TY  - JOUR
AU  - Daković, Aleksandra
AU  - Kragović, Milan
AU  - Rottinghaus, George E.
AU  - Ledoux, David R.
AU  - Butkeraitis, Paula
AU  - Vojislavljević, Dubravka Z.
AU  - Zarić, Snežana
AU  - Stamenić, Ljubišav
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/215
AB  - A zinc-exchanged montmorillonite (Zn-MONT) was prepared from a natural montmorillonite (MONT) and the adsorption of aflatoxin B-1 (AFB(1)) was investigated at pH 3 and 7. Characterization of Zn-MONT was done by determination of chemical composition, the point of the zero charge (pH(pzc)), thermal (DTA/TGA/DTG) and X-ray powder diffraction (XRPD) analysis. Adsorption of AFB(1) (C-0 = 4 ppm) by Zn-MONT, at different solid/liquid ratios (10, 1 and 0.5 g L-1), at pH 3 or 7, showed that its adsorption was high (over 96%) and independent of pH, similar to MONT. No desorption of AFB(1) from MONT-AFB(1) and Zn-MONT-AFB(1) complexes occurred at pH 6.5, suggesting strong binding of AFB(1) by both adsorbents. Furthermore, AFB(1) adsorption by Zn-MONT followed a nonlinear (Langmuir) type of isotherm at pH 3 with a calculated maximum capacity of 60.17 mg g(-1). The stability of MONT-AFB(1) and Zn-MONT-AFB(1) complexes was evaluated by calculating the binding energies between AFB(1) and metal cations using quantum chemical methods. The evaluated interaction energies of AFB(1) with hydrated Zn2+, Mg2+, and Ca2+ cations showed that the strongest interaction was the interaction of the Zn2+ system, -70.2 kcal mol(-1), whereas energies for Mg-2 and Ca2+ systems were -68.8 and -62.9 kcal mol(-1), respectively. The results indicate that Zn-MONT can be suitable for potential practical application as both, an antibacterial and an aflatoxin binding agent.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent
EP  - 220
IS  - 1
SP  - 213
VL  - 137
DO  - 10.1016/j.matchemphys.2012.09.010
UR  - conv_640
ER  - 

@article{
author = "Daković, Aleksandra and Kragović, Milan and Rottinghaus, George E. and Ledoux, David R. and Butkeraitis, Paula and Vojislavljević, Dubravka Z. and Zarić, Snežana and Stamenić, Ljubišav",
year = "2012",
abstract = "A zinc-exchanged montmorillonite (Zn-MONT) was prepared from a natural montmorillonite (MONT) and the adsorption of aflatoxin B-1 (AFB(1)) was investigated at pH 3 and 7. Characterization of Zn-MONT was done by determination of chemical composition, the point of the zero charge (pH(pzc)), thermal (DTA/TGA/DTG) and X-ray powder diffraction (XRPD) analysis. Adsorption of AFB(1) (C-0 = 4 ppm) by Zn-MONT, at different solid/liquid ratios (10, 1 and 0.5 g L-1), at pH 3 or 7, showed that its adsorption was high (over 96%) and independent of pH, similar to MONT. No desorption of AFB(1) from MONT-AFB(1) and Zn-MONT-AFB(1) complexes occurred at pH 6.5, suggesting strong binding of AFB(1) by both adsorbents. Furthermore, AFB(1) adsorption by Zn-MONT followed a nonlinear (Langmuir) type of isotherm at pH 3 with a calculated maximum capacity of 60.17 mg g(-1). The stability of MONT-AFB(1) and Zn-MONT-AFB(1) complexes was evaluated by calculating the binding energies between AFB(1) and metal cations using quantum chemical methods. The evaluated interaction energies of AFB(1) with hydrated Zn2+, Mg2+, and Ca2+ cations showed that the strongest interaction was the interaction of the Zn2+ system, -70.2 kcal mol(-1), whereas energies for Mg-2 and Ca2+ systems were -68.8 and -62.9 kcal mol(-1), respectively. The results indicate that Zn-MONT can be suitable for potential practical application as both, an antibacterial and an aflatoxin binding agent.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent",
pages = "220-213",
number = "1",
volume = "137",
doi = "10.1016/j.matchemphys.2012.09.010",
url = "conv_640"
}

Daković, A., Kragović, M., Rottinghaus, G. E., Ledoux, D. R., Butkeraitis, P., Vojislavljević, D. Z., Zarić, S.,& Stamenić, L.. (2012). Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 137(1), 213-220.
https://doi.org/10.1016/j.matchemphys.2012.09.010
conv_640

Daković A, Kragović M, Rottinghaus GE, Ledoux DR, Butkeraitis P, Vojislavljević DZ, Zarić S, Stamenić L. Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent. in Materials Chemistry and Physics. 2012;137(1):213-220.
doi:10.1016/j.matchemphys.2012.09.010
conv_640 .

Daković, Aleksandra, Kragović, Milan, Rottinghaus, George E., Ledoux, David R., Butkeraitis, Paula, Vojislavljević, Dubravka Z., Zarić, Snežana, Stamenić, Ljubišav, "Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent" in Materials Chemistry and Physics, 137, no. 1 (2012):213-220,
https://doi.org/10.1016/j.matchemphys.2012.09.010 .,
conv_640 .

