric point and point of zero charge confirmed specific adsorption of phosphates at water/magnetite interface which proceeded via replacement of surface hydroxyls and sulfates.
PB  - Elsevier Science Bv, Amsterdam
T2  - Powder Technology
T1  - Tailoring of magnetite powder properties for enhanced phosphate removal: Effect of PEG addition in the synthesis process
EP  - 519
SP  - 511
VL  - 301
DO  - 10.1016/j.powtec.2016.06.028
ER  - 

@article{
author = "Savić, Andrija B. and Čokeša, Đuro and Lazarević, Slavica and Jokić, Bojan and Janaćković, Đorđe and Petrović, Rada and Živković, Ljiljana",
year = "2016",
abstract = "This study demonstrates that PEG-assisted hydrothermal synthesis provides a convenient and eco-friendly route to fabrication of mesoporous magnetite with enhanced capacity for phosphate removal, excellent potential for magnetic separation and good reusability. Adsorption of phosphate onto 4 laboratory prepared magnetite powders was investigated in a systematic manner. Powders were synthesized in poly(ethylene) glycol-free or assisted conditions (PEGs 400 and 20,000 at varied PEG/water ratio), and characterized in terms of crystalline structure, and magnetic, morphological, textural, and acid-base properties. PEG acted as a powerful pore forming agent, the PEG/water ratio being the key factor in developing the surface area and mesoporosity of magnetite. Uptake capacity for phosphates increased with an increase in surface area and pore volume. PEG 20,000 at a ratio of 3:1 gave the best result. This mesoporous (D-max = 11 nm), nano-scale ( lt 10 nm) magnetite was ca. 9 times more efficient than nonporous micrometric powder derived from PEG-free synthesis (Langmuir maximum capacity, q(m) = 26.2 vs. 3.0 mg g(-1)). The adsorption was pH-dependent, in accord with variations in zeta potential of magnetite. Opposite shifts of isoelectric point and point of zero charge confirmed specific adsorption of phosphates at water/magnetite interface which proceeded via replacement of surface hydroxyls and sulfates.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Powder Technology",
title = "Tailoring of magnetite powder properties for enhanced phosphate removal: Effect of PEG addition in the synthesis process",
pages = "519-511",
volume = "301",
doi = "10.1016/j.powtec.2016.06.028"
}

Savić, A. B., Čokeša, Đ., Lazarević, S., Jokić, B., Janaćković, Đ., Petrović, R.,& Živković, L.. (2016). Tailoring of magnetite powder properties for enhanced phosphate removal: Effect of PEG addition in the synthesis process. in Powder Technology
Elsevier Science Bv, Amsterdam., 301, 511-519.
https://doi.org/10.1016/j.powtec.2016.06.028

Savić AB, Čokeša Đ, Lazarević S, Jokić B, Janaćković Đ, Petrović R, Živković L. Tailoring of magnetite powder properties for enhanced phosphate removal: Effect of PEG addition in the synthesis process. in Powder Technology. 2016;301:511-519.
doi:10.1016/j.powtec.2016.06.028 .

Savić, Andrija B., Čokeša, Đuro, Lazarević, Slavica, Jokić, Bojan, Janaćković, Đorđe, Petrović, Rada, Živković, Ljiljana, "Tailoring of magnetite powder properties for enhanced phosphate removal: Effect of PEG addition in the synthesis process" in Powder Technology, 301 (2016):511-519,
https://doi.org/10.1016/j.powtec.2016.06.028 . .

TY  - JOUR
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Jokić, Bojan
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3455
AB  - The sorption of Ni2+ on sepiolite functionalized by covalent grafting of N-[3-(trimethoxysilyl) propyl] ethylenediamine triacetic acid trisodium salt, MSEAS, was studied in batch experiments as a function of the initial metal concentration, the equilibration time, the pH value and the temperature. The modification of sepiolite resulted in enhanced Ni2+ retention with a capacity of 0.261 mmol g(-1) at 298 K. The retention of Ni2+ occurred dominantly by specific sorption and exchange of Mg2+ from the sepiolite structure. The sorption process followed pseudo-second-order kinetics. The sorption equilibrium results were best described by the non-linear form of the Langmuir sorption equation. The values of the thermodynamic parameters (changes of enthalpy, free energy and entropy) were calculated from temperature dependent sorption isotherms and their values showed that the sorption of Ni2+ onto modified sepiolite was endothermic.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Sepiolite functionalized with N-[3-( trimethoxysilyl)propyl]-ethylenediamine triacetic acid trisodium salt. Part II: Sorption of Ni2+ from aqueous solutions
EP  - 208
IS  - 2
SP  - 197
VL  - 81
DO  - 10.2298/JSC150525086L
ER  - 

@article{
author = "Lazarević, Slavica and Janković-Častvan, Ivona and Jokić, Bojan and Janaćković, Đorđe and Petrović, Rada",
year = "2016",
abstract = "The sorption of Ni2+ on sepiolite functionalized by covalent grafting of N-[3-(trimethoxysilyl) propyl] ethylenediamine triacetic acid trisodium salt, MSEAS, was studied in batch experiments as a function of the initial metal concentration, the equilibration time, the pH value and the temperature. The modification of sepiolite resulted in enhanced Ni2+ retention with a capacity of 0.261 mmol g(-1) at 298 K. The retention of Ni2+ occurred dominantly by specific sorption and exchange of Mg2+ from the sepiolite structure. The sorption process followed pseudo-second-order kinetics. The sorption equilibrium results were best described by the non-linear form of the Langmuir sorption equation. The values of the thermodynamic parameters (changes of enthalpy, free energy and entropy) were calculated from temperature dependent sorption isotherms and their values showed that the sorption of Ni2+ onto modified sepiolite was endothermic.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Sepiolite functionalized with N-[3-( trimethoxysilyl)propyl]-ethylenediamine triacetic acid trisodium salt. Part II: Sorption of Ni2+ from aqueous solutions",
pages = "208-197",
number = "2",
volume = "81",
doi = "10.2298/JSC150525086L"
}

Lazarević, S., Janković-Častvan, I., Jokić, B., Janaćković, Đ.,& Petrović, R.. (2016). Sepiolite functionalized with N-[3-( trimethoxysilyl)propyl]-ethylenediamine triacetic acid trisodium salt. Part II: Sorption of Ni2+ from aqueous solutions. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 81(2), 197-208.
https://doi.org/10.2298/JSC150525086L

Lazarević S, Janković-Častvan I, Jokić B, Janaćković Đ, Petrović R. Sepiolite functionalized with N-[3-( trimethoxysilyl)propyl]-ethylenediamine triacetic acid trisodium salt. Part II: Sorption of Ni2+ from aqueous solutions. in Journal of the Serbian Chemical Society. 2016;81(2):197-208.
doi:10.2298/JSC150525086L .

