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学科主题: Engineering
题名: Adsorption-Desorption of Cd(II) and Pb(II) on Ca-Montmorillonite
作者: Li Yan; Wang Ji-De; Wang Xiao-Jun; Wang Juan-Fang
刊名: Industrial and Engineering Chemistry Research
发表日期: 2012
DOI: 10.1021/ie203063s
卷: 51, 期:18, 页:6520-6528
摘要: The adsorption and desorption of Cd(II) and Pb(II) on Ca-montmorillonite have been investigated. The maximum removal efficiency of Cd(II) reaches 98% at the initial concentration of 50.00 mg L-1, while it is about 70% for Pb(II) at the initial concentration of 58.79 mg L-1. Experimental results indicate that adsorption reactions of Cd(II) and Pb(II) on Ca-montmorillonite agree well with second-order kinetics and the Langmuir isotherm model. Cd(II) and Pb(II) on Ca-montmorillonite are successfully desorbed by NaCl solution of high concentration. Data shows that desorption efficiencies are mainly influenced by the concentration of NaCl and temperature. The optimum desorption concentrations of NaCl for Cd(II) and Pb(II) are 1 mol and 3 mol respectively, where the adsorption efficiencies can reach 93% and 83%. The results of 4-time consecutive adsorption desorption show that the method of desorption by NaCl solution is efficient and practical. Samples before and after adsorption or desorption have been characterized by X-ray diffraction, which are consistent with the results mentioned above.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/1373
Appears in Collections:资源化学研究室_期刊论文

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作者单位: Xinjiang Univ, Urumqi 830046, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China;Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Li Yan,Wang Ji-De,Wang Xiao-Jun,et al. Adsorption-Desorption of Cd(II) and Pb(II) on Ca-Montmorillonite[J]. Industrial and Engineering Chemistry Research,2012,51(18):6520-6528.
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