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Water Science & Technology Vol 66 No 3 pp 564–572 © IWA Publishing 2012 doi:10.2166/wst.2012.210 Removal of copper(II) and cadmium(II) ions from aqueous solutions by biosorption onto pine coneGörkem Değirmen, Murat Kılıç, Özge Çepelioğullar and Ayşe E. PütünDepartment of Chemical Engineering, Anadolu University, 26480 Eskişehir, Turkey E-mail: aeputun@anadolu.edu.trABSTRACT In this study, the removal of copper(II) and cadmium(II) ions from aqueous solutions by biosorption onto pine cone was studied. Variables that affect the biosorption process such as pH, biosorbent dosage, initial metal ion concentration, contact time and temperature of solution were optimized. Experimental data were fitted to Langmuir, Freundlich, Dubinin Radushkevich and Temkin isotherm models to investigate the equilibrium isotherms. Pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models were used to determine the biosorption mechanism. The thermodynamics of biosorption were studied for predicting the nature of biosorption. Experimental results showed that pine cone could be evaluated as an alternative precursor for removal of heavy metal ions from aqueous solutions, due to its high biosorption capacity, availability, and low cost. Keywords: biomass; biosorption; heavy metal; pine cone eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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