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Adsorption-Desorption of Cd(II) and Pb(II) on Ca-Montmorillonite
Li Yan; Wang Ji-De; Wang Xiao-Jun; Wang Juan-Fang
2012
Source PublicationIndustrial and Engineering Chemistry Research
ISSN8885885
Volume51Issue:18Pages:6520-6528
AbstractThe 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.
Subject AreaEngineering
DOI10.1021/ie203063s
WOS IDWOS:000303698100027
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/1373
Collection资源化学研究室
AffiliationXinjiang 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
GB/T 7714
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.
APA Li Yan,Wang Ji-De,Wang Xiao-Jun,&Wang Juan-Fang.(2012).Adsorption-Desorption of Cd(II) and Pb(II) on Ca-Montmorillonite.Industrial and Engineering Chemistry Research,51(18),6520-6528.
MLA Li Yan,et al."Adsorption-Desorption of Cd(II) and Pb(II) on Ca-Montmorillonite".Industrial and Engineering Chemistry Research 51.18(2012):6520-6528.
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