Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent
Samo za registrovane korisnike
2012
Autori
Dakovic, AleksandraKragovic, Milan
Rottinghaus, George E.
Ledoux, David R.
Butkeraitis, Paula
Vojislavljević-Vasilev, Dubravka
Zarić, Snežana D.
Stamenic, Ljubisav
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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 cation...s 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. (C) 2012 Elsevier B.V. All rights reserved.
Ključne reči:
Composite materials / Adsorption / Desorption / Chemical techniquesIzvor:
Materials Chemistry and Physics, 2012, 137, 1, 213-220Izdavač:
- Elsevier Science Sa, Lausanne
Finansiranje / projekti:
- Porozni materijali na bazi oksida u zaštiti životne sredine od genotoksičnih supstanci (RS-MESTD-Basic Research (BR or ON)-172018)
- Osvajanje tehnoloških postupaka dobijanja ekoloških materijala na bazi nemetaličnih mineralnih sirovina (RS-MESTD-Technological Development (TD or TR)-34013)
DOI: 10.1016/j.matchemphys.2012.09.010
ISSN: 0254-0584
WoS: 000312624100033
Scopus: 2-s2.0-84868213443
Institucija/grupa
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Dakovic, Aleksandra AU - Kragovic, Milan AU - Rottinghaus, George E. AU - Ledoux, David R. AU - Butkeraitis, Paula AU - Vojislavljević-Vasilev, Dubravka AU - Zarić, Snežana D. AU - Stamenic, Ljubisav PY - 2012 UR - https://cherry.chem.bg.ac.rs/handle/123456789/1564 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. (C) 2012 Elsevier B.V. All rights reserved. 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 VL - 137 IS - 1 SP - 213 EP - 220 DO - 10.1016/j.matchemphys.2012.09.010 ER -
@article{ author = "Dakovic, Aleksandra and Kragovic, Milan and Rottinghaus, George E. and Ledoux, David R. and Butkeraitis, Paula and Vojislavljević-Vasilev, Dubravka and Zarić, Snežana D. and Stamenic, Ljubisav", 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. (C) 2012 Elsevier B.V. All rights reserved.", 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", volume = "137", number = "1", pages = "213-220", doi = "10.1016/j.matchemphys.2012.09.010" }
Dakovic, A., Kragovic, M., Rottinghaus, G. E., Ledoux, D. R., Butkeraitis, P., Vojislavljević-Vasilev, D., Zarić, S. D.,& Stamenic, 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
Dakovic A, Kragovic M, Rottinghaus GE, Ledoux DR, Butkeraitis P, Vojislavljević-Vasilev D, Zarić SD, Stamenic 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 .
Dakovic, Aleksandra, Kragovic, Milan, Rottinghaus, George E., Ledoux, David R., Butkeraitis, Paula, Vojislavljević-Vasilev, Dubravka, Zarić, Snežana D., Stamenic, Ljubisav, "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 . .