• Evaluation of Surface Water-preventing Materials on Stabilization of Contaminants in Tailings
  • Kim, Young-Kyu;Jung, Myung-Chae;Kim, Jung-Yul;Kim, Yoo-Sung;Lee, Jin-Soo;Park, Kwan-In;
  • Department of Energy and Mineral Resources Engineering, Sejong University;Department of Energy and Mineral Resources Engineering, Sejong University;Soam Consultant;Soam Consultant;Institute of Mine Reclamation Technology, Mine Reclamation Corporation;Institute of Mine Reclamation Technology, Mine Reclamation Corporation;
  • 광물찌꺼기에 함유된 오염물질의 안정화를 위한 표면 차폐재의 성능 평가
  • 김영규;정명채;김중열;김유성;이진수;박관인;
  • 세종대학교 공과대학 에너지자원공학과;세종대학교 공과대학 에너지자원공학과;(주)소암컨설턴트;(주)소암컨설턴트;한국광해관리공단 광해기술연구소;한국광해관리공단 광해기술연구소;
Abstract
This study examined evaluation on stabilization of major and trace elements in tailings by various surface water-preventing materials. Six columns were filled with tailings of the Sinlim mine, then covered with tailings only, compacted soils, clay, soil-bentonite mixture, pozzolan and bentonite mat. After injection of artificial rain water, the leachate was sampled with times (3, 6, 9 and 12 pore volume) and analysed for major (Ca, Na, Mg, K) and trace elements (As, Cd, Cu, Pb, Zn) by ICP-AES. With exception to pozzolan type, the pH values of leachate from the other types became stabilized from 5.5 to 7.5, and EC (electric conductivity) of leachate from them decreased with times. For the pozzolan type, however, the pH and EC of leachate increased with time due to its alkalinity producing system. Concentrations of most major and trace elements in leachate decreased and stabilized with time. Consequently, soil-bentonite mixed cover shows the best ability of water-preventing and reducing mobility of elements in tailings site.

Keywords: Column test;Heavy metals;Surface water-preventing materials;Stabilization;Tailings;

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