Lazarević, Slavica, Janković-Častvan, Ivona, Jokić, Bojan, Janaćković, Đorđe, Petrović, Rada, "Sepiolite functionalized with N-[3-( trimethoxysilyl)propyl]-ethylenediamine triacetic acid trisodium salt. Part II: Sorption of Ni2+ from aqueous solutions" in Journal of the Serbian Chemical Society, 81, no. 2 (2016):197-208,
https://doi.org/10.2298/JSC150525086L . .

TY  - JOUR
AU  - Habish, Juma Amal
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Potkonjak, Branislav
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2895
AB  - In this study, the sorption of cadmium ions onto sepiolite modified with hydrated iron(III) oxide, Fe(III)-sepiolite, has been investigated in natural seawater, artificial seawater, aqueous solution of NaCl of the same ionic strength as the seawater and distilled water. The sorption experiments were performed as a function of the initial solution pH value, initial metal concentration, and equilibration time, using the batch method. The equilibrium sorption data were analyzed by the Langmuir, Freundlich and Sips isotherm models and the kinetics of sorption was analyzed using the pseudo-first-order and the pseudosecond-order kinetic models. The maximum sorption capacity and the strength of the sorbate-sorbent bonds at initial pH 7 were found to decrease in the following order: distilled water  gt  NaCl solution  gt  artificial seawater  gt  natural seawater. The values of parameter nS in the Sips model, which fitted the equilibrium sorption results best, showed that heterogeneity of the sorbent surface was the highest in distilled water and the lowest in natural seawater. The sorption kinetic data fitted well with the pseudo-second-order kinetic model, which suggests that the rate-limiting step in Cd2+ sorption onto Fe(III)-sepiolite could be chemisorption. The low desorption percentage in both distilled water and 0.001 M HNO3 indicated that sorption occurred mainly by chemisorption mechanisms.
AB  - U ovom radu je proučavana sorpcija jona kadmijuma iz prirodne morske vode, laboratorijski pripremljene morske vode, vodenog rastvora NaCl iste jonske jačine kao morska voda i destilovane vode, na sepiolitu modifikovanom hidratisanim gvožđe(III)-oksidom. Eksperimenti su izvedeni u šaržnim uslovima, pri različitim početnim pH vrednostima, početnim koncentracijama jona kadmijuma i vremenima uravnotežavanja. Rezultati sorpcije u ravnotežnim uslovima su analizirani primenom modela Langmira, Frojndliha i Sipsa, a kinetika sorpcije je analizirana kinetičkim modelima pseudo-prvog i pseudo-drugog reda. Utvrđeno je da maksimalni adsorpcioni kapacitet i jačina veza sorbat-sorbent pri početnoj pH 7 opadaju u nizu: destilovana voda  gt  NaCl rastvor  gt  laboratorijski pripremljena morska voda  gt  prirodna morska voda. Vrednosti parametra ns u modelu Sipsa, koji najbolje opisuje eksperimentalne rezultate, pokazuju da je heterogenost površine sorbenta najveća u destilovanoj vodi i najmanja u prirodnoj morskoj vodi. Rezultati ispitivanja kinetike sorpcije se bolje fituju modelom pseudo-drugog reda, što sugeriše da stupanj koji određuje brzinu sorpcije može biti hemisorpcija. Mali stepen desorpcije i u destilovanoj vodi i u 0.001 M HNO3 je potvrdio da se joni kadmijuma vezuju za modifikovani sepiolit uglavnom hemisorpcijom.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry & Chemical Engineering Quarterly
T1  - The effect of salinity on the sorption of cadmium ions from aqueous medium on Fe(III)-sepiolite
T1  - Uticaj saliniteta vode na sorpciju jona kadmijuma na Fe(III)-sepiolitu
EP  - 303
IS  - 2
SP  - 295
VL  - 21
DO  - 10.2298/CICEQ140130028H
ER  - 

@article{
author = "Habish, Juma Amal and Lazarević, Slavica and Janković-Častvan, Ivona and Potkonjak, Branislav and Janaćković, Đorđe and Petrović, Rada",
year = "2015",
abstract = "In this study, the sorption of cadmium ions onto sepiolite modified with hydrated iron(III) oxide, Fe(III)-sepiolite, has been investigated in natural seawater, artificial seawater, aqueous solution of NaCl of the same ionic strength as the seawater and distilled water. The sorption experiments were performed as a function of the initial solution pH value, initial metal concentration, and equilibration time, using the batch method. The equilibrium sorption data were analyzed by the Langmuir, Freundlich and Sips isotherm models and the kinetics of sorption was analyzed using the pseudo-first-order and the pseudosecond-order kinetic models. The maximum sorption capacity and the strength of the sorbate-sorbent bonds at initial pH 7 were found to decrease in the following order: distilled water  gt  NaCl solution  gt  artificial seawater  gt  natural seawater. The values of parameter nS in the Sips model, which fitted the equilibrium sorption results best, showed that heterogeneity of the sorbent surface was the highest in distilled water and the lowest in natural seawater. The sorption kinetic data fitted well with the pseudo-second-order kinetic model, which suggests that the rate-limiting step in Cd2+ sorption onto Fe(III)-sepiolite could be chemisorption. The low desorption percentage in both distilled water and 0.001 M HNO3 indicated that sorption occurred mainly by chemisorption mechanisms., U ovom radu je proučavana sorpcija jona kadmijuma iz prirodne morske vode, laboratorijski pripremljene morske vode, vodenog rastvora NaCl iste jonske jačine kao morska voda i destilovane vode, na sepiolitu modifikovanom hidratisanim gvožđe(III)-oksidom. Eksperimenti su izvedeni u šaržnim uslovima, pri različitim početnim pH vrednostima, početnim koncentracijama jona kadmijuma i vremenima uravnotežavanja. Rezultati sorpcije u ravnotežnim uslovima su analizirani primenom modela Langmira, Frojndliha i Sipsa, a kinetika sorpcije je analizirana kinetičkim modelima pseudo-prvog i pseudo-drugog reda. Utvrđeno je da maksimalni adsorpcioni kapacitet i jačina veza sorbat-sorbent pri početnoj pH 7 opadaju u nizu: destilovana voda  gt  NaCl rastvor  gt  laboratorijski pripremljena morska voda  gt  prirodna morska voda. Vrednosti parametra ns u modelu Sipsa, koji najbolje opisuje eksperimentalne rezultate, pokazuju da je heterogenost površine sorbenta najveća u destilovanoj vodi i najmanja u prirodnoj morskoj vodi. Rezultati ispitivanja kinetike sorpcije se bolje fituju modelom pseudo-drugog reda, što sugeriše da stupanj koji određuje brzinu sorpcije može biti hemisorpcija. Mali stepen desorpcije i u destilovanoj vodi i u 0.001 M HNO3 je potvrdio da se joni kadmijuma vezuju za modifikovani sepiolit uglavnom hemisorpcijom.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "The effect of salinity on the sorption of cadmium ions from aqueous medium on Fe(III)-sepiolite, Uticaj saliniteta vode na sorpciju jona kadmijuma na Fe(III)-sepiolitu",
pages = "303-295",
number = "2",
volume = "21",
doi = "10.2298/CICEQ140130028H"
}

