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 |