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dc.creatorDakovic, Aleksandra
dc.creatorKragovic, Milan
dc.creatorRottinghaus, George E.
dc.creatorLedoux, David R.
dc.creatorButkeraitis, Paula
dc.creatorVojislavljević-Vasilev, Dubravka
dc.creatorZarić, Snežana D.
dc.creatorStamenic, Ljubisav
dc.date.accessioned2018-11-22T00:22:26Z
dc.date.available2018-11-22T00:22:26Z
dc.date.issued2012
dc.identifier.issn0254-0584
dc.identifier.urihttp://cherry.chem.bg.ac.rs/handle/123456789/1564
dc.description.abstractA 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.en
dc.publisherElsevier Science Sa, Lausanne
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172018/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34013/RS//
dc.rightsrestrictedAccess
dc.sourceMaterials Chemistry and Physics
dc.subjectComposite materialsen
dc.subjectAdsorptionen
dc.subjectDesorptionen
dc.subjectChemical techniquesen
dc.titlePreparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbenten
dc.typearticle
dc.rights.licenseARR
dcterms.abstractБуткераитис, Паула; Стамениц, Љубисав; Краговиц, Милан; Војислављевић-Василев, Дубравка; Зарић, Снежана; Роттингхаус, Георге Е.; Ледоуx, Давид Р.; Даковиц, Aлександра;
dc.citation.volume137
dc.citation.issue1
dc.citation.spage213
dc.citation.epage220
dc.identifier.wos000312624100033
dc.identifier.doi10.1016/j.matchemphys.2012.09.010
dc.citation.other137(1): 213-220
dc.citation.rankM21
dc.type.versionpublishedVersionen
dc.identifier.scopus2-s2.0-84868213443
dc.identifier.rcubKon_2395


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