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土壤颗粒级配对镉吸附-解吸规律的影响

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袁志业, 白顺果, 姜永海, 李翔, 安达, 杨昱, 张进保. 土壤颗粒级配对镉吸附-解吸规律的影响[J]. 环境工程学报, 2013, 7(5): 1979-1983.
引用本文: 袁志业, 白顺果, 姜永海, 李翔, 安达, 杨昱, 张进保. 土壤颗粒级配对镉吸附-解吸规律的影响[J]. 环境工程学报, 2013, 7(5): 1979-1983.
shu
Yuan Zhiye, Bai Shunguo, Jiang Yonghai, Li Xiang, An Da, Yang Yu, Zhang Jinbao. Effect of soil grain size gradation on sorption and desorption of cadmium[J]. Chinese Journal of Environmental Engineering, 2013, 7(5): 1979-1983.
Citation: Yuan Zhiye, Bai Shunguo, Jiang Yonghai, Li Xiang, An Da, Yang Yu, Zhang Jinbao. Effect of soil grain size gradation on sorption and desorption of cadmium[J]. Chinese Journal of Environmental Engineering, 2013, 7(5): 1979-1983.
shu

土壤颗粒级配对镉吸附-解吸规律的影响

  • 1.

    中国环境科学研究院,北京 100012

  • 2.

    河北农业大学城乡建设学院,保定 071000

  • 3.

    中国环境科学研究院,北京 100012

  • 基金项目:

    农业活动区农药污染地下水风险评估系统管理技术研究(201109009)

    国家自然科学基金资助项目(51208487)

  • 中图分类号: X53

Effect of soil grain size gradation on sorption and desorption of cadmium

  • 1.

    Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • 2.

    College of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071000, China

  • 3.

    Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • Fund Project:

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  • 摘要: 利用甘肃金川某地土壤通过批实验进行等温吸附和动力学解吸实验,研究不同颗粒级配的中砂对镉的吸附、解吸特征,并采用Freundlich和一级动力学方程对其吸附解吸方程进行拟合。结果表明,(1)Freundlich和一级动力学方程对该土壤吸附、解吸镉的实验适用;(2)等温吸附实验中4组不同颗粒级配的中砂对镉的吸附性很强,最大平衡吸附量依次为260.667、286.107、299.362和292.232 mg/kg,吸附性能与颗粒级配中的细粒土相对含量大小成正比;(3)4组土壤对镉的解吸在初期2 h内解吸速率均较快,在3 h左右达到吸附-解吸平衡。平衡后4组土样Ⅰ、Ⅱ、Ⅲ和Ⅳ的最大解吸量依次为0.752、0.561、0.44和0.54 mg/kg,解吸速率和平衡时最大解吸量均与颗粒级配中细颗粒相对含量密切相关。
    Abstract: Study on effect of different grain size gradation of the medium sand on adsorption and desorption of Cd was conducted through batch test of isothermal adsorption and desorption dynamic of soil in Jinchuan City of Gansu Province. And adsorption and desorption equations were fitted by Freundlich and one-order dynamic equations. The results show that: (1) Freundlich and one-order dynamic equations are suitable for the test of adsorption and desorption of cadmium in soil. (2) Four groups of medium sand with different grain size gradation have strong adsorption ability to Cd, and the amounts of maximum equilibrium adsorption are 260.667,286.107,299.362,292.232,292.232 mg/kg, respectively. Adsorption ability is proportional to the size of relative content of fine-grained soils. (3) In the early 2 hours, the desorption rates of four groups are faster, and sorption/desorption equilibrium is reached in about 3 hours. Maximum of desorption content are 0.752,0.561,0.44,0.54 mg/kg, respectively after adsorption equilibrium. The desorption rates and maximum of desorption contents are closely correlative to fine particles contents in grain size gradation.
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  • 收稿日期:  2012-02-29
  • 刊出日期:  2013-05-22
袁志业, 白顺果, 姜永海, 李翔, 安达, 杨昱, 张进保. 土壤颗粒级配对镉吸附-解吸规律的影响[J]. 环境工程学报, 2013, 7(5): 1979-1983.
引用本文: 袁志业, 白顺果, 姜永海, 李翔, 安达, 杨昱, 张进保. 土壤颗粒级配对镉吸附-解吸规律的影响[J]. 环境工程学报, 2013, 7(5): 1979-1983.
shu
Yuan Zhiye, Bai Shunguo, Jiang Yonghai, Li Xiang, An Da, Yang Yu, Zhang Jinbao. Effect of soil grain size gradation on sorption and desorption of cadmium[J]. Chinese Journal of Environmental Engineering, 2013, 7(5): 1979-1983.
Citation: Yuan Zhiye, Bai Shunguo, Jiang Yonghai, Li Xiang, An Da, Yang Yu, Zhang Jinbao. Effect of soil grain size gradation on sorption and desorption of cadmium[J]. Chinese Journal of Environmental Engineering, 2013, 7(5): 1979-1983.
shu

土壤颗粒级配对镉吸附-解吸规律的影响

  • 1.  中国环境科学研究院,北京 100012
  • 2.  河北农业大学城乡建设学院,保定 071000
  • 3. 中国环境科学研究院,北京 100012
  • 收稿日期:  2012-02-29
基金项目:

农业活动区农药污染地下水风险评估系统管理技术研究(201109009)

国家自然科学基金资助项目(51208487)

摘要: 利用甘肃金川某地土壤通过批实验进行等温吸附和动力学解吸实验,研究不同颗粒级配的中砂对镉的吸附、解吸特征,并采用Freundlich和一级动力学方程对其吸附解吸方程进行拟合。结果表明,(1)Freundlich和一级动力学方程对该土壤吸附、解吸镉的实验适用;(2)等温吸附实验中4组不同颗粒级配的中砂对镉的吸附性很强,最大平衡吸附量依次为260.667、286.107、299.362和292.232 mg/kg,吸附性能与颗粒级配中的细粒土相对含量大小成正比;(3)4组土壤对镉的解吸在初期2 h内解吸速率均较快,在3 h左右达到吸附-解吸平衡。平衡后4组土样Ⅰ、Ⅱ、Ⅲ和Ⅳ的最大解吸量依次为0.752、0.561、0.44和0.54 mg/kg,解吸速率和平衡时最大解吸量均与颗粒级配中细颗粒相对含量密切相关。

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