Biosorption potential of the waste biomaterial obtained from Cucumis melo for the removal of Pb²⁺ ions from aqueous media: Equilibrium, kinetic, thermodynamic and mechanism analysis

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• 作者：Sibel Tunali Akar^a ; ^{stunali@ogu.edu.tr} ; Sercan Arslan^b ; Tugba Alp^b ; Derya Arslan^b ; Tamer Akar^a
• 关键词：Biosorption ; Isotherm ; Kinetic ; Pb2+ ; Mechanism ; Thermodynamic
• 刊名：Chemical Engineering Journal
• 出版年：2012
• 期刊代码：16_13858947
• 类别：ce
• 出版时间：15 March, 2012
• 卷：185-186
• 期：Complete
• 页码：82-90
• 文件大小：1059 K

摘要

The potential use of a waste biosorbent material obtained from Cucumis melo (C. melo) for the removal of Pb²⁺ ions from aqueous solutions was investigated by considering equilibrium and kinetic aspects. The biosorption showed a pH dependent profile. An increase in biosorbent dosage up to 1.8 g L^鈭? caused an increase in the biosorption yield of the biosorbent. The relatively fast biosorption at all studied temperatures follows the pseudo-second-order kinetic model. Biosorption isotherm modeling shows the equilibrium data fitted to the Langmuir model with a maximum monolayer biosorption capacity of 3.64 脳 10^鈭? mol g^鈭?. The thermodynamic parameters indicated the biosorption of Pb²⁺ on the biomass was a spontaneous and endothermic process. Experiments conducted with multi-metal system demonstrated that the presence of co-ions slightly reduced the Pb²⁺ biosorption capacity of the biomass. The possible Pb²⁺ ion-biomaterial interactions were evaluated by the zeta potential, FTIR, SEM and EDX analysis. Results of this work showed the suggested biosorbent could be an effective and eco-friendly alternative for the removal of Pb²⁺ ions from contaminated solutions.