- Development of Control Technology for Acid Mine Drainage by Coating on the Surface of Pyrite using Chemicals
- Ji, Min-Kyu;Yoon, Hyun-Sik;Ji, Eung-Do;Lee, Woo-Ram;Park, Young-Tae;Yang, Jung-Seok;Jeon, Byong-Hun;Shim, Yon-Sik;Kang, Man-Hee;Choi, Jae-Young;
- Natural Products Center, KIST-Gangneung;Natural Products Center, KIST-Gangneung;Natural Products Center, KIST-Gangneung;Natural Products Center, KIST-Gangneung;Natural Products Center, KIST-Gangneung;Natural Products Center, KIST-Gangneung;Department of Environmental Engineering, Yonsei University;Mine Reclamation Corporation;Mine Reclamation Corporation;Natural Products Center, KIST-Gangneung;
- 산성광산배수의 발생저감을 위한 황철석 표면의 피막형성 기술개발
- 지민규;윤현식;지은도;이우람;박영태;양중석;전병훈;심연식;강만희;최재영;
- 한국과학기술연구원;한국과학기술연구원;한국과학기술연구원;한국과학기술연구원;한국과학기술연구원;한국과학기술연구원;연세대학교 환경공학부;한국광해관리공단;한국광해관리공단;한국과학기술연구원;
Abstract
Acid mine drainage occurs when sulfide minerals are exposed to an oxidizing environment. The objective of this study was to inhibit the oxidation of pyrite by applying various coating agent such as $KH_2PO_4$ , MgO and $KMnO_4$ over its surface as an oxidation inhibitors. Experiments were conducted for 8 days to test the feasibility of oxidation inhibitors. The optimal condition of coating agent for standard pyrite and IK mine was the combination of 0.01M $KH_2PO_4$ , 0.01M NaOAc and 0.01M NaClO. Otherwise, for YD mine the combination of 0.01M $KMnO_4$ , 0.01M NaOAc and 0.01M NaClO. The $SO_4^{2-}$ reduction efficiency of pyrite, IK and YD mine samples was 70, 92 and 84%, respectively. For 8 days, no significant increase of $SO_4^{2-}$ from pyrite sample coated with inhibitor was observed. The pH of solution remains in between 4 to 6 for the reaction conditions.
Keywords: Pyrite;AMD;Surface coating agent;Tailing;
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