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Volume 36 Issue 2
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LIU Jing-jing, TANG Xiao-wu, WANG Yan. Competitive adsorption behavior and mechanism of loess towards Pb(II), Cu(II) and Cd(II)[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(2): 327-333. DOI: 10.11779/CJGE201402009
Citation: LIU Jing-jing, TANG Xiao-wu, WANG Yan. Competitive adsorption behavior and mechanism of loess towards Pb(II), Cu(II) and Cd(II)[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(2): 327-333. DOI: 10.11779/CJGE201402009
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Competitive adsorption behavior and mechanism of loess towards Pb(II), Cu(II) and Cd(II)

  • 1. Research Center of Costal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 2. Faculty of Architecture, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China

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  • Received Date: June 16, 2013
  • Published Date: February 20, 2014
    Graphical Abstract
    • Abstract
  • Lead, copper, cadmium is three kinds of typical heavy metal contaminants which can be used to simulate the solution of composite contaminate. The factors including the concentration and soil-water ratio are studied to investigate the competitive adsorption behaviors of loess towards Pb(II), Cu(II) and Cd(II). The adsorption test results can be interpreted by three isotherm models (i.e., Langmuir, Freundlich and D-R models) to certain extent. The preference ranking of loess to three heavy metal ions is Pb(II)>Cu(II)>Cd(II). Compared with those of single adsorption, the adsorption capacities of the competitive ions on loess decrease to some extent. Higher initial concentration of heavy metal ions leads to larger optimum adsorption amount of loess, and the adsorption removal efficiency decreases at the same time. The removal efficiency of three heavy metal ions from aqueous solution can be increased by increasing the solid-liquid ratio. The results may provide an evidence for loess as the containment barrier system as well as the adsorbent removing heavy metal containment in aquatic environment.
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    • References (20)
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