Habish, J. A., Lazarević, S., Janković-Častvan, I., Potkonjak, B., Janaćković, Đ.,& Petrović, R.. (2015). The effect of salinity on the sorption of cadmium ions from aqueous medium on Fe(III)-sepiolite. in Chemical Industry & Chemical Engineering Quarterly
Association of the Chemical Engineers of Serbia., 21(2), 295-303.
https://doi.org/10.2298/CICEQ140130028H

Habish JA, Lazarević S, Janković-Častvan I, Potkonjak B, Janaćković Đ, Petrović R. The effect of salinity on the sorption of cadmium ions from aqueous medium on Fe(III)-sepiolite. in Chemical Industry & Chemical Engineering Quarterly. 2015;21(2):295-303.
doi:10.2298/CICEQ140130028H .

Habish, Juma Amal, Lazarević, Slavica, Janković-Častvan, Ivona, Potkonjak, Branislav, Janaćković, Đorđe, Petrović, Rada, "The effect of salinity on the sorption of cadmium ions from aqueous medium on Fe(III)-sepiolite" in Chemical Industry & Chemical Engineering Quarterly, 21, no. 2 (2015):295-303,
https://doi.org/10.2298/CICEQ140130028H . .

TY  - JOUR
AU  - Aysha, Ahribesh Ali
AU  - Lazarević, Slavica
AU  - Potkonjak, Branislav
AU  - Bjelajac, Anđelika
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2898
AB  - The sorption of Cd2+ from natural seawater, artificial seawater, distilled water and NaCl solution of the same ionic strength as the seawater onto zeolite modified by iron(III) oxide (Fe(III)-zeolite) was investigated. The sorption was found to be time, concentration and pH dependent. The sorption capacity at the initial pH 7 decreased in the following order: distilled water  gt  NaCl solution  gt  artificial seawater  gt  natural seawater. The isotherm study showed that Langmuir isotherm model could be adequately applied for the sorption in distilled water, indicating the homogeneous monolayer coverage at Fe(III)-zeolite surface, while the Freundlich isotherm model showed a better fit than the Langmuir model of the sorption data in saline waters, indicating multilayer heterogeneous coverage at the sorbent surface. The values of Freundlich parameter n suggested that the sorption was a favorable process and bonds between Cd2+ and Fe(III)-zeolite surface were stronger in NaCl solution than in natural and artificial seawater. Kinetics analysis showed that the mechanism of Cd2+ sorption from natural seawater differed from the sorption mechanism out of distilled water, NaCl solution and artificial seawater. The intra-particle diffusion kinetic model indicated that both boundary layer diffusion and intra-particle diffusion influenced the rate of sorption.
AB  - U ovom radu je ispitivana sorpcija Cd2+ iz prirodne morske vode, laboratorijski pripremljene morske vode, destilovane vode i rastvora NaCl, iste jonske jačine kao morska voda, na zeolitu modifikovanom gvožđe(III)-oksidom. Pokazano je da sorpcija zavisi od vremena, početne koncentracije Cd2+ i pH vrednosti. Sorpcioni kapacitet Fe(III)-zeolita za Cd2+ pri početnoj pH 7 opada u sledećem nizu: destilovana voda  gt  NaCl rastvor  gt  laboratorijski pripremljena morska voda  gt  prirodna morska voda. Modelovanje rezultata ispitivanja sorpcije u ravnotežnim uslovima je pokazalo da se adsorpcija iz destilovane vode može opisati Langmirovim modelom, što ukazuje na homogenu sorpciju i formiranje monosloja na površini Fe(III)-zeolita. Rezultati sorpcije iz slanih voda se bolje opisuju Frojndlihovim nego Langmirovim modelom, što ukazuje na višeslojnu sorpciju na heterogenoj površini sorbenta. Vrednosti Frojndlihovog parametra n pokazuju da je sorpcija Cd2+ na Fe(III)-zeolitu favorizovan proces i da su veze između Cd2+ i površine Fe(III)-zeolita jače u NaCl rastvoru nego u prirodnoj i laboratorijski pripremljenoj morskoj vodi. Kinetička analiza sorpcije je pokazala da se mehanizam sorpcije iz prirodne morske vode razlikuje od mehanizma sorpcije iz ostalih ispitivanih tipova vode. Kinetički model unutarčestične difuzije je pokazao da i difuzija kroz granični sloj i unutarčestična difuzija određuju brzinu sorpcije. Difuzija kroz granični sloj je u većoj meri zastupljena kod sorpcije iz morske vode nego u slučaju sorpcije iz drugih ispitivanih tipova vode.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Sorption of cadmium ions from saline waters onto Fe(III)-zeolite
T1  - Sorpcija jona kadmijuma iz slanih voda na Fe(III)-zeolitu
EP  - 260
IS  - 3
SP  - 253
VL  - 69
DO  - 10.2298/HEMIND140122038A
ER  - 

