Comparative biosorption of Mn(II) and Pb(II) ions on raw and oxalic acid modified maize husk: Kinetic, thermodynamic and isothermal studies

被引：45
作者：
Adeogun A.I. [1 ]
Idowu M.A. [1 ]
Ofudje A.E. [2 ]
Kareem S.O. [3 ]
Ahmed S.A. [1 ]
机构：
[1] Department of Chemistry, Federal University of Agriculture, Abeokuta
[2] Department of Science Laboratory Technology, Adegbenro ICT Polytechnic, Sapade
[3] Department of Microbiology, Federal University of Agriculture, Abeokuta
来源：
Applied Water Science | 2013年 / 3卷 / 1期
关键词：
Biosorption; Isotherms; Kinetics; Maize husk; Oxalic acid;
D O I：
10.1007/s13201-012-0070-1
中图分类号：
学科分类号：
摘要：
Maize husk, an abundant agricultural waste was used to prepare a biosorbent for the biosorption of Mn(II) and Pb(II) ions from aqueous solution in a batch process. Equilibrium and kinetics of biosorption of the metals ions were studied at 25 °C. The adsorbtion data were treated with common kinetic and isotherm models. The equilibrium data fitted well with Langmuir isotherm with maximum capacity of 8. 52 and 7. 38 mg g-1 for Mn(II) and Pb(II), respectively on raw biomass (UTCS). The capacity of 9. 00 and 9. 33 mg g-1 was observed for Mn(II) and Pb(II), respectively on acid modified biomass (ATCS). The study also revealed that the sorption process in both cases depend on biomass dosage, temperature, pH and initial metal ion concentration, respectively. The calculated thermodynamic parameters (ΔGo, ΔHo and ΔSo) showed that the biosorption of the metal ions onto maize husk is feasible, spontaneous and exothermic in nature. © 2012 The Author(s).
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页码：167 / 179
页数：12
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