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자료유형
학술대회자료
저자정보
Kim, Hee-Joung (Department of Environmental Science, Kangwon National University) Yang, Jae-E. (Division of Environmental & Biological Engineering, Kangwon National University) Lee, Jai-Young (Department of Environmental Eng., University of Seoul) Park, Beang-Kil (Department of Environmental Lab., Co.) Choi, Sang-Il (Department of Environmental Engineering, Kwangwoon University) Jun, Sang-Ho (Department of Environmental Science, Kangwon National University)
저널정보
한국지하수토양환경학회 한국지하수토양환경학회 학술발표회 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
발행연도
2004.1
수록면
167 - 174 (8page)

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Several metalliferous and coal mines, including Myungjin, Seojin and Okdong located at the upper watershed of Okdong stream, were abandoned or closed since 1988 due to the mining industry promotion policy and thus disposed an enormous amount of mining wastes without a proper treatment facilities, resulting in water pollution in the downstream areas. AMD and waste effluents from the closed coal mines were very strongly acidic showing pH ranges of 2.7 to 4.5 and had a high level of total dissolved solid (TDS) showing the ranges of 1,030 to 1,947 mg/L. Also heavy metal concentrations in these samples such as Fe, Cu, Cd and anion such as sulfate were very high. These parameters of AMD and effluents were considered to be highly polluted as compared to those in the main stream area of the Okdong river and be major pollutants for water and soil in tile downstream area. Pollution indices of the surface water at the upper stream of Okdong river where AMD of the abandoned coal mines was flowed into main stream were in the ranges of 16.3 to 47.1. On the other hand, those at the mid stream where effluents from tailing dams and coal mines flowed into main stream were in tile ranges of 10.6 to 19.5. However, those at the lower stream were ranged from 10.6 to 14.9 These results indicated that mining wastes such as AMD and effluents from the closed mines were tile major source to water pollution at the Okdong stream areas.

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