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铬污染土壤超低频复电阻率频散特性

朱 勇 能昌信 陆晓春 王玉玲

朱 勇, 能昌信, 陆晓春, 王玉玲. 铬污染土壤超低频复电阻率频散特性[J]. 环境科学研究, 2013, 26(5): 555-560.
引用本文: 朱 勇, 能昌信, 陆晓春, 王玉玲. 铬污染土壤超低频复电阻率频散特性[J]. 环境科学研究, 2013, 26(5): 555-560.
ZHU Yong, NAI Chang-xin, LU Xiao-chun, WANG Yu-ling. The Complex Resistivity Dispersion Properties of Chromium-Contaminated Soil in the Ultra-Low Frequency Power Supply[J]. Research of Environmental Sciences, 2013, 26(5): 555-560.
Citation: ZHU Yong, NAI Chang-xin, LU Xiao-chun, WANG Yu-ling. The Complex Resistivity Dispersion Properties of Chromium-Contaminated Soil in the Ultra-Low Frequency Power Supply[J]. Research of Environmental Sciences, 2013, 26(5): 555-560.

铬污染土壤超低频复电阻率频散特性

基金项目: 国家高技术研究发展计划(863)项目(2009AA063101-2);2012年度院所基本科研项目(2012YSKY16);安徽省科技攻关项目(12010302080)

The Complex Resistivity Dispersion Properties of Chromium-Contaminated Soil in the Ultra-Low Frequency Power Supply

  • 摘要: 在超低频段(2-5~26Hz)内,研究了铬污染土壤复电阻率在不同含水率、铬含量和孔隙率下的幅值及相位频散特性. 结果显示,铬污染土壤复电阻率的幅值随频率的增大呈单调递减趋势,但相位随频率的变化曲线呈平放的S形. 含水率、铬含量和孔隙率的变化均会引起土壤复电阻率的幅值和相位大小的改变,而相位峰值的位置只对含水率及孔隙率的变化较为敏感,与铬含量变化的关系不大. 含水率从0.08增至0.24时可导致相位峰值的位置产生约8Hz的右移;而当w(Cr6+)从0.5g/kg增至4.0g/kg时,相位峰值的位置基本不发生变化. 表明铬含量和含水率的增大均会引起电阻率减小的异常现象,若单纯地使用电阻率很难区分引起这2种异常现象的原因,但结合土壤复电阻率频散特性特别是相位峰值的位置可以进行有效判别,进而可判定铬污染场地的铬含量分布.

     

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出版历程
  • 收稿日期:  2012-12-31
  • 修回日期:  2013-03-07
  • 刊出日期:  2013-05-25

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