@article{
author = "Aysha, Ahribesh Ali and Lazarević, Slavica and Potkonjak, Branislav and Bjelajac, Anđelika and Janaćković, Đorđe and Petrović, Rada",
year = "2015",
abstract = "The sorption of Cd2+ from natural seawater, artificial seawater, distilled water and NaCl solution of the same ionic strength as the seawater onto zeolite modified by iron(III) oxide (Fe(III)-zeolite) was investigated. The sorption was found to be time, concentration and pH dependent. The sorption capacity at the initial pH 7 decreased in the following order: distilled water  gt  NaCl solution  gt  artificial seawater  gt  natural seawater. The isotherm study showed that Langmuir isotherm model could be adequately applied for the sorption in distilled water, indicating the homogeneous monolayer coverage at Fe(III)-zeolite surface, while the Freundlich isotherm model showed a better fit than the Langmuir model of the sorption data in saline waters, indicating multilayer heterogeneous coverage at the sorbent surface. The values of Freundlich parameter n suggested that the sorption was a favorable process and bonds between Cd2+ and Fe(III)-zeolite surface were stronger in NaCl solution than in natural and artificial seawater. Kinetics analysis showed that the mechanism of Cd2+ sorption from natural seawater differed from the sorption mechanism out of distilled water, NaCl solution and artificial seawater. The intra-particle diffusion kinetic model indicated that both boundary layer diffusion and intra-particle diffusion influenced the rate of sorption., U ovom radu je ispitivana sorpcija Cd2+ iz prirodne morske vode, laboratorijski pripremljene morske vode, destilovane vode i rastvora NaCl, iste jonske jačine kao morska voda, na zeolitu modifikovanom gvožđe(III)-oksidom. Pokazano je da sorpcija zavisi od vremena, početne koncentracije Cd2+ i pH vrednosti. Sorpcioni kapacitet Fe(III)-zeolita za Cd2+ pri početnoj pH 7 opada u sledećem nizu: destilovana voda  gt  NaCl rastvor  gt  laboratorijski pripremljena morska voda  gt  prirodna morska voda. Modelovanje rezultata ispitivanja sorpcije u ravnotežnim uslovima je pokazalo da se adsorpcija iz destilovane vode može opisati Langmirovim modelom, što ukazuje na homogenu sorpciju i formiranje monosloja na površini Fe(III)-zeolita. Rezultati sorpcije iz slanih voda se bolje opisuju Frojndlihovim nego Langmirovim modelom, što ukazuje na višeslojnu sorpciju na heterogenoj površini sorbenta. Vrednosti Frojndlihovog parametra n pokazuju da je sorpcija Cd2+ na Fe(III)-zeolitu favorizovan proces i da su veze između Cd2+ i površine Fe(III)-zeolita jače u NaCl rastvoru nego u prirodnoj i laboratorijski pripremljenoj morskoj vodi. Kinetička analiza sorpcije je pokazala da se mehanizam sorpcije iz prirodne morske vode razlikuje od mehanizma sorpcije iz ostalih ispitivanih tipova vode. Kinetički model unutarčestične difuzije je pokazao da i difuzija kroz granični sloj i unutarčestična difuzija određuju brzinu sorpcije. Difuzija kroz granični sloj je u većoj meri zastupljena kod sorpcije iz morske vode nego u slučaju sorpcije iz drugih ispitivanih tipova vode.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Sorption of cadmium ions from saline waters onto Fe(III)-zeolite, Sorpcija jona kadmijuma iz slanih voda na Fe(III)-zeolitu",
pages = "260-253",
number = "3",
volume = "69",
doi = "10.2298/HEMIND140122038A"
}

Aysha, A. A., Lazarević, S., Potkonjak, B., Bjelajac, A., Janaćković, Đ.,& Petrović, R.. (2015). Sorption of cadmium ions from saline waters onto Fe(III)-zeolite. in Hemijska industrija
Association of Chemical Engineers of Serbia., 69(3), 253-260.
https://doi.org/10.2298/HEMIND140122038A

Aysha AA, Lazarević S, Potkonjak B, Bjelajac A, Janaćković Đ, Petrović R. Sorption of cadmium ions from saline waters onto Fe(III)-zeolite. in Hemijska industrija. 2015;69(3):253-260.
doi:10.2298/HEMIND140122038A .

Aysha, Ahribesh Ali, Lazarević, Slavica, Potkonjak, Branislav, Bjelajac, Anđelika, Janaćković, Đorđe, Petrović, Rada, "Sorption of cadmium ions from saline waters onto Fe(III)-zeolite" in Hemijska industrija, 69, no. 3 (2015):253-260,
https://doi.org/10.2298/HEMIND140122038A . .

TY  - JOUR
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Lopičić, Zorica
AU  - Lazarević, Slavica
AU  - Stojanović, Mirjana
AU  - Uskoković, Dragan
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2918
AB  - A possibility to apply raw, powdered peach shells ( PS) as a biosorbent for water purification was studied. The PSs are locally available as a solid waste in a fruit juice factory; methylene blue (MB) was chosen as representative of common pollutants in textile industry wastewater. The phase composition of prepared particles was identified by XRD. The particle morphology was characterized by FE-SEM, while the size distribution was measured by a laser light-scattering particle size analyzer. The BET specific surface area was determined from N-2 adsorption/desorption experiments. The effect of operating parameters: the biosorbent amount (50-1000 mg/100 mL), contact time (10-180 min), solution pH (2-12) and initial concentration (10-100 ppm) on biosorption efficiency was examined. Optimal conditions for MB removal were found to be: the biosorbent amount of 400 mg/100 mL and pH 5.5. A high efficiency of MB removal was established after 180 min: 99% for [MB](i) = 10 ppm and 76% for [MB](i) = 100 ppm. Biosorption is well described by the Freundlich- and BET-type isotherms, implicating heterogeneous adsorption sites and interconnections between adsorbed molecules. The FTIR spectroscopy results indicate hydrogen bonding between the dye and the biomass. The obtained results shown that raw peach shell particles could be used as an efficient low-cost biosorbent for dye removal from water.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Environmental Chemical Engineering
T1  - Application of raw peach shell particles for removal of methylene blue
EP  - 724
IS  - 2
SP  - 716
VL  - 3
DO  - 10.1016/j.jece.2015.04.002
ER  - 

