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Li Xiangping, Zhang Fei, Qi Jianying, Chen Yongheng. Effects of organic matter on thallium adsorption-desorption in soils[J]. Chinese Journal of Environmental Engineering, 2012, 6(11): 4245-4250.
Citation: Li Xiangping, Zhang Fei, Qi Jianying, Chen Yongheng. Effects of organic matter on thallium adsorption-desorption in soils[J]. Chinese Journal of Environmental Engineering, 2012, 6(11): 4245-4250.
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Effects of organic matter on thallium adsorption-desorption in soils

  • 1.

    School of Chemical and Engineer, Analytical and Testing Center, Guangzhou University, Guangzhou 510006,China

  • 2.

    School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006,China

  • 3.

    South China Institute of Environmental Science, Ministy of Environmental Protection of People’s Republic of China, Guangzhou 510655,China

  • Received Date: 08/05/2012
    Accepted Date: 29/03/2012
    Available Online: 09/11/2012
    Fund Project:
  • The effects of present organic matter in red soil and loess on the Tl+ adsorption-desorption behaviors were investigated. The results showed that the adsorption of Tl+ by both red soil and loess was remarkabley decreased after the removal of soil organic matter (SOM). The reduce in Tl+ adsorption capacity varied with different initial Tl+ concentrations, and the greatest degree was 24.7% and 28.2% for red soil and loess, respectively. The greatest decrease degree in Tl+ adsorption rate by loess was about 20%, which was higher than that by red soil. The contribution of SOM to the Tl+ adsorption by loess and red soil was 39.2% and 32.8%, respectively. In addition, the desorption of Tl+ from both loess and red soil was enhanced after the removal of SOM, particularly for high initial Tl+ concentration. When the initial Tl+ concentration was 20 mg/L, the desorption rate increased to 60.8% and 65.5% for red soil and loess, respectively.
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Effects of organic matter on thallium adsorption-desorption in soils

  • Received Date: 08/05/2012
  • Accepted Date: 29/03/2012
  • Available Online: 09/11/2012
Fund Project:

Abstract: The effects of present organic matter in red soil and loess on the Tl+ adsorption-desorption behaviors were investigated. The results showed that the adsorption of Tl+ by both red soil and loess was remarkabley decreased after the removal of soil organic matter (SOM). The reduce in Tl+ adsorption capacity varied with different initial Tl+ concentrations, and the greatest degree was 24.7% and 28.2% for red soil and loess, respectively. The greatest decrease degree in Tl+ adsorption rate by loess was about 20%, which was higher than that by red soil. The contribution of SOM to the Tl+ adsorption by loess and red soil was 39.2% and 32.8%, respectively. In addition, the desorption of Tl+ from both loess and red soil was enhanced after the removal of SOM, particularly for high initial Tl+ concentration. When the initial Tl+ concentration was 20 mg/L, the desorption rate increased to 60.8% and 65.5% for red soil and loess, respectively.

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