TY  - JOUR
AU  - Daković, Aleksandra
AU  - Matijašević, Srđan
AU  - Rottinghaus, George E.
AU  - Ledoux, David R.
AU  - Butkeraitis, Paula
AU  - Sekulić, Živko
PY  - 2008
UR  - https://ritnms.itnms.ac.rs/handle/123456789/131
AB  - Adsorption of aflatoxin B-1 (AFB1) by natural montmorillonite (MONT) and montmorillonite modified with copper ions (Cu-MONT) was investigated. Both MONTs were characterized using the X-ray powder diffraction (XRPD) analysis, thermal analysis (DTA/TGA) and scanning electron miscroscopy/electron dispersive spectroscopy (SEM/EDS). The results of XRPD and SEM/EDS analyses of Cu-MONT suggested partial ion exchange of native inorganic cations in MONT with copper occurred. Investigation of AFB1 adsorption by MONT and Cu-MONT, at pH 3, 7 or 9, showed that adsorption of this toxin by both MONTs was high (over 93%). Since AFB1 is nonionizable, no differences in AFB1 adsorption by both MONTs, at different pHs, were observed, as expected. Futhermore, it was determined that adsorption of AFB1 by both MONTs followed a non-linear (Langmuir) type of isotherm, at pH 3. The calculated maximum adsorbed amounts of AFB1 by MONT (40.982 mg/g) and Cu-MONT (66.225 mg/g), derived from Langmuir plots of isotherms, indicate that Cu-MONT was much effective in adsorbing AFB1. Since, the main cation in an exchangeable position in MONT is calcium, and in Cu-MONT both calcium and copper, the fact that ion exchange of inorganic cations in MONT with copper increases adsorption of AFB1 suggests that additional interactions between AFB1 and copper ions in Cu-MONT caused greater adsorption.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Aflatoxin B-1 adsorption by natural and copper modified montmorillonite
EP  - 25
IS  - 1
SP  - 20
VL  - 66
DO  - 10.1016/j.colsurfb.2008.05.008
UR  - conv_550
ER  - 

@article{
author = "Daković, Aleksandra and Matijašević, Srđan and Rottinghaus, George E. and Ledoux, David R. and Butkeraitis, Paula and Sekulić, Živko",
year = "2008",
abstract = "Adsorption of aflatoxin B-1 (AFB1) by natural montmorillonite (MONT) and montmorillonite modified with copper ions (Cu-MONT) was investigated. Both MONTs were characterized using the X-ray powder diffraction (XRPD) analysis, thermal analysis (DTA/TGA) and scanning electron miscroscopy/electron dispersive spectroscopy (SEM/EDS). The results of XRPD and SEM/EDS analyses of Cu-MONT suggested partial ion exchange of native inorganic cations in MONT with copper occurred. Investigation of AFB1 adsorption by MONT and Cu-MONT, at pH 3, 7 or 9, showed that adsorption of this toxin by both MONTs was high (over 93%). Since AFB1 is nonionizable, no differences in AFB1 adsorption by both MONTs, at different pHs, were observed, as expected. Futhermore, it was determined that adsorption of AFB1 by both MONTs followed a non-linear (Langmuir) type of isotherm, at pH 3. The calculated maximum adsorbed amounts of AFB1 by MONT (40.982 mg/g) and Cu-MONT (66.225 mg/g), derived from Langmuir plots of isotherms, indicate that Cu-MONT was much effective in adsorbing AFB1. Since, the main cation in an exchangeable position in MONT is calcium, and in Cu-MONT both calcium and copper, the fact that ion exchange of inorganic cations in MONT with copper increases adsorption of AFB1 suggests that additional interactions between AFB1 and copper ions in Cu-MONT caused greater adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Aflatoxin B-1 adsorption by natural and copper modified montmorillonite",
pages = "25-20",
number = "1",
volume = "66",
doi = "10.1016/j.colsurfb.2008.05.008",
url = "conv_550"
}

Daković, A., Matijašević, S., Rottinghaus, G. E., Ledoux, D. R., Butkeraitis, P.,& Sekulić, Ž.. (2008). Aflatoxin B-1 adsorption by natural and copper modified montmorillonite. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 66(1), 20-25.
https://doi.org/10.1016/j.colsurfb.2008.05.008
conv_550

Daković A, Matijašević S, Rottinghaus GE, Ledoux DR, Butkeraitis P, Sekulić Ž. Aflatoxin B-1 adsorption by natural and copper modified montmorillonite. in Colloids and Surfaces B-Biointerfaces. 2008;66(1):20-25.
doi:10.1016/j.colsurfb.2008.05.008
conv_550 .

Daković, Aleksandra, Matijašević, Srđan, Rottinghaus, George E., Ledoux, David R., Butkeraitis, Paula, Sekulić, Živko, "Aflatoxin B-1 adsorption by natural and copper modified montmorillonite" in Colloids and Surfaces B-Biointerfaces, 66, no. 1 (2008):20-25,
https://doi.org/10.1016/j.colsurfb.2008.05.008 .,
conv_550 .