Removal of aniline from aqueous solution by activated kaolinite: Kinetic, equilibrium and thermodynamic studies

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dc.authorid0000-0002-6756-4973en_US
dc.contributor.authorKoyuncu, Hülya
dc.contributor.authorKul, Ali Riza
dc.date.accessioned2021-03-20T20:12:37Z
dc.date.available2021-03-20T20:12:37Z
dc.date.issued2019
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Kimya Mühendisliği Bölümüen_US
dc.description.abstractIn this study, the adsorption kinetics, equilibrium and thermodynamics of aniline on native (NK) and acid activated (AK) kaolinites were examined. It was shown that modification of kaolinite with acid not only increases the adsorption capacity of the adsorbent from 109.89 to 256.41 mgg(-1) for aniline but also its initial sorption rate for aniline, suggesting the activated kaolinite with higher adsorption capacity have great potential application in removal of aniline from water and wastewater. Adsorption efficiency for AK reached at about 91% while it was at about 75% for NK. The kinetics of adsorption of aniline was discussed using three kinetic models, the pseudofirst-order, the pseudo-second-order and the infra-particle diffusion model. The experimental data fitted very well the pseudo-second-order kinetic model due to the higher correlation coefficient and lower sum of squared errors (SSE,%) values, and a good agreement between the experimental and the calculated qe values. Experimental results were also analysed by the Langmuir, Freundlich and Dubinin-Redushkevich (D-R) isotherm models. R-L separation factor for Langmuir and the n value for Freundlich isotherm show that aniline are favourably adsorbed by NK and AK. The negative value of Delta G and positive value of Delta S showed that the adsorption of aniline onto NK and AK was feasible and spontaneous. The positive value of Delta H confirmed the endothermic nature of adsorption.en_US
dc.identifier.doi10.1016/j.colsurfa.2019.02.057en_US
dc.identifier.endpage66en_US
dc.identifier.issn0927-7757
dc.identifier.issn1873-4359
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage59en_US
dc.identifier.urihttp://doi.org/10.1016/j.colsurfa.2019.02.057
dc.identifier.urihttps://hdl.handle.net/20.500.12885/639
dc.identifier.volume569en_US
dc.identifier.wosWOS:000461689800008en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKoyuncu, Hülya
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofColloids And Surfaces A-Physicochemical And Engineering Aspectsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAnilineen_US
dc.subjectKaoliniteen_US
dc.subjectAdsorptionen_US
dc.subjectKineticsen_US
dc.subjectEquilibriumen_US
dc.titleRemoval of aniline from aqueous solution by activated kaolinite: Kinetic, equilibrium and thermodynamic studiesen_US
dc.typeArticleen_US

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