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Equilibrium and Kinetic Studies of the Adsorption of Zn(Ii) Ions Onto Natural and Activated Kaolinites

dc.authorscopusid 15048326300
dc.authorscopusid 33567524700
dc.contributor.author Kul, Ali Riza
dc.contributor.author Caliskan, Necla
dc.date.accessioned 2025-05-10T17:18:12Z
dc.date.available 2025-05-10T17:18:12Z
dc.date.issued 2009
dc.department T.C. Van Yüzüncü Yıl Üniversitesi en_US
dc.department-temp [Kul, Ali Riza; Caliskan, Necla] Univ Yuzuncu, Dept Chem, Fac Arts & Sci, TR-65080 Yil, Van, Turkey en_US
dc.description.abstract The removal of Zn(II) ions from aqueous solution was studied using natural, thermally-activated and acid-activated kaolinite samples at different temperatures. The linear Langmuir, Freundlich and Dubinin-Radushkevich (D-R) adsorption equations were applied to describe the equilibrium isotherms. The Langmuir constants for natural kaolinite were found to be negative whereas, for the other samples, the isotherm models gave a good fit. In addition, the pseudo-first-order and pseudo-second-order models were used to determine the kinetic data. The experimental data were well fitted by the pseudo-second-order kinetic model. Thermodynamic parameters such as the enthalpy (Delta H-0), Gibbs' free energy (Delta G(0)) and entropy (Delta S-0) were calculated for natural, thermally-activated and acid-activated kaolinite. These values showed that the adsorption of Zn(II) ions onto activated kaolinite was controlled by a physical mechanism and occurred spontaneously The process of adsorption was favoured at high temperatures, with the adsorption capacity of the acid-activated kaolinite being greater relative to that of natural and thermally-activated kaolinite at various temperatures. en_US
dc.description.woscitationindex Science Citation Index Expanded
dc.identifier.doi 10.1260/026361709788921632
dc.identifier.endpage 105 en_US
dc.identifier.issn 0263-6174
dc.identifier.issn 2048-4038
dc.identifier.issue 1 en_US
dc.identifier.scopus 2-s2.0-69249116104
dc.identifier.scopusquality Q2
dc.identifier.startpage 85 en_US
dc.identifier.uri https://doi.org/10.1260/026361709788921632
dc.identifier.uri https://hdl.handle.net/20.500.14720/9607
dc.identifier.volume 27 en_US
dc.identifier.wos WOS:000268685900006
dc.identifier.wosquality Q2
dc.language.iso en en_US
dc.publisher Sage Publications inc en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/openAccess en_US
dc.title Equilibrium and Kinetic Studies of the Adsorption of Zn(Ii) Ions Onto Natural and Activated Kaolinites en_US
dc.type Article en_US

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