@article{
author = "Marković, Smilja and Stanković, Ana and Lopičić, Zorica and Lazarević, Slavica and Stojanović, Mirjana and Uskoković, Dragan",
year = "2015",
abstract = "A possibility to apply raw, powdered peach shells ( PS) as a biosorbent for water purification was studied. The PSs are locally available as a solid waste in a fruit juice factory; methylene blue (MB) was chosen as representative of common pollutants in textile industry wastewater. The phase composition of prepared particles was identified by XRD. The particle morphology was characterized by FE-SEM, while the size distribution was measured by a laser light-scattering particle size analyzer. The BET specific surface area was determined from N-2 adsorption/desorption experiments. The effect of operating parameters: the biosorbent amount (50-1000 mg/100 mL), contact time (10-180 min), solution pH (2-12) and initial concentration (10-100 ppm) on biosorption efficiency was examined. Optimal conditions for MB removal were found to be: the biosorbent amount of 400 mg/100 mL and pH 5.5. A high efficiency of MB removal was established after 180 min: 99% for [MB](i) = 10 ppm and 76% for [MB](i) = 100 ppm. Biosorption is well described by the Freundlich- and BET-type isotherms, implicating heterogeneous adsorption sites and interconnections between adsorbed molecules. The FTIR spectroscopy results indicate hydrogen bonding between the dye and the biomass. The obtained results shown that raw peach shell particles could be used as an efficient low-cost biosorbent for dye removal from water.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Environmental Chemical Engineering",
title = "Application of raw peach shell particles for removal of methylene blue",
pages = "724-716",
number = "2",
volume = "3",
doi = "10.1016/j.jece.2015.04.002"
}

Marković, S., Stanković, A., Lopičić, Z., Lazarević, S., Stojanović, M.,& Uskoković, D.. (2015). Application of raw peach shell particles for removal of methylene blue. in Journal of Environmental Chemical Engineering
Elsevier Sci Ltd, Oxford., 3(2), 716-724.
https://doi.org/10.1016/j.jece.2015.04.002

Marković S, Stanković A, Lopičić Z, Lazarević S, Stojanović M, Uskoković D. Application of raw peach shell particles for removal of methylene blue. in Journal of Environmental Chemical Engineering. 2015;3(2):716-724.
doi:10.1016/j.jece.2015.04.002 .

Marković, Smilja, Stanković, Ana, Lopičić, Zorica, Lazarević, Slavica, Stojanović, Mirjana, Uskoković, Dragan, "Application of raw peach shell particles for removal of methylene blue" in Journal of Environmental Chemical Engineering, 3, no. 2 (2015):716-724,
https://doi.org/10.1016/j.jece.2015.04.002 . .

TY  - JOUR
AU  - Mihajlović, Marija T.
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Kovač, Janez
AU  - Jokić, Bojan
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3035
AB  - The adsorption of Pb2+, Cd2+, and Zn2+ from equimolar multicomponent solutions onto natural and Fe(III)-modified zeolites was studied by batch experiments in order to determine the influence of the competitive effect on the efficiency ions removal at different initial concentrations and different temperatures. Kinetic and equilibrium studies showed that affinity of both zeolites was the highest for Pb2+ and much lower for Zn2+ and Cd2+. The competitive effect was negligible at lower concentrations, while Zn2+ and especially Cd2+ ions adsorption was suppressed as the concentrations were increased. Affinity of natural zeolite toward the ions was lower than that of the modified zeolite, as was shown for adsorption from single-component solutions. External film diffusion was the rate-controlling step at lower concentrations and for ions of higher affinity for the adsorbent, while intraparticle diffusion was dominant at higher concentrations and for ions of lower affinity for the adsorbent. The increasing spontaneity of the adsorption process with increasing temperature and the positive values of enthalpy of adsorption indicated the endothermic nature of the adsorption process. Structural investigations of the adsorbents loaded with Pb2+, Cd2+, and Zn2+ ions by X-ray photoelectron spectroscopy (XPS) confirmed the higher content of the ions in the surface and subsurface regions of the Fe(III)-modified than of the natural zeolite. XPS depth profiles of the loaded Fe(III)-modified zeolite showed that surface mechanisms of adsorption were dominant in the case of lead and cadmium, while zinc loading on the zeolite sample was governed mainly by an ion-exchange process.
PB  - Springer, New York
T2  - Clean Technologies and Environmental Policy
T1  - Kinetics, thermodynamics, and structural investigations on the removal of Pb2+, Cd2+, and Zn2+ from multicomponent solutions onto natural and Fe(III)-modified zeolites
EP  - 419
IS  - 2
SP  - 407
VL  - 17
DO  - 10.1007/s10098-014-0794-8
ER  - 

@article{
author = "Mihajlović, Marija T. and Lazarević, Slavica and Janković-Častvan, Ivona and Kovač, Janez and Jokić, Bojan and Janaćković, Đorđe and Petrović, Rada",
year = "2015",
abstract = "The adsorption of Pb2+, Cd2+, and Zn2+ from equimolar multicomponent solutions onto natural and Fe(III)-modified zeolites was studied by batch experiments in order to determine the influence of the competitive effect on the efficiency ions removal at different initial concentrations and different temperatures. Kinetic and equilibrium studies showed that affinity of both zeolites was the highest for Pb2+ and much lower for Zn2+ and Cd2+. The competitive effect was negligible at lower concentrations, while Zn2+ and especially Cd2+ ions adsorption was suppressed as the concentrations were increased. Affinity of natural zeolite toward the ions was lower than that of the modified zeolite, as was shown for adsorption from single-component solutions. External film diffusion was the rate-controlling step at lower concentrations and for ions of higher affinity for the adsorbent, while intraparticle diffusion was dominant at higher concentrations and for ions of lower affinity for the adsorbent. The increasing spontaneity of the adsorption process with increasing temperature and the positive values of enthalpy of adsorption indicated the endothermic nature of the adsorption process. Structural investigations of the adsorbents loaded with Pb2+, Cd2+, and Zn2+ ions by X-ray photoelectron spectroscopy (XPS) confirmed the higher content of the ions in the surface and subsurface regions of the Fe(III)-modified than of the natural zeolite. XPS depth profiles of the loaded Fe(III)-modified zeolite showed that surface mechanisms of adsorption were dominant in the case of lead and cadmium, while zinc loading on the zeolite sample was governed mainly by an ion-exchange process.",
publisher = "Springer, New York",
journal = "Clean Technologies and Environmental Policy",
title = "Kinetics, thermodynamics, and structural investigations on the removal of Pb2+, Cd2+, and Zn2+ from multicomponent solutions onto natural and Fe(III)-modified zeolites",
pages = "419-407",
number = "2",
volume = "17",
doi = "10.1007/s10098-014-0794-8"
}

Mihajlović, M. T., Lazarević, S., Janković-Častvan, I., Kovač, J., Jokić, B., Janaćković, Đ.,& Petrović, R.. (2015). Kinetics, thermodynamics, and structural investigations on the removal of Pb2+, Cd2+, and Zn2+ from multicomponent solutions onto natural and Fe(III)-modified zeolites. in Clean Technologies and Environmental Policy
Springer, New York., 17(2), 407-419.
https://doi.org/10.1007/s10098-014-0794-8

Mihajlović MT, Lazarević S, Janković-Častvan I, Kovač J, Jokić B, Janaćković Đ, Petrović R. Kinetics, thermodynamics, and structural investigations on the removal of Pb2+, Cd2+, and Zn2+ from multicomponent solutions onto natural and Fe(III)-modified zeolites. in Clean Technologies and Environmental Policy. 2015;17(2):407-419.
doi:10.1007/s10098-014-0794-8 .

