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    ZHANG Jing, LI Min, YANG Hang, SUN De-zhi. Adsorption properties and mechanism of orthophosphate adsorption on soils from the Yeyahu Wetland of Beijing.[J]. Journal of Beijing Forestry University, 2013, 35(2): 118-124.
    Citation: ZHANG Jing, LI Min, YANG Hang, SUN De-zhi. Adsorption properties and mechanism of orthophosphate adsorption on soils from the Yeyahu Wetland of Beijing.[J]. Journal of Beijing Forestry University, 2013, 35(2): 118-124.
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    Adsorption properties and mechanism of orthophosphate adsorption on soils from the Yeyahu Wetland of Beijing.

    • College of Environmental Science and Technology, Beijing Forestry University, 100083, P. R. China.

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    • Received Date: December 31, 1899
    • Revised Date: December 31, 1899
    • Published Date: March 29, 2013
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    • In this study, the adsorption kinetics, isothermal adsorption model of orthophosphate (P) on soil from the Yeyahu Wetland of Beijing were investigated. The effects of pH and organic matter content on P adsorption were also analyzed. The results showed that the P adsorption equilibrium time was about five hours and Langmuir cross-shaped isothermal adsorption model well fitted the experiment data. pH had a significant influence on P adsorption. The P adsorption capability achieved the maximum value when the initial pH of the incubation solution was 8. Soil P adsorption capability increased with dissolved organic matters (DOM) increasing. When the concentration of DOM was 100 mg/L, the P adsorption capability reached the highest value and increased by 37.81%, 35.52% and 64.98%, respectively, for soil samples No. 3, 5 and 7 when compared with no DOM experiments. The results of XRD and FT-IR analysis of soil samples before and after P adsorption experiments reveal that kaolinite involved in P adsorption process and it is a key clay component for P adsorption on the Yeyahu Wetland soil of Beijing.
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