Adsorption of dyes on Sahara desert sand

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dc.contributor.authorVarlikli, Canan
dc.contributor.authorBekiari, Vlasoula
dc.contributor.authorKus, Mahmut
dc.contributor.authorBoduroglu, Numan
dc.contributor.authorOner, Ilker
dc.contributor.authorLianos, Panagiotis
dc.contributor.authorLyberatos, Gerasimos
dc.date.accessioned2020-03-26T17:37:49Z
dc.date.available2020-03-26T17:37:49Z
dc.date.issued2009
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractSahara desert sand (SaDeS) was employed as a mineral sorbent for retaining organic dyes from aqueous solutions. Natural sand has demonstrated a strong affinity for organic dyes but significantly lost its adsorption capacity when it was washed with water. Therefore, characterization of both natural and water washed sand was performed by XRD, BET, SEM and FTIR techniques. It was found that water-soluble kyanite, which is detected in natural sand, is the dominant factor affecting adsorbance of cationic dyes. The sand adsorbs over 75% of cationic dyes but less than 21% for anionic ones. Among the dyes studied, Methylene Blue (MB) demonstrated the strongest affinity for Sahara desert sand (Q(e) = 11.98 mg/g, for initial dye solution concentration 3.5 x 10(-5) mol/L). The effects of initial dye concentration, the amount of the adsorbent, the temperature and the pH of the solution on adsorption capacity were tested by using Methylene Blue as model dye. Pseudo-first-order, pseudo-second-order and intraparticle diffusion models were applied. It was concluded that adsorption of Methylene Blue on Sahara desert sand followed pseudo-second order kinetics. Gibbs free energy, enthalpy change and entropy change were calculated and found -6411 J/mol, -30360 J/mol and -76.58 J/mol K, respectively. These values indicate that the adsorption is an exothermic process and has a spontaneous nature at low temperatures. (C) 2009 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipGR-TR Bilateral R&T Cooperation programen_US
dc.description.sponsorshipWe are thankful to Prof Dr. Cemal Saydam for kindly providing the SaDeS and Prof. Dr. Serclar Ozcelik for the SEM images. Financial aid from the GR-TR Bilateral R&T Cooperation program is graciously acknowledged.en_US
dc.identifier.doi10.1016/j.jhazmat.2009.05.030en_US
dc.identifier.endpage34en_US
dc.identifier.issn0304-3894en_US
dc.identifier.issue1en_US
dc.identifier.pmid19515485en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage27en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.jhazmat.2009.05.030
dc.identifier.urihttps://hdl.handle.net/20.500.12395/23256
dc.identifier.volume170en_US
dc.identifier.wosWOS:000269162000005en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.ispartofJOURNAL OF HAZARDOUS MATERIALSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectSahara desert sanden_US
dc.subjectAdsorptionen_US
dc.subjectDyesen_US
dc.subjectWater treatmenten_US
dc.titleAdsorption of dyes on Sahara desert sanden_US
dc.typeArticleen_US

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