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dc.creatorJovanović, Mina
dc.creatorRajić, Nevenka
dc.creatorObradović, Bojana
dc.date.accessioned2021-03-10T11:49:26Z
dc.date.available2021-03-10T11:49:26Z
dc.date.issued2012
dc.identifier.issn0304-3894
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/2114
dc.description.abstractRemoval of heavy metal ions from aqueous solutions using zeolites is widely described by pseudo-second order kinetics although this model may not be valid under all conditions. In this work, we have extended approaches used for derivation of this model in order to develop a novel kinetic model that is related to the ion exchange mechanism underlying sorption of metal ions in zeolites. The novel model assumed two reversible steps. i.e. release of sodium ions from the zeolite lattice followed by bonding of the metal ion. The model was applied to experimental results of Cu(II) sorption by natural clinoptilolite-rich zeolitic tuff at different initial concentrations and temperatures and then validated by predictions of ion exchange kinetics of other divalent heavy metal ions (i.e. Mn(II), Zn(II) and Pb(II)). Model predictions were in excellent agreements with experimental data for all investigated systems. In regard to the proposed mechanism, modeling results implied that the sodium ion release rate was constant for all investigated metals while the overall rate was mainly determined by the rate of heavy metal ion bonding to the lattice. In addition, prediction capabilities of the novel model were demonstrated requiring one experimentally determined parameter, only.en
dc.publisherElsevier, Amsterdam
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172018/RS//
dc.rightsrestrictedAccess
dc.sourceJournal of Hazardous Materials
dc.subjectKinetic modelen
dc.subjectSorption mechanismen
dc.subjectIon-exchangeen
dc.subjectNatural zeoliteen
dc.subjectHeavy metalsen
dc.titleNovel kinetic model of the removal of divalent heavy metal ions from aqueous solutions by natural clinoptiloliteen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage64
dc.citation.other233: 57-64
dc.citation.rankaM21
dc.citation.spage57
dc.citation.volume233
dc.identifier.doi10.1016/j.jhazmat.2012.06.052
dc.identifier.pmid22818175
dc.identifier.scopus2-s2.0-84864744972
dc.identifier.wos000308277800008
dc.type.versionpublishedVersion


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