Sorption behavior of Cu(II) ions on insolubilized humic acid under acidic conditions: An application of Scatchard plot analysis in evaluating the pH dependence of specific and nonspecific bindings

dc.contributor.authorGezici, Orhan
dc.contributor.authorKara, Huseyin
dc.contributor.authorAyar, Ahmet
dc.contributor.authorTopkafa, Mustafa
dc.date.accessioned2020-03-26T17:18:14Z
dc.date.available2020-03-26T17:18:14Z
dc.date.issued2007
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractSorption behavior of Cu(II) ions on a humic acid-based solid phase, insolubilized humic acid (IHA), were investigated under continuous column conditions. The quantitative data were derived on the basis of breakthrough curves obtained at different experimental conditions. For the studied experimental conditions, the highest and lowest observable capacities of IHA toward Cu(II) were found as 48.34 and 0.84 mu mol g(-1), respectively. In order to evaluate the pH dependence of Cu(II) binding on IHA, the effect of influent concentration was investigated at three different pH values (1.0, 2.0 and 3.0), and adsorption isotherms were derived for each acidic condition. The characteristics of Cu(II) bindings were evaluated by using Scatchard plot analysis, and it was observed that under strongly acidic condition, pH 1.0, nonspecific and/or multi-type interactions between Cu(II) and MA were the prevailing effects causing the Cu(II) sorption. On the other hand, at pH 2.0 and 3.0, the role of specific interactions was more clearly observed, and so at pH(s) 2.0 and 3.0, the binding of Cu(II) on IHA was mainly attributed to specific interactions rather than nonspecific ones. For pH 2.0 and 3.0, the binding types of Cu(II) on IHA were sub-classified according to different affinities observed between Cu(II) and IHA, and thus two main types of specific bindings were proposed for the studied influent concentration range (1.0 x 10(-3) to 1.0 X 10(-1) mol l(-1)): Type-1, high-affinity/low capacity and Type-2, low-affinity/high capacity bindings. Finally, probable benefit of each specific binding type in separation of Cu(II) from acidic aqueous media has been discussed in detail. (c) 2006 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.seppur.2006.11.012en_US
dc.identifier.endpage139en_US
dc.identifier.issn1383-5866en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage132en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.seppur.2006.11.012
dc.identifier.urihttps://hdl.handle.net/20.500.12395/21616
dc.identifier.volume55en_US
dc.identifier.wosWOS:000246131500019en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.ispartofSEPARATION AND PURIFICATION TECHNOLOGYen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectadsorptionen_US
dc.subjectbreakthrough curveen_US
dc.subjectcopperen_US
dc.subjectheavy metalen_US
dc.subjecthumic aciden_US
dc.subjectinsolubilizationen_US
dc.subjectscatcharden_US
dc.subjectSPEen_US
dc.titleSorption behavior of Cu(II) ions on insolubilized humic acid under acidic conditions: An application of Scatchard plot analysis in evaluating the pH dependence of specific and nonspecific bindingsen_US
dc.typeArticleen_US

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