Heavy metal removal from aqueous solution by activated bentonite

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dc.contributor.authorGenel, Yaşar
dc.contributor.authorCeylan, Hasan
dc.contributor.authorSaltabaş, Ömer
dc.date.accessioned2020-11-21T15:53:39Z
dc.date.available2020-11-21T15:53:39Z
dc.date.issued2012en_US
dc.departmentİstanbul Ticaret Üniversitesien_US
dc.description.abstractBentonite was found to have adsorption capacity for Pb(II), Cr(III), Zn(II) and Co(II). Towards this aim, batch adsorption experiments were carried out and the effects of various parameters (solution pH, dose of bentonite loading, contact time, temperature, and initial metal concentration) on this removal process have been investigated. Adsorption was decreased with increasing temperature for all studied metals. The Langmuir and Freundlich adsorption models were used for mathematical description of the adsorption equilibrium. Equilibrium data was fitted to the Langmuir model in the concentrations of 10-100 mg L-1 at 293 and 313 K. Based on the Langmuir isotherm plots, the maximum adsorption capacity value was calculated to be 30.40 mg g -1 for Cr(III), 30.27 mg g-1 for Pb(II), 29.94 mg g -1 for Zn(II), and 29.85 mg g-1 for Co(II), at 293 K. Various thermodynamic parameters, such as ?G0, ?H 0, and ?S0, were evaluated with results indicating that this system was an exothermic spontaneous reaction and kinetically suited to pseudo-second order model. Adsorption ability of bentonite decreased in the order of Cr(III) > Pb(II) > Zn(II) > Co(II), and its adsorption capacity in the order of ZnCl2 activation > NaOH activation > H2SO4 activation > native bentonite. © PSP 2012.en_US
dc.identifier.endpage1818en_US
dc.identifier.issn1018-4619
dc.identifier.issue7en_US
dc.identifier.scopus2-s2.0-84864756072en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage1810en_US
dc.identifier.urihttps://hdl.handle.net/11467/3648
dc.identifier.volume21en_US
dc.identifier.wosWOS:000306887100014en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.relation.ispartofFresenius Environmental Bulletinen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectActivationen_US
dc.subjectAdsorptionen_US
dc.subjectBentoniteen_US
dc.subjectHeavy metalen_US
dc.subjectIsothermen_US
dc.titleHeavy metal removal from aqueous solution by activated bentoniteen_US
dc.typeArticleen_US

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