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Assessment of Soil Stabilization for the Reduction of Environmental Risk of Lead-contaminated Soil Near a Smelter Site

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2021, 30(4), pp.215-224
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering
  • Received : June 29, 2021
  • Accepted : August 9, 2021
  • Published : August 31, 2021

In-Hong Yeo 1 YOON-YOUNG CHANG ORD ID 1

1광운대학교

Accredited

ABSTRACT

In this study, to investigate the effect of stabilization of Pb-contaminated soil near a smelter site for the reduction of environmental risk of Pb leaching, commercial stabilizers were amended with the Pb-contaminated soil and evaluated leaching characteristics of Pb in soil by TCLP and SPLP leaching test. Also, performing sequential extraction procedure speciation of Pb in the amended soil was investigated. Limestone, AC-2 (Amron), Metafix (Peroxychem) that possess stabilization performance towards heavy metal in soil and mass production is available were selected as candidates. AC-2 contained a CaCO3 and MgO crystalline phase, while Metafix had a Fe7S8 crystalline phase, according to XRD studies. Pb content in SPLP extract was lower than the South Korean drinking water standard for Pb in groundwater at 4% AC-2 and Metafix treatment soil, and TCLP-based stabilization effectiveness was more than 90%. The findings of the sequential extraction method of soil treated with Metafix revealed that fractions 1 and 2 of Pb, which correspond to relatively high mobility and bioavailable fractions, were lowered, while the residual fraction (fraction 5) was raised. As a consequence, the order of performance for Pb stabilization in polluted soil was Metafix>AC-2>limestone.

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