Utilization of walnut shells (Juglans regia) as an adsorbent for the removal of acid dyes

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dc.contributor.authorAydin, Haluk
dc.contributor.authorBaysal, Guelay
dc.contributor.authorBulut, Yasemin
dc.date.accessioned2024-04-24T17:40:01Z
dc.date.available2024-04-24T17:40:01Z
dc.date.issued2009
dc.departmentDicle Üniversitesien_US
dc.description.abstractThe removal of acid red 183 and acid green 25 onto walnut shells (Juglans regia) (WS) from aqueous solutions was investigated by using parameters such as contact time, temperature, pH, adsorbent doses and initial dye concentration. Adsorption equilibrium was reached within 30 min. The adsorption isotherms were described by means of the Langmuir and Freundlich isotherms. It was found that the Langmuir isotherm appears to fit the isotherm data better than the Freundlich isotherm. The maximum adsorption capacities for acid red 183 and acid green 25 on WS at 308,313, and 318 K were found to be 45,37, and 37; 21,14, and 7 mg g(-1), respectively. The data obtained from adsorption isotherms at different temperatures were used to calculate some thermodynamic quantities Such as free energy of adsorption (Delta G(0)), enthalpy (Delta H(0)), and entropy (Delta S(0)). That G(0) is negative, indicating that the nature of adsorption process for dyes is spontaneous. The positive value of H(0) indicates that the adsorption of dyes onto WS is an endothermic process. The positive value of S(0) reflects the affinity of the adsorbent for dyes. The kinetics and the factors controlling the adsorption process were also studied. The adsorption process followed a second-order model. WS, being a cheap, and easily available material, can be an alternative for more costly adsorbents used for dye removal in wastewater treatment processes.en_US
dc.identifier.endpage147en_US
dc.identifier.issn1944-3994
dc.identifier.issue1-3en_US
dc.identifier.scopus2-s2.0-76849114918
dc.identifier.scopusqualityQ3
dc.identifier.startpage139en_US
dc.identifier.urihttps://hdl.handle.net/11468/21525
dc.identifier.volume2en_US
dc.identifier.wosWOS:000266712200022
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherDesalination Publen_US
dc.relation.ispartofDesalination and Water Treatment
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAdsorptionen_US
dc.subjectAdsorption Isothermsen_US
dc.subjectAdsorption Of Dyesen_US
dc.subjectWalnut Shellsen_US
dc.subjectAcid Dyesen_US
dc.titleUtilization of walnut shells (Juglans regia) as an adsorbent for the removal of acid dyesen_US
dc.titleUtilization of walnut shells (Juglans regia) as an adsorbent for the removal of acid dyes
dc.typeArticleen_US

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