A chitosan-based composite for adsorption of uranyl ions; mechanism, isothems, kinetics and thermodynamics

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dc.contributor.authorSenol, Zeynep Mine
dc.date.accessioned2024-10-26T18:02:42Z
dc.date.available2024-10-26T18:02:42Z
dc.date.issued2021
dc.departmentSivas Cumhuriyet Üniversitesi
dc.description.abstractThe present paper describes a green and cost-effective approach to investigate chitosan-sepiolite (Ch-Sep) composite as an adsorbent for removal of UO22+ ions in aqueous solution. The Ch-Sep composite was prepared as a beads using with two cross-linking agents: tripolyphosphate (TPP) and epichlorohydrin (ECH). Their adsorption properties for the removal of UO(2)(2+ )ions in aqueous solution by batch experimental conditions were studied. The adsorptive removal processes of UO(2)(2+ )ions from aqueous solution were evaluated by Langmuir, Freundlich and Dubinin-Radushkevich isotherm models, and was found to be perfectly fit to the Langmuir model (R-2 = 0.971). The maximum adsorption capacity was 0220 mol kg(-1) at 25 degrees C from Langmuir isotherm model. Adsorption energy was 12.1 kJ mol(-1) indicating that the adsorption process was chemical. The adsorption kinetics followed the pseudo second order and infra particle diffusion models. The thermodynamics parameters of UO22+ ions removal from aqueous solution was confirmed spontaneous, endothermic and possible at higher temperatures behavior of adsorption process. The adsorption mechanism of UO(2)(2+ )ions onto Ch-Sep composite beads was investigated by FT-IR and SEM analysis. These findings revealed the effectiveness and potential of the newly synthesized Ch-Sep composite beads for the removal of UO22+ ions. (C) 2021 Elsevier B.V. All rights reserved.
dc.description.sponsorshipCumhuriyet University Scientific Research Projects Commission
dc.description.sponsorshipThe present study was partly supported by the Cumhuriyet University Scientific Research Projects Commission. The author strongly declares that no scientific and/or financial conflicts of interest, exists with other people or institutions.
dc.identifier.doi10.1016/j.ijbiomac.2021.05.130
dc.identifier.endpage1648
dc.identifier.issn0141-8130
dc.identifier.issn1879-0003
dc.identifier.pmid34044032
dc.identifier.scopus2-s2.0-85106932819
dc.identifier.scopusqualityQ1
dc.identifier.startpage1640
dc.identifier.urihttps://doi.org/10.1016/j.ijbiomac.2021.05.130
dc.identifier.urihttps://hdl.handle.net/20.500.12418/28290
dc.identifier.volume183
dc.identifier.wosWOS:000675833200004
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofInternational Journal of Biological Macromolecules
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectChitosan
dc.subjectSepiolite
dc.subjectCrosslinking agent
dc.subjectComposite beads
dc.subjectAdsorption mechanism
dc.subjectUO22+
dc.titleA chitosan-based composite for adsorption of uranyl ions; mechanism, isothems, kinetics and thermodynamics
dc.typeArticle

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