Inhibition of pyrite oxidation by surface coating agents: Batch and field studies

Title
Inhibition of pyrite oxidation by surface coating agents: Batch and field studies
Authors
최재영지은도윤현식이우람박영태
Keywords
AMD; coating
Issue Date
2013-04
Publisher
European Geosciences Union
Abstract
The batch results of this study indicate that chemical oxidation of pyrite and YD and IG mine samples can be reduced significantly by amending phosphate or cement as coating agents. The phos-phate treatment resulted in the formation of an iron-phosphate coating, and cement was precipitated as calcium sulfate by hydra-tion on pyrite surfaces. Pilot scale tests with the phosphate coating agent were performed and showed that the microencapsulation technique applied to the AMD site is promising. The production of SO42− from sulfide oxidation rapidly decreased by amending KH2PO4 to a background level within 15 days, and this effect was maintained for 100 days (93.1% reduction). Future studies are necessary to explore the long-term stability of the phos-phate coatings to reduce the dissolved metals and sulfate at AMD sites.
URI
http://pubs.kist.re.kr/handle/201004/45032
Appears in Collections:
KIST Publication > Conference Paper
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