dc.creator | Daković, Aleksandra | |
dc.creator | Kragović, Milan | |
dc.creator | Rottinghaus, George E. | |
dc.creator | Ledoux, David R. | |
dc.creator | Butkeraitis, Paula | |
dc.creator | Vojislavljević, Dubravka Z. | |
dc.creator | Zarić, Snežana | |
dc.creator | Stamenić, Ljubišav | |
dc.date.accessioned | 2023-04-21T11:07:28Z | |
dc.date.available | 2023-04-21T11:07:28Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 0254-0584 | |
dc.identifier.uri | https://ritnms.itnms.ac.rs/handle/123456789/215 | |
dc.description.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. | en |
dc.publisher | Elsevier Science Sa, Lausanne | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172018/RS// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34013/RS// | |
dc.rights | restrictedAccess | |
dc.source | Materials Chemistry and Physics | |
dc.subject | Desorption | en |
dc.subject | Composite materials | en |
dc.subject | Chemical techniques | en |
dc.subject | Adsorption | en |
dc.title | Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 220 | |
dc.citation.issue | 1 | |
dc.citation.other | 137(1): 213-220 | |
dc.citation.rank | M21 | |
dc.citation.spage | 213 | |
dc.citation.volume | 137 | |
dc.identifier.doi | 10.1016/j.matchemphys.2012.09.010 | |
dc.identifier.rcub | conv_640 | |
dc.identifier.scopus | 2-s2.0-84868213443 | |
dc.identifier.wos | 000312624100033 | |
dc.type.version | publishedVersion | |