Development of Control Technology for Acid Mine Drainage by Coating on the Surface of Pyrite using Chemicals
- Development of Control Technology for Acid Mine Drainage by Coating on the Surface of Pyrite using Chemicals
- 지민규; 윤현식; 지은도; 이우람; 박영태; 양중석; 전병훈; 심연식; 강만희; 최재영
- Pyrite; AMD; Surface coating agent; tailing
- Issue Date
- VOL 15, NO 4, 46-52
- 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 KH2PO4, MgO and KMnO4 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 KH2PO4, 0.01M
NaOAc and 0.01M NaClO. Otherwise, for YD mine the combination of 0.01M KMnO4, 0.01M NaOAc and 0.01M
NaClO. The SO42− reduction efficiency of pyrite, IK and YD mine samples was 70, 92 and 84%, respectively. For 8 days,
no significant increase of SO42− from pyrite sample coated with inhibitor was observed. The pH of solution remains in
between 4 to 6 for the reaction conditions.
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