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http://dx.doi.org/10.7857/JSGE.2022.27.4.010

Stabilization of Two Mine Drainage Treated Sludges for the As and Heavy Metal Contaminated Soils  

Tak, Hyunji (Major of Earth and Environmental Sciences, Division of Earth Environmental System Science, Pukyong National University)
Jeon, Soyoung (Major of Earth and Environmental Sciences, Division of Earth Environmental System Science, Pukyong National University)
Lee, Minhee (Major of Environmental Geosciences, Division of Earth Environmental System Science, Pukyong National University)
Publication Information
Journal of Soil and Groundwater Environment / v.27, no.4, 2022 , pp. 10-21 More about this Journal
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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Times Cited By KSCI : 6  (Citation Analysis)
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