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Volume 44 Issue 10
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ZHOU Ya-dong, ZHAI Xin-dong, YANG Wen-qing. One-dimensional coupled model for large-deformation electroosmotic consolidation and heavy metal ion migration of silt[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(10): 1827-1836. DOI: 10.11779/CJGE202210008
Citation: ZHOU Ya-dong, ZHAI Xin-dong, YANG Wen-qing. One-dimensional coupled model for large-deformation electroosmotic consolidation and heavy metal ion migration of silt[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(10): 1827-1836. DOI: 10.11779/CJGE202210008
shu

One-dimensional coupled model for large-deformation electroosmotic consolidation and heavy metal ion migration of silt

  • 1.

    Key Laboratory of Soft Soils and Engineering Environment of Tianjin Province, Tianjin Chengjian University, Tianjin 300384, China

  • 2.

    College of Civil Engineering, Tongji University, Shanghai 200092, China

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  • Received Date: October 07, 2021
  • Available Online: December 11, 2022
    Graphical Abstract
    • Abstract
  • Dewatering and metal removal of silt can be obtained by applying electrokinetics. A coupled model for one-dimensional electroosmosis consolidation and ion migration, called ECT1, is proposed. It employs the piecewise linear finite difference method to simulate the ion migration and large-strain consolidation of soils under the coupling action of electric field, seepage field and chemical field, and to account for the nonlinear variation of physical and electro-chemical properties of soils, such as adsorption/desorption, neutralization/ionization, and precipitation/dissolution. The model is verified by Alshawabkeh's electrokinetic remediation experimental results for contaminated soil, numerical solutions and treatment tests on high-moisture content heavy metal-contaminated soil electrokinetic. The proposed model is applied to example studies to elucidate the coupling mechanism of heavy metal migration and consolidation in the electrokinetic treatment of high-moisture content contaminated silt.
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    • References (24)
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