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dc.creatorHabish, Amal Juma
dc.creatorLazarević, Slavica
dc.creatorJanković-Častvan, Ivona
dc.creatorJokić, Bojan
dc.creatorKovač, Janez
dc.creatorRogan, Jelena
dc.creatorJanaćković, Đorđe
dc.creatorPetrović, Rada
dc.date.accessioned2021-03-10T13:29:52Z
dc.date.available2021-03-10T13:29:52Z
dc.date.issued2017
dc.identifier.issn0944-1344
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/3676
dc.description.abstractNatural (SEP) and partially acid-activated (AAS) sepiolites were used to prepare composites with nanoscale zerovalent iron (nZVI) at different (SEP or AAS)/nZVI ratios in order to achieve the best nZVI dispersibility and the highest adsorption capacity for Cd2+. Despite the higher surface area and pore volume of AAS, better nZVI dispersibility was achieved by using SEP as the support. On the other hand, a lower oxidation degree was achieved during the synthesis using AAS. X-ray photoelectron spectroscopy (XPS) analysis of the composite with the best nZVI dispersibility, before and after Cd2+ adsorption, confirmed that the surface of the nZVI was composed of oxidized iron species. Metallic iron was not present on the surface, but it was detected in the subsurface region after sputtering. The content of zerovalent iron decreased after Cd2+ adsorption as a result of iron oxidation during Cd2+ adsorption. The XPS depth profile showed that cadmium was present not only at the surface of the composite but also in the subsurface region. The adsorption isotherms for Cd2+ confirmed that the presence of SEP and AAS decreased the agglomeration of the nZVI particles in comparison to the pure nZVI, which provided a higher adsorption capacity. The results showed that the prevention of both aggregation and oxidation during the synthesis was necessary for obtaining an SEP/AAS-nZVI composite with a high adsorption capacity, but oxidation during adsorption was beneficial for Cd2+ removal. The formation of strong bonds between Cd2+ and the adsorbents sites of different energy until monolayer formation was proposed according to modeling of the adsorption isotherms.en
dc.publisherSpringer Heidelberg, Heidelberg
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS//
dc.rightsrestrictedAccess
dc.sourceEnvironmental Science and Pollution Research
dc.subjectNanoscale zerovalent iron (nZVI)en
dc.subjectNatural and acid-activated sepiolitesen
dc.subjectDispersibilityen
dc.subjectCd2+ adsorptionen
dc.subjectXPS depth profileen
dc.titleNanoscale zerovalent iron (nZVI) supported by natural and acid-activated sepiolites: the effect of the nZVI/support ratio on the composite properties and Cd2+ adsorptionen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage643
dc.citation.issue1
dc.citation.other24(1): 628-643
dc.citation.rankM22
dc.citation.spage628
dc.citation.volume24
dc.identifier.doi10.1007/s11356-016-7802-y
dc.identifier.pmid27743328
dc.identifier.scopus2-s2.0-84991059287
dc.identifier.wos000392105700060
dc.type.versionpublishedVersion


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Приказ основних података о документу