Removal of nickel(II) ions by histidine modified chitosan beads

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dc.contributor.authorEser A.
dc.contributor.authorNüket Tirtom V.
dc.contributor.authorAydemir T.
dc.contributor.authorBecerik S.
dc.contributor.authorDinçer A.
dc.date.accessioned2024-07-22T08:19:17Z
dc.date.available2024-07-22T08:19:17Z
dc.date.issued2012
dc.description.abstractIn order to increase the nickel adsorption capacity of raw chitosan beads (CB), they were chemically modified with histidine (HIS-ECH-CB) by using crosslinking agent, epichlorohydrine (ECH). The nature and morphology of the sorbent were characterized using FTIR, TGA and SEM analysis. For optimization of adsorption conditions, sorption experiments were performed by varying contact time, pH, temperature and initial nickel concentration. Based on the adsorption experiment, the HIS-ECH-CB showed the significant adsorption capacity of 55.6mg/g under the optimal adsorption condition. Nickel adsorption isotherms data were fitted to Freundlich isotherm. Thermodynamic parameters namely ΔG°, ΔH° and ΔS° of the Ni(II) adsorption process were calculated. The negative values of Gibbs free energy of adsorption (ΔG°) indicated the spontaneity of the adsorption of Ni(II) ions on the histidine modified chitosan. Desorption of Ni(II) ions from HIS-ECH-CB could be done rapidly by using 0.1M HCl, HNO 3 and EDTA solutions and the beads could be used again to adsorb Ni(II) ions. © 2012 Elsevier B.V..
dc.identifier.DOI-ID10.1016/j.cej.2012.09.020
dc.identifier.issn13858947
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/17610
dc.language.isoEnglish
dc.subjectAdsorption
dc.subjectAmino acids
dc.subjectDesorption
dc.subjectExperiments
dc.subjectIons
dc.subjectKinetic parameters
dc.subjectNickel compounds
dc.subjectOptimization
dc.subjectAdsorption capacities
dc.subjectAdsorption experiment
dc.subjectChemically modified
dc.subjectChitosan beads
dc.subjectContact time
dc.subjectCross linking agents
dc.subjectEpichlorohydrine
dc.subjectFree energy of adsorption
dc.subjectFreundlich isotherm
dc.subjectFTIR
dc.subjectModification
dc.subjectModified chitosan
dc.subjectNegative values
dc.subjectNi adsorptions
dc.subjectNickel adsorption
dc.subjectNickel concentrations
dc.subjectNickel ions
dc.subjectSEM analysis
dc.subjectSorption experiments
dc.subjectThermodynamic parameter
dc.subjectNickel
dc.titleRemoval of nickel(II) ions by histidine modified chitosan beads
dc.typeArticle

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