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dc.creatorDakovic, A
dc.creatorTomasevic-Canovic, M
dc.creatorDondur, V
dc.creatorRottinghaus, GE
dc.creatorMedaković, Vesna
dc.creatorZarić, Snežana
dc.date.accessioned2018-11-22T00:08:56Z
dc.date.available2018-11-22T00:08:56Z
dc.date.issued2005
dc.identifier.issn0927-7765
dc.identifier.urihttp://cherry.chem.bg.ac.rs/handle/123456789/741
dc.description.abstractAdsorption of zearalenone (ZEN), ochratoxin A (OCHRA) and aflatoxin B1 (AFB1) on natural zeolite, clinoptilolite, modified with different amounts of octadecyldimethylbenzyl ammonium (ODMBA) ions was investigated. Results showed that adsorption of hydrophobic ionizable ZEN on unmodified zeolite tuff was very low and that adsorption on organozeolites increased with increasing hydrophobicity of the zeolitic surface. The adsorption was independent of the form of ZEN in solution and the solution pH, indicating that hydrophobic interactions with ODMBA are responsible for ZEN adsorption. Adsorption of low polar ionizable OCHRA on organozeolites also increased with increasing hydrophobicity of the zeolitic surface, however, OCHRA showed moderate adsorption on unmodified zeolitic tuff at pH 3. OCHRA adsorption on unmodified zeolite as well as on lower surface coverage of organozeolite was dependent on the form of OCHRA in solution; there was a decrease of adsorption at high pH, where OCHRA is in the anionic form. It indicated that at acidic pH, low surface coverage allows some combination of hydrophobic interaction with ODMBA and interactions with the surface of the zeolite. At higher surface coverage, the OCHRA adsorption was higher and practically independent of pH, indicating that the hydrophobic interactions of OCHRA with ODMBA are responsible for its adsorption. Nonionizable low polar AFB1 had a high affinity for the unmodified zeolitic tuff and the adsorption of AFB1 was greatly reduced for organozeolites, indicating that AFB1 does not have high tendency for hydrophobic interactions with ODMBA. pH dependence of AFB1 adsorption, while AFB1 has the same form at all pHs, demonstrated that the surface modification of the zeolite depends on pH and that these modifications have influence on its adsorption. The calculated dipole moments of neutral mycotoxin molecules: AFB1-9.5D, OCHRA-6.9D and ZEN-2.2D are in qualitative agreement with adsorption experimental data. (c) 2005 Elsevier B.V All rights reserved.en
dc.publisherElsevier Science Bv, Amsterdam
dc.rightsrestrictedAccess
dc.sourceColloids and Surfaces. B: Biointerfaces
dc.subjectmycotoxinsen
dc.subjectzeolitesen
dc.subjectorganozeolitesen
dc.subjectcation-pien
dc.subjectdipole momentsen
dc.titleAdsorption of mycotoxins by organozeolitesen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractМедаковић, Весна; Роттингхаус, ГЕ; Зарић, Снежана; Дондур, В; Томасевиц-Цановиц, М; Даковиц, A;
dc.citation.volume46
dc.citation.issue1
dc.citation.spage20
dc.citation.epage25
dc.identifier.wos000233501400003
dc.identifier.doi10.1016/j.colsurfb.2005.08.013
dc.citation.other46(1): 20-25
dc.citation.rankM22
dc.identifier.pmid16198090
dc.type.versionpublishedVersionen
dc.identifier.scopus2-s2.0-27644560477
dc.identifier.rcubKon_1694


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