Stabilization of Arsenic in Soil around the Abandoned Coal-Mine Using Mine Sludge Pellets

광산슬러지 펠렛을 이용한 폐석탄광 주변 토양 내 비소 안정화 연구

  • Ko, Myoung-Soo (Department of Energy and Resources Engineering, Kangwon National University) ;
  • Ji, Won-Hyun (Institute of Mine Reclamation Technology, Mine Reclamation Corporation (MIRECO)) ;
  • Kim, Young-Gwang (School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST)) ;
  • Park, Hyun-Sung (Institute of Mine Reclamation Technology, Mine Reclamation Corporation (MIRECO))
  • 고명수 (강원대학교 에너지자원.산업공학부) ;
  • 지원현 (한국광해관리공단 기술연구소) ;
  • 김영광 (광주과학기술원 지구환경공학부) ;
  • 박현성 (한국광해관리공단 기술연구소)
  • Received : 2018.11.27
  • Accepted : 2018.12.24
  • Published : 2019.02.28


The purpose of this study was to assess the applicability of acid mine drainage sludge (AMDS) pellets for the arsenic (As) stabilization and to suggest an evaluation method for arsenic stabilization efficiency in soil around abandoned coal mines. The soil samples were collected from the agricultural field around Ham-Tae, Dong-Won, Dong-Hae, and Ok-Dong coal mine. The As concentration in soil was exceeding the criteria of soil pollution level, except for Ham-Tae coal mine. The AMDS pellets are more appropriate to use by reducing dust occurrence during the transport and application process than AMDS powder. In addition, AMDS pellets were maintained the As stabilization efficiency. The application of AMDS pellets for the As stabilization in soil was assessed by column experiments. The AMDS pellets were more effective than limestone and steel slag, which used as the conventional additives for the stabilization process. The As extraction by $0.43M\;HNO_3$ or $1M\;NaH_2PO_4$ solution were appropriate evaluation methods for evaluation of As stabilization efficiency in the soil.


abandoned coal mine;stabilization;arsenic;acid mine drainage sludge pellet;evaluation methods

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Fig. 1. As concentration in soil by aqua-regia digestion and sequential extraction. (a) Ham-Tae mine, (b) Dong-Won mine,(c) Dong-Hae mine, (d) Ok-Dong mine.

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Fig. 3. Arsenic concentrations in leachate from soil column (a) Dong-Won mine, (b) Dong-Hae mine.

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Fig. 4. Variation of (a) As, (b) pH, and (c) EC in leachate from As stabilization in soil column.

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Fig. 2. (a) Acid mine drainage sludge (AMDS) pellet and (b) As removal ratio by AMDS pellet, limestone and steel slag.

Table 1. Sequential extraction process for As in soil

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Table 2. Evaluation method for arsenic stabilization efficiency in soil

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Supported by : 한국연구재단, 한국광해관리공단


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