Development of Control Technology for Acid Mine Drainage by Coating on the Surface of Pyrite using Chemicals

Title
Development of Control Technology for Acid Mine Drainage by Coating on the Surface of Pyrite using Chemicals
Authors
지민규윤현식지은도이우람박영태양중석전병훈심연식강만희최재영
Keywords
Pyrite; AMD; Surface coating agent; tailing
Issue Date
2010-08
Publisher
한국지하수토양환경학회지
Citation
VOL 15, NO 4, 46-52
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 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.
URI
http://pubs.kist.re.kr/handle/201004/38209
ISSN
1598-6438
Appears in Collections:
KIST Publication > Article
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