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dc.creatorKragovic, Milan
dc.creatorDakovic, Aleksandra
dc.creatorMarković, Marija
dc.creatorKrstić, Jugoslav
dc.creatorGatta, G. Diego
dc.creatorRotiroti, Nicola
dc.date.accessioned2019-01-30T17:34:49Z
dc.date.available2019-01-30T17:34:49Z
dc.date.issued2013
dc.identifier.issn0169-4332
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/1209
dc.description.abstractThe influence of contact time, temperature and particle size on lead sorption by the natural and Fe(III)-modified zeolites was investigated. Characterization of the natural and Fe(III)-modified zeolite before and after lead sorption was performed by determination of textural properties, by scanning electron microscopy and X-ray spectroscopy in energy-dispersive mode (SEM-EDS), transmission electron microscopy (TEM) and X-ray powder diffraction (XRPD) analysis. Lead sorption kinetics at 303-333 K, best represented by the pseudo-second order model and activation energy (13.5 and 8.5 kJ/mol for the natural and Fe(III)-modified zeolite respectively) confirmed an activated chemical sorption. Desorption experiments indicated that lead was irreversibly sorbed on both zeolites. XRPD, TEM and SEM results showed that modification of the natural zeolite with Fe(III) ions did not change its crystal structure and iron is mainly located at the zeolite surface, likely in form of amorphous iron oxy-hydroxides. Specific surface area significantly increases after modification of the natural zeolite with Fe(III) ions (from 30.2 for the natural to 52.5 m(2)/g for Fe(III)-modified zeolite). Characterization of both lead saturated sorbents suggested that besides ion exchange, lead is both chemisorbed and precipitated at their surfaces, and presence of amorphous iron in Fe(III)-modified zeolite favors sorption of lead.en
dc.publisherElsevier Science Bv, Amsterdam
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.sourceApplied Surface Science
dc.subjectSorptionen
dc.subjectDesorptionen
dc.subjectLeaden
dc.subjectNatural zeoliteen
dc.subjectFe(III)-modified zeoliteen
dc.titleCharacterization of lead sorption by the natural and Fe(III)-modified zeoliteen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractКраговиц, Милан; Даковиц, Aлександра; Марковиц, Марија; Ротироти, Ницола; Гатта, Г. Диего; Крстић, Југослав;
dc.citation.volume283
dc.citation.spage764
dc.citation.epage774
dc.citation.other283: 764-774
dc.citation.rankM21
dc.identifier.doi10.1016/j.apsusc.2013.07.016
dc.identifier.rcubConv_3024
dc.identifier.scopus2-s2.0-84883192577
dc.identifier.wos000323601700109
dc.type.versionpublishedVersion


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