Biosorption of Pb(II) from aqueous solution by Solanum melongena leaf powder as a low-cost biosorbent prepared from agricultural waste

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• 作者：Gutha Yuvaraja ; Nettem Krishnaiah ; Munagapati Venkata Subbaiah ; Abburi Krishnaiah
• 关键词：Solanum melongena leaf powder ; Biosorption ; Lead
• 刊名：Colloids and Surfaces B: Biointerfaces
• 出版年：1 February, 2014
• 年：2014
• 卷：114
• 期：Complete
• 页码：75-81
• 全文大小：1283 K

文摘

Solanum melongena leaves are relatively galore and used as inexpensive material. This paper presents the characterization and evaluation of potential of S. melongena leaf powder (SMLP) for removal of Pb(II) from aqueous solution as a function of pH, biomass dosage, initial metal ion concentration, contact time and temperature. Experimental data were analyzed in terms of three kinetic models such as the pseudo-first-order, pseudo-second-order and intraparticle diffusion models and the results showed that the biosorption processes of Pb(II) followed well pseudo-second-order kinetics. Langmuir and Freundlich isotherm models were applied to describe the biosorption process. Langmuir isotherm described the equilibrium data very well, with a maximum monolayer sorption capacity of 71.42 mg/g for Pb(II) ions at 323 K. The biosorption process was spontaneous and endothermic in nature with negative 螖G掳 (鈭?.746, 鈭?.509 and 鈭?.983 kJ/mol) and positive value for 螖H掳 (3.698 kJ/mol).