• A Feasibility Assessment of CMDS (Coal Mine Drainage Sludge) in the Stabilization of Mercury Contaminated Soil in Mine Area

  • Il-Ha Koh1·Yo Seb Kwon1,2·Deok Hyun Moon3·Ju In Ko4·Won Hyun Ji4*

  • 1National Environment Lab. (NeLab), Seoul 02841, Korea
    2Department of Energy and Mineral Resources Engineering, Sejong University, Seoul 05006, Korea
    3Department of Environmental Engineering, Chosun University, Gwangju 61452, Korea
    4Institute of Mine Reclamation Technology, Mine Reclamation Corporation, Gangwon-Do 26464, Korea

  • 광산지역 수은 오염토양 안정화를 위한 석탄광산배수슬러지의 적용성 평가

  • 고일하1·권요셉1,2·문덕현3·고주인4·지원현4*

  • 1환경기술정책연구원
    2세종대학교 에너지자원공학과
    3조선대학교 환경공학과
    4한국광해관리공단 기술연구소

Abstract

This study assessed the feasibility of coal mine drainage sludge (CMDS) as a stabilizing agent for mercury contaminated soil through pot experiments and batch tests. In the pot experiments with 43 days of lettuce growth, the bioavailability of mercury in the amended soil and mercury content of the lettuce were decreased by 46% and 50%, respectively. These results were similar to those of the soil amended with the sulfide compound (FeS) generally used for mercury stabilization. Thus, CMDS could be an attractive mercury stabilizer in terms of industrial by-product recycling. Batch tests were conducted to examine mercury fractionation including reactions between the soil and acetic acid. The result showed that some elemental fraction changed to strongly bounded fraction rather than residual (HgS) fraction. This made it possible to conclude that mercury adsorption on oxides in CMDS was the major mechanism of stabilization.


Keywords: Mercury, Stabilization, CMDS (coal mine drainage sludge), Bioavailability, Fractionation

This Article

  • 2020; 25(1): 53-61

    Published on Mar 31, 2020

  • 10.7857/JSGE.2020.25.1.053
  • Received on Dec 17, 2019
  • Revised on Feb 6, 2020
  • Accepted on Mar 17, 2020

Correspondence to

  • Won Hyun Ji

  • Institute of Mine Reclamation Technology, Mine Reclamation Corporation, Gangwon-Do 26464, Korea

  • E-mail: greenidea@mireco.or.kr