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http://dx.doi.org/10.9727/jmsk.2016.29.4.199

Mineralogy of Precipitates and Geochemisty of Stream Receiving Mine Water in the Sambong Coal Mine  

Woo, Eum Sik (National Institute of Environmental Research)
Kim, Young Hun (Department of Environmental Engineering, Andong National University)
Kim, Jeong Jin (Department of Earth and Environmental Sciences, Andong National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.29, no.4, 2016 , pp. 199-207 More about this Journal
Abstract
One of the most significant environmental issues in abandoned coal mine is acidic drainage which gives rise to the many environmental problems that acidifying streams water, sedimentation of iron/aluminium hydroxide, and pollution of water and soil. Water and precipitate samples for experiments were collected from stream and bottom in the pit mouth of Sambong mine. Mine water shows pH range from 7.24 to 7.94 in winter and 3.87 to 5.73 in summer season. The EC shows range from 432 to $897{\mu}S/cm$ at the stream receiving mine water. The highest concentrations of cations such as Mg, Al, Ca, and Mn are showing 15.50, 4.56, 85.30, 12.76 mg/L in the pit mouth, respectively. The reddish brown precipitates (Munsell color 10R-5YR in winter and 2.5YR-5Y in summer) consist mainly of 2-line ferrihydrite and schwertmannite. The precipitates are characterized by rod or cylindrical forms, and coccus or sphere of 0.1 to $0.5{\mu}m$ in diameter.
Keywords
abandoned coal mines; acid mine drainage; ferrihydrite; schwertmannite; precipitates;
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