Mihajlović, Marija T., Lazarević, Slavica, Janković-Častvan, Ivona, Kovač, Janez, Jokić, Bojan, Janaćković, Đorđe, Petrović, Rada, "Kinetics, thermodynamics, and structural investigations on the removal of Pb2+, Cd2+, and Zn2+ from multicomponent solutions onto natural and Fe(III)-modified zeolites" in Clean Technologies and Environmental Policy, 17, no. 2 (2015):407-419,
https://doi.org/10.1007/s10098-014-0794-8 . .

TY  - JOUR
AU  - Janković-Častvan, Ivona
AU  - Lazarević, Slavica
AU  - Stojanović, Dušica
AU  - Živković, Predrag M.
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3049
AB  - The modern and rapidly developing paper and board industry requires more efficient agents for the surface of paper in order to improve the mechanical properties. The starch coating used for the reinforcement of schrenz (110g/m(2)) contained ultrasonicated nanoparticles of the mineral sepiolite. The viscosity of starch dispersions modified with different concentration of sepiolite was followed at the temperature of the coating on schrenz. The values of the breaking length, bursting strength and CMT-strength of the paper reinforced with modified starch were increased by up to 20%. The viscoelastic properties as storage modulus were increased, too. Scanning electron microscopy of the samples showed deagglomeration and homogeneity of the sepiolite nanoparticles.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Starch-Starke
T1  - Improvement of the mechanical properties of paper by starch coatings modified with sepiolite nanoparticles
EP  - 380
IS  - 3-4
SP  - 373
VL  - 67
DO  - 10.1002/star.201400171
ER  - 

@article{
author = "Janković-Častvan, Ivona and Lazarević, Slavica and Stojanović, Dušica and Živković, Predrag M. and Petrović, Rada and Janaćković, Đorđe",
year = "2015",
abstract = "The modern and rapidly developing paper and board industry requires more efficient agents for the surface of paper in order to improve the mechanical properties. The starch coating used for the reinforcement of schrenz (110g/m(2)) contained ultrasonicated nanoparticles of the mineral sepiolite. The viscosity of starch dispersions modified with different concentration of sepiolite was followed at the temperature of the coating on schrenz. The values of the breaking length, bursting strength and CMT-strength of the paper reinforced with modified starch were increased by up to 20%. The viscoelastic properties as storage modulus were increased, too. Scanning electron microscopy of the samples showed deagglomeration and homogeneity of the sepiolite nanoparticles.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Starch-Starke",
title = "Improvement of the mechanical properties of paper by starch coatings modified with sepiolite nanoparticles",
pages = "380-373",
number = "3-4",
volume = "67",
doi = "10.1002/star.201400171"
}

Janković-Častvan, I., Lazarević, S., Stojanović, D., Živković, P. M., Petrović, R.,& Janaćković, Đ.. (2015). Improvement of the mechanical properties of paper by starch coatings modified with sepiolite nanoparticles. in Starch-Starke
Wiley-VCH Verlag Gmbh, Weinheim., 67(3-4), 373-380.
https://doi.org/10.1002/star.201400171

Janković-Častvan I, Lazarević S, Stojanović D, Živković PM, Petrović R, Janaćković Đ. Improvement of the mechanical properties of paper by starch coatings modified with sepiolite nanoparticles. in Starch-Starke. 2015;67(3-4):373-380.
doi:10.1002/star.201400171 .

Janković-Častvan, Ivona, Lazarević, Slavica, Stojanović, Dušica, Živković, Predrag M., Petrović, Rada, Janaćković, Đorđe, "Improvement of the mechanical properties of paper by starch coatings modified with sepiolite nanoparticles" in Starch-Starke, 67, no. 3-4 (2015):373-380,
https://doi.org/10.1002/star.201400171 . .

TY  - JOUR
AU  - Amanullah, R.
AU  - Johansson, J.
AU  - Goobar, A.
AU  - Ferretti, R.
AU  - Papadogiannakis, S.
AU  - Petrushevska, T.
AU  - Brown, P. J.
AU  - Cao, Y.
AU  - Contreras, C.
AU  - Dahle, H.
AU  - Elias-Rosa, N.
AU  - Fynbo, J. P. U.
AU  - Gorosabel, J.
AU  - Guaita, L.
AU  - Hangard, L.
AU  - Howell, D. A.
AU  - Hsiao, E. Y.
AU  - Kankare, E.
AU  - Kasliwal, M.
AU  - Leloudas, G.
AU  - Lundqvist, P.
AU  - Mattila, S.
AU  - Nugent, P.
AU  - Phillips, M. M.
AU  - Sandberg, A.
AU  - Stanishev, V.
AU  - Sullivan, M.
AU  - Taddia, F.
AU  - Ostlin, G.
AU  - Asadi, S.
AU  - Herrero-Illana, R.
AU  - Jensen, J. J.
AU  - Karhunen, K.
AU  - Lazarević, Slavica
AU  - Varenius, E.
AU  - Santos, P.
AU  - Sridhar, S. Seethapuram
AU  - Wallstrom, S. H. J.
AU  - Wiegert, J.
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3073
AB  - We present ultraviolet (UV) observations of six nearby Type Ia supernovae (SNe Ia) obtained with the Hubble Space Telescope, three of which were also observed in the near-IR (NIR) with Wide-Field Camera 3. UV observations with the Swift satellite, as well as ground-based optical and NIR data provide complementary information. The combined data set covers the wavelength range 0.2-2 mu m. By also including archival data of SN 2014J, we analyse a sample spanning observed colour excesses up to E(B - V) = 1.4 mag. We study the wavelength-dependent extinction of each individual SN and find a diversity of reddening laws when characterized by the total-to-selective extinction R-V. In particular, we note that for the two SNe with E(B - V) greater than or similar to 1 mag, for which the colour excess is dominated by dust extinction, we find R-V = 1.4 +/- 0.1 and R-V = 2.8 +/- 0.1. Adding UV photometry reduces the uncertainty of fitted R-V by similar to 50 per cent allowing us to also measure R-V of individual low-extinction objects which point to a similar diversity, currently not accounted for in the analyses when SNe Ia are used for studying the expansion history of the Universe.
PB  - Oxford Univ Press, Oxford
T2  - Monthly Notices of the Royal Astronomical Society
T1  - Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m
EP  - 3328
IS  - 3
SP  - 3300
VL  - 453
DO  - 10.1093/mnras/stv1505
ER  - 

