Inhibition of sulfide mineral oxidation by surface coating agents: Batch and field
- Inhibition of sulfide mineral oxidation by surface coating agents: Batch and field
- 지민규; 지은도; 윤현식; 이우람; 박영태; 무니스 알리 칸; 전병훈; 최재영
- Acid mine drainage; Pyrite; Sulfide mineral; Surface coating agent
- Issue Date
- Journal of hazardous materials
- VOL 229-230, 298-306
- The potential of several surface coating agents to inhibit the oxidation of metal sulfide minerals from
Young-Dong coal mine and the Il-Gwang gold mine was examined by conducting laboratory scale batch
experiments and field tests. Powdered pyrite as a standard sulfide mineral and rock samples from two
mine outcrops were mixed with six coating agents (KH2PO4, MgO and KMnO4 as chemical agents, and
apatite, cement and manganite as mineral agents) and incubated with oxidizing agents (H2O2 or NaClO).
For the observed time period (8 days), Young-Dong coal mine samples exhibited the least sulfate (SO42−)
production in the presence of KMnO4 (16%) or cement (4%) while, for Il-Gwang mine samples, the least
SO42− production was observed in presence of KH2PO4 (8%) or cement (2%) compared to control. Fieldscale
pilot tests at the Il-Gwang site also showed that addition of KH2PO4 decreased SO4
from 200 to 13 mg L−1 and it also reduced Cu and Mn from 8 and 3 mg L−1, respectively to <0.05 mg L−1
(below ICP-OES detection limits). The experimental results suggested that the use of surface coating
agents is a promising alternative for sulfide oxidation inhibition at acid mine drainage sites.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.