Anionic dye removal from aqueous solutions using modified zeolite: Adsorption kinetics and isotherm studies

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dc.contributor.authorAlver, Erol
dc.contributor.authorMetin, Aysegül Ülkü
dc.date.accessioned2020-06-25T17:52:46Z
dc.date.available2020-06-25T17:52:46Z
dc.date.issued2012
dc.departmentKırıkkale Üniversitesi
dc.description.abstractThe natural zeolite was modified with hexamethylenediamine (HMDA) and used as adsorbent to remove anionic dyes, namely Reactive Red 239 (RR-239) and Reactive Blue 250 (RB-250). And, the adsorption equilibrium and kinetic studies of anionic dyes were carried out. In presented work, the origin of the zeolite (Heulandite) used was in Turkey. The adsorption of reactive dyes on modified zeolite (HMDA-Z) was investigated by batch adsorption experiments. The effects of pH, temperature, sorbent dosage and the initial dyes concentrations were investigated. While the increase in temperature resulted in a higher RB-250 loading per unit weight of the modified zeolite, adsorption capacity of modified zeolite did not constitute a noticeable change for RR-239. As an additional factor effecting the removal of reactive dyes, the effects of competitive ions such as nitrate, sulfate and chloride were investigated. The adsorption results indicate that the natural zeolite had a limited adsorption capacity for reactive dyes but is substantially improved upon modifying its surfaces with HMDA. The isotherm data of both investigated dyes were analyzed by the Langmuir, Freundlich, and Redlich-Peterson isotherm model according to temperature. The most appropriate model for the equilibrium process of both dyes was the Freundlich model. The kinetic studies indicated that the adsorption of reactive dyes followed the pseudo-second-order kinetic. Thermodynamic calculations showed that the adsorption of both investigated dyes was a spontaneous and endothermic process for RB-250 and an exothermic process for RR-239. (C) 2012 Elsevier B.V. All rights reserved.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.cej.2012.06.038
dc.identifier.endpage67en_US
dc.identifier.issn1385-8947
dc.identifier.issn1873-3212
dc.identifier.scopus2-s2.0-84865541677
dc.identifier.scopusqualityQ1
dc.identifier.startpage59en_US
dc.identifier.urihttps://doi.org/10.1016/j.cej.2012.06.038
dc.identifier.urihttps://hdl.handle.net/20.500.12587/5223
dc.identifier.volume200en_US
dc.identifier.wosWOS:000309615800008
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Saen_US
dc.relation.ispartofChemical Engineering Journal
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectZeoliteen_US
dc.subjectModificationen_US
dc.subjectAnionic dyeen_US
dc.subjectIsothermen_US
dc.subjectKineticen_US
dc.titleAnionic dye removal from aqueous solutions using modified zeolite: Adsorption kinetics and isotherm studiesen_US
dc.typeArticle

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