@article{
author = "Amanullah, R. and Johansson, J. and Goobar, A. and Ferretti, R. and Papadogiannakis, S. and Petrushevska, T. and Brown, P. J. and Cao, Y. and Contreras, C. and Dahle, H. and Elias-Rosa, N. and Fynbo, J. P. U. and Gorosabel, J. and Guaita, L. and Hangard, L. and Howell, D. A. and Hsiao, E. Y. and Kankare, E. and Kasliwal, M. and Leloudas, G. and Lundqvist, P. and Mattila, S. and Nugent, P. and Phillips, M. M. and Sandberg, A. and Stanishev, V. and Sullivan, M. and Taddia, F. and Ostlin, G. and Asadi, S. and Herrero-Illana, R. and Jensen, J. J. and Karhunen, K. and Lazarević, Slavica and Varenius, E. and Santos, P. and Sridhar, S. Seethapuram and Wallstrom, S. H. J. and Wiegert, J.",
year = "2015",
abstract = "We present ultraviolet (UV) observations of six nearby Type Ia supernovae (SNe Ia) obtained with the Hubble Space Telescope, three of which were also observed in the near-IR (NIR) with Wide-Field Camera 3. UV observations with the Swift satellite, as well as ground-based optical and NIR data provide complementary information. The combined data set covers the wavelength range 0.2-2 mu m. By also including archival data of SN 2014J, we analyse a sample spanning observed colour excesses up to E(B - V) = 1.4 mag. We study the wavelength-dependent extinction of each individual SN and find a diversity of reddening laws when characterized by the total-to-selective extinction R-V. In particular, we note that for the two SNe with E(B - V) greater than or similar to 1 mag, for which the colour excess is dominated by dust extinction, we find R-V = 1.4 +/- 0.1 and R-V = 2.8 +/- 0.1. Adding UV photometry reduces the uncertainty of fitted R-V by similar to 50 per cent allowing us to also measure R-V of individual low-extinction objects which point to a similar diversity, currently not accounted for in the analyses when SNe Ia are used for studying the expansion history of the Universe.",
publisher = "Oxford Univ Press, Oxford",
journal = "Monthly Notices of the Royal Astronomical Society",
title = "Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m",
pages = "3328-3300",
number = "3",
volume = "453",
doi = "10.1093/mnras/stv1505"
}

Amanullah, R., Johansson, J., Goobar, A., Ferretti, R., Papadogiannakis, S., Petrushevska, T., Brown, P. J., Cao, Y., Contreras, C., Dahle, H., Elias-Rosa, N., Fynbo, J. P. U., Gorosabel, J., Guaita, L., Hangard, L., Howell, D. A., Hsiao, E. Y., Kankare, E., Kasliwal, M., Leloudas, G., Lundqvist, P., Mattila, S., Nugent, P., Phillips, M. M., Sandberg, A., Stanishev, V., Sullivan, M., Taddia, F., Ostlin, G., Asadi, S., Herrero-Illana, R., Jensen, J. J., Karhunen, K., Lazarević, S., Varenius, E., Santos, P., Sridhar, S. S., Wallstrom, S. H. J.,& Wiegert, J.. (2015). Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m. in Monthly Notices of the Royal Astronomical Society
Oxford Univ Press, Oxford., 453(3), 3300-3328.
https://doi.org/10.1093/mnras/stv1505

Amanullah R, Johansson J, Goobar A, Ferretti R, Papadogiannakis S, Petrushevska T, Brown PJ, Cao Y, Contreras C, Dahle H, Elias-Rosa N, Fynbo JPU, Gorosabel J, Guaita L, Hangard L, Howell DA, Hsiao EY, Kankare E, Kasliwal M, Leloudas G, Lundqvist P, Mattila S, Nugent P, Phillips MM, Sandberg A, Stanishev V, Sullivan M, Taddia F, Ostlin G, Asadi S, Herrero-Illana R, Jensen JJ, Karhunen K, Lazarević S, Varenius E, Santos P, Sridhar SS, Wallstrom SHJ, Wiegert J. Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m. in Monthly Notices of the Royal Astronomical Society. 2015;453(3):3300-3328.
doi:10.1093/mnras/stv1505 .

Amanullah, R., Johansson, J., Goobar, A., Ferretti, R., Papadogiannakis, S., Petrushevska, T., Brown, P. J., Cao, Y., Contreras, C., Dahle, H., Elias-Rosa, N., Fynbo, J. P. U., Gorosabel, J., Guaita, L., Hangard, L., Howell, D. A., Hsiao, E. Y., Kankare, E., Kasliwal, M., Leloudas, G., Lundqvist, P., Mattila, S., Nugent, P., Phillips, M. M., Sandberg, A., Stanishev, V., Sullivan, M., Taddia, F., Ostlin, G., Asadi, S., Herrero-Illana, R., Jensen, J. J., Karhunen, K., Lazarević, Slavica, Varenius, E., Santos, P., Sridhar, S. Seethapuram, Wallstrom, S. H. J., Wiegert, J., "Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m" in Monthly Notices of the Royal Astronomical Society, 453, no. 3 (2015):3300-3328,
https://doi.org/10.1093/mnras/stv1505 . .

