Simultaneous stabilization of arsenic, lead, and copper in contaminated soil using mixed waste resources

Keun Young Lee, Deok Hyun Moon, Sang Ho Lee, Kyoung Woong Kim, Kyung Hoon Cheong, Jeong Hun Park, Yong Sik Ok, Yoon Young Chang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In the present study, stabilization treatment using waste resource stabilizers was performed for soil contaminated with As and heavy metals (Pb and Cu). Calcined oyster shell (COS) and coal mine drainage sludge (CMDS) were used as a mixed stabilizing agent for a wet-curing duration of 28 days. After the stabilization treatment, the treatment process efficiency was evaluated by the results of various batch- and column-leaching tests. Neutral and weak acid extraction methods, such as water-soluble extraction and SPLP, did not exhibit satisfactory results for heavy metal stabilization, even if they showed very low leachability. On the other hand, TCLP and 0.1 M HCl extraction showed that the stabilizers significantly reduced the amount of heavy metals leached from the soil, which strongly supports the thesis that the stabilization treatment is efficient in the acidic leaching conditions that were explored. Specifically, in the 0.1 M HCl extraction, the reduction efficiencies of As, Pb, and Cu leachings were more than 90 %, compared with control experiments. This study demonstrates that the application of waste resources for the stabilization of As and heavy metals is feasible. However, some limitations observed in the experiments should be considered in future studies, such as the mobilization of alkali-soluble elements, and in particular, exchangeable fractions of Cu. In addition, the treatment efficiency can be evaluated by different leaching methods, which suggests that multidirectional approaches are required for the proper evaluation of stabilization treatment.

Original languageEnglish
Pages (from-to)1813-1820
Number of pages8
JournalEnvironmental Earth Sciences
Volume69
Issue number6
DOIs
Publication statusPublished - 2013 Jul

Keywords

  • Arsenic
  • Calcined oyster shell
  • Coal mine drainage sludge
  • Heavy metal
  • Stabilization

ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Water Science and Technology
  • Soil Science
  • Pollution
  • Geology
  • Earth-Surface Processes

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