Heavy metal removal from water by sorption using surfactant-modified montmorillonite
Heavy metal removal from water by sorption using surfactant-modified montmorillonite
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DOI：
10.1016/s0304-3894(02)00026-2
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发表时间：
2002-06-10
影响因子：
13.6
通讯作者：
Juang, RS
中科院分区：
文献类型：
--
作者：
Lin, SH;Juang, RS
研究了十二烷基硫酸钠（SDS）改性蒙脱土对水中Cu 2+和Zn 2+的吸附去除效果。实验作为溶液pH、溶质浓度和温度（25-55 ℃）的函数进行。采用Dubinin-Kaganer-Radushkevick模型描述单溶质吸附等温线。此外，二元溶质的吸附平衡可以合理地预测的竞争性Langmuir模型，其中的Langmuir参数直接从那些在单溶质系统中得到的。从温度依赖性确定了改性粘土吸附Cu ~（2+）和Zn ~（2+）的热力学参数（Δ H（o）和Δ S（o））。研究了金属离子的吸附动力学，并最终评估了伪一级速率常数。(C)2002 Elsevier Science B. V.保留所有权利。
Removal of Cu2+ and Zn2+ from aqueous solutions by sorption on the montmorillonite modified with sodium dodecylsulfate (SDS) was investigated. Experiments were carried out as a function of solution pH, solute concentration, and temperature (25-55 degreesC). The Dubinin-Kaganer-Radushkevick model was adopted to describe the single-solute sorption isotherms. Also, the binary-solute sorption equilibria could be reasonably predicted by the competitive Langmuir model, in which the Langmuir parameters were directly taken from those obtained in single-solute systems. The thermodynamic parameters (DeltaH(o) and DeltaS(o)) for Cu2+ and Zn2+ sorption on the modified clay were also determined from the temperature dependence. The kinetics of metal ions sorption was examined and the pseudo-first-order rate constant was finally evaluated. (C) 2002 Elsevier Science B.V. All rights reserved.