TY  - JOUR
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Jokić, Bojan
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3112
AB  - Natural sepiolite from Andrici (Serbia) was functionalized by covalent grafting of N-[3-(trimethoxysilyl)propyl]ethylenediamine triacetic acid trisodium salt onto the Si-OH sepiolite groups. The functionalized material, MSEAS, was characterized by determination of the phase composition by X-ray diffraction (XRD) analysis, analysis of the morphological characteristics by scanning electron microscopy (SEM), using Fourier transform infrared (FTIR) spectroscopy, differential thermal analyses (DTA), determination of the specific surface areas and pore size distribution using the BET method and point of zero charge (pH(pzc)) determination. The crystal structure of sepiolite did not change significantly upon surface modification. The FT-IR and DTA analyses confirmed that the modified sample maintained the basic structure of sepiolite and the presence of organic groups in the functionalized sepiolite sample. The point of zero charge of MSEAS in KNO3 solutions of different concentrations, determined by the batch technique, was at pH 7.0 +/- 0.1.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Sepiolite functionalized with N-[3-(trimethoxysilyl)propyl]ethylenediamine triacetic acid trisodium salt. Part I: Preparation and characterization
EP  - 1202
IS  - 9
SP  - 1193
VL  - 80
DO  - 10.2298/JSC150219038L
ER  - 

@article{
author = "Lazarević, Slavica and Janković-Častvan, Ivona and Jokić, Bojan and Janaćković, Đorđe and Petrović, Rada",
year = "2015",
abstract = "Natural sepiolite from Andrici (Serbia) was functionalized by covalent grafting of N-[3-(trimethoxysilyl)propyl]ethylenediamine triacetic acid trisodium salt onto the Si-OH sepiolite groups. The functionalized material, MSEAS, was characterized by determination of the phase composition by X-ray diffraction (XRD) analysis, analysis of the morphological characteristics by scanning electron microscopy (SEM), using Fourier transform infrared (FTIR) spectroscopy, differential thermal analyses (DTA), determination of the specific surface areas and pore size distribution using the BET method and point of zero charge (pH(pzc)) determination. The crystal structure of sepiolite did not change significantly upon surface modification. The FT-IR and DTA analyses confirmed that the modified sample maintained the basic structure of sepiolite and the presence of organic groups in the functionalized sepiolite sample. The point of zero charge of MSEAS in KNO3 solutions of different concentrations, determined by the batch technique, was at pH 7.0 +/- 0.1.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Sepiolite functionalized with N-[3-(trimethoxysilyl)propyl]ethylenediamine triacetic acid trisodium salt. Part I: Preparation and characterization",
pages = "1202-1193",
number = "9",
volume = "80",
doi = "10.2298/JSC150219038L"
}

Lazarević, S., Janković-Častvan, I., Jokić, B., Janaćković, Đ.,& Petrović, R.. (2015). Sepiolite functionalized with N-[3-(trimethoxysilyl)propyl]ethylenediamine triacetic acid trisodium salt. Part I: Preparation and characterization. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 80(9), 1193-1202.
https://doi.org/10.2298/JSC150219038L

Lazarević S, Janković-Častvan I, Jokić B, Janaćković Đ, Petrović R. Sepiolite functionalized with N-[3-(trimethoxysilyl)propyl]ethylenediamine triacetic acid trisodium salt. Part I: Preparation and characterization. in Journal of the Serbian Chemical Society. 2015;80(9):1193-1202.
doi:10.2298/JSC150219038L .

Lazarević, Slavica, Janković-Častvan, Ivona, Jokić, Bojan, Janaćković, Đorđe, Petrović, Rada, "Sepiolite functionalized with N-[3-(trimethoxysilyl)propyl]ethylenediamine triacetic acid trisodium salt. Part I: Preparation and characterization" in Journal of the Serbian Chemical Society, 80, no. 9 (2015):1193-1202,
https://doi.org/10.2298/JSC150219038L . .

TY  - JOUR
AU  - Knežević, Nikola Ž.
AU  - Milenković, Sanja
AU  - Jović, Danica
AU  - Lazarević, Slavica
AU  - Mrđanović, Jasminka
AU  - Đorđević, Aleksandar
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3130
AB  - Novel nanocomposite containing fullerenol nanoparticles (FNP) and porous silica nanoparticles (PSNs) was constructed and characterized. The capability of FNP to serve as a pore-capping agent and for entrapping 9-aminoacridine (9-AA) inside the pores of the PSN material was also demonstrated. Nitrogen sorption measurements evidence the successful capping of the silica pores while thermogravimetric analysis of FNP loaded PSN indicates the existence of pore-loaded fullerenol molecules. Higher amount of the drug release was noted by exposing the material to weakly acidic conditions in comparison to physiological pH, which may find application in targeted treatment of weakly acidic tumor tissues.
PB  - Hindawi Ltd, London
T2  - Advances in Materials Science and Engineering
T1  - Fullerenol-Capped Porous Silica Nanoparticles for pH-Responsive Drug Delivery
VL  - 2015
DO  - 10.1155/2015/567350
ER  - 

@article{
author = "Knežević, Nikola Ž. and Milenković, Sanja and Jović, Danica and Lazarević, Slavica and Mrđanović, Jasminka and Đorđević, Aleksandar",
year = "2015",
abstract = "Novel nanocomposite containing fullerenol nanoparticles (FNP) and porous silica nanoparticles (PSNs) was constructed and characterized. The capability of FNP to serve as a pore-capping agent and for entrapping 9-aminoacridine (9-AA) inside the pores of the PSN material was also demonstrated. Nitrogen sorption measurements evidence the successful capping of the silica pores while thermogravimetric analysis of FNP loaded PSN indicates the existence of pore-loaded fullerenol molecules. Higher amount of the drug release was noted by exposing the material to weakly acidic conditions in comparison to physiological pH, which may find application in targeted treatment of weakly acidic tumor tissues.",
publisher = "Hindawi Ltd, London",
journal = "Advances in Materials Science and Engineering",
title = "Fullerenol-Capped Porous Silica Nanoparticles for pH-Responsive Drug Delivery",
volume = "2015",
doi = "10.1155/2015/567350"
}

Knežević, N. Ž., Milenković, S., Jović, D., Lazarević, S., Mrđanović, J.,& Đorđević, A.. (2015). Fullerenol-Capped Porous Silica Nanoparticles for pH-Responsive Drug Delivery. in Advances in Materials Science and Engineering
Hindawi Ltd, London., 2015.
https://doi.org/10.1155/2015/567350

Knežević NŽ, Milenković S, Jović D, Lazarević S, Mrđanović J, Đorđević A. Fullerenol-Capped Porous Silica Nanoparticles for pH-Responsive Drug Delivery. in Advances in Materials Science and Engineering. 2015;2015.
doi:10.1155/2015/567350 .

Knežević, Nikola Ž., Milenković, Sanja, Jović, Danica, Lazarević, Slavica, Mrđanović, Jasminka, Đorđević, Aleksandar, "Fullerenol-Capped Porous Silica Nanoparticles for pH-Responsive Drug Delivery" in Advances in Materials Science and Engineering, 2015 (2015),
https://doi.org/10.1155/2015/567350 . .