Gelişmiş Arama

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dc.contributor.authorDikmen, Sedef
dc.contributor.authorGünay, Ahmet
dc.contributor.authorErsoy, Bahri
dc.contributor.authorErol, İbrahim
dc.date.accessioned2019-10-20T09:03:35Z
dc.date.available2019-10-20T09:03:35Z
dc.date.issued2015
dc.identifier.issn1582-9596
dc.identifier.issn1843-3707
dc.identifier.urihttps://dx.doi.org/10.30638/eemj.2015.121
dc.identifier.urihttps://hdl.handle.net/11421/16751
dc.descriptionWOS: 000355847800015en_US
dc.description.abstractThe aim of this study is to evaluate adsorption kinetics, isotherms and thermodynamic parameters of anionic textile dye (Acid Red 88) onto montmorillonitic clay from aqueous solutions. The parameters of pH, initial dye concentrations, temperature, and the adsorbent dosage were investigated experimentally. Four kinetic models including pseudo-second order, pseudo-nth order, Bangham's equation and double exponential equation (DEE) were selected to follow the adsorption process. The dynamic data were fitted the DEE well and also followed the pseudo-nth order model. The adsorption data obtained were well described by the Langmuir isotherm model. The maximum adsorption capacity was found to be 588 mg/g at 20 degrees C. Thermodynamic parameters such as activation energy (E-a), Gibbs free energy (Delta G(0)), enthalpy (Delta H-0) and entropy (Delta S-0) were also evaluated. The negative value of change in Gibbs free energy indicates that adsorption of AR88 on montmorillonitic clay is spontaneous. The anionic dye molecules can be adsorbed on montmorillonitic clay particles, even when their surface charge (or zeta potential) is negative. Interactions leading to adsorption of anionic dyes (AR88) onto the clay may cause from the following mechanisms: hydrogen bonding, electrostatic interaction, hydrophobic interaction, anion exchange and dye-dye interactions. The results show that montmorillonitic clay could be employed as low-cost material for the removal of acid dyes from textile effluents.en_US
dc.description.sponsorshipThe Scientific and Technological Research Council of Turkey (TUBITAK) [109Y163]en_US
dc.description.sponsorshipThe authors would like to thank "The Scientific and Technological Research Council of Turkey" (TUBITAK) for financially supporting this research under Contract no. 109Y163.en_US
dc.language.isoengen_US
dc.publisherGh Asachi Technical University Iasien_US
dc.relation.isversionof10.30638/eemj.2015.121en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectAcid Red 88en_US
dc.subjectAdsorptionen_US
dc.subjectIsothermsen_US
dc.subjectMontmorillonitic Clayen_US
dc.subjectThermodynamicsen_US
dc.titleDetermination of Equilibrium, Kinetic and Thermodynamic Parameters of Acid Red 88 Adsorption Onto Montmorillonitic Clayen_US
dc.typearticleen_US
dc.relation.journalEnvironmental Engineering and Management Journalen_US
dc.contributor.departmentAnadolu Üniversitesi, Fen Fakültesi, Fizik Bölümüen_US
dc.identifier.volume14en_US
dc.identifier.issue5en_US
dc.identifier.startpage1097en_US
dc.identifier.endpage1110en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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