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2022 Vol.27, Issue 4 Preview Page
Stabilization of Two Mine Drainage Treated Sludges for the As and Heavy Metal Contaminated Soils

오염토양 특성별 광산배수처리슬러지의 비소 및 중금속 안정화

Hyunji Tak1
,
Soyoung Jeon1
,
Minhee Lee2*
탁현지 1
,
전소영 1
,
이민희 2*
1Major of Earth and Environmental Sciences, Division of Earth Environmental System Science, Pukyong National University, Busan 48513, Korea
2Major of Environmental Geosciences, Division of Earth Environmental System Science, Pukyong National University, Busan 48513, Korea
1부경대학교 지구환경시스템과학부 지구환경과학전공
2부경대학교 지구환경시스템과학부 환경지질과학전공
*Corresponding Author
31 August 2022. pp. 10-21
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Abstract

In the South Korea, 47% of abandoned mines are suffering from the mining hazards such as the mine drainage (MD), the mine tailings and the waste rocks. Among them the mine drainage which has a low pH and the high concentration of heavy metals can directly contaminate rivers or soil and cause serious damages to human health. The natural/artificial treatment facilities by using neutralizers and coagulants for the mine drainage have been operated in domestic and most of heavy metals in mind drainage are precipitated and removed in the form of metal hydroxide, alumino-silicate or carbonate, generating a large amount of mine drainage treated sludge (‘MDS’ hereafter) by-product. The MDS has a large surface area and many functional groups, showing high efficiency on the fixation of heavy metals. The purpose of this study is to develop a ingenious heavy metal stabilizer that can effectively stabilize arsenic (As) and heavy metals in soil by recycling the MDS (two types of MDS: the acid mine drainage treated sludge (MMDS) and the coal mine drainage treated sludge (CMDS)). Various analyses, toxicity evaluations, and leaching reduction batch experiments were performed to identify the characteristics of MDS as the stabilizer for soils contaminated with As and heavy metals. As a result of batch experiments, the Pb stabilization efficiency of both of MDSs for soil A was higher than 90% and their Zn stabilization efficiencies were higher than 70%. In the case of soil B and C, which were contaminated with As, their As stabilization efficiencies were higher than 80%. Experimental results suggested that both of MDSs could be successfully applied for the As and heavy metal contaminated soil as the soil stabilizer, because of their low unit price and high stabilization efficiency for As and hevry metals.

Keywords
Adsorption
Arsenic
Heavy metal
Mine drainage
Mine drainage treated sludge
Soil pollution
Stabilization
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 27
  • No :4
  • Pages :10-21
  • Received Date : 2022-08-05
  • Revised Date : 2022-08-10
  • Accepted Date : 2022-08-24
  • DOI :https://doi.org/10.7857/JSGE.2022.27.4.010
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