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Batch and fixed-bed column studies for biosorption of Zn(II) ions onto pongamia oil cake (Pongamia pinnata) from biodiesel oil extraction

被引：27
|
作者：
Shanmugaprakash, M. [1 ]
Sivakumar, V. [2 ]
机构：
[1] Kumaraguru Coll Technol, Dept Biotechnol, Downstream Proc Lab, Coimbatore 641049, Tamil Nadu, India
[2] Anna Univ, Dept Chem Engn, AC Tech, Madras 600025, Tamil Nadu, India
来源：
JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2015年 / 164卷
关键词：
Breakthrough curve; Kinetics; Isotherm; Pongamia oil cake; Regeneration; Zn(II) biosorption; BINARY-METAL SYSTEMS; AQUEOUS-SOLUTION; COMPETITIVE BIOSORPTION; ADSORPTION; REMOVAL; SINGLE; ZINC; CHROMIUM(VI); OPTIMIZATION; EQUILIBRIUM;
D O I：
10.1016/j.jenvman.2015.08.034
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The present work, analyzes the potential of defatted pongamia oil cake (DPOC) for the biosorption of Zn(II) ions from aqueous solutions in the both batch and column mode. Batch experiments were conducted to evaluate the optimal pH, effect of adsorbent dosage, initial Zn(II) ions concentration and contact time. The biosorption equilibrium and kinetics data for Zn(II) ions onto the DPOC were studied in detail, using several models, among all it was found to be that, Freundlich and the second-order model explained the equilibrium data well. The calculated thermodynamic parameters had shown that the biosorption of Zn(II) ions was exothermic and spontaneous in nature. Batch desorption studies showed that the maximum Zn(II) recovery occurred, using 0.1 M EDTA. The Bed Depth Service Time (BDST) and the Thomas model was successfully employed to evaluate the model parameters in the column mode. The results indicated that the DPOC can be applied as an effective and eco-friendly biosorbent for the removal of Zn(II) ions in polluted wastewater. (C) 2015 Elsevier Ltd. All rights reserved.
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页码：161 / 170
页数：10
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