폐 금속 광산 오염 실태 정밀 조사
Intensive Study on Abandoned Metal Mining Sites
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Abstract
Metal contents in soil samples were determined by US EPA Method 3050A (EPA) and Korean Official Method for two different abandoned metal mining sites. Results by both methods are compared to evaluate the metal pollution in the studied areas. Metals in water samples in nearby streams and ground water were assessed. Strict quality control measures including method detection level study, duplicate analysis, and spike recovery test were practiced throughout the study to produce the reliable data. Spike recoveries for the determination of total metal content (EPA) in soil samples ranged from 76.9 to 104.3%, while those for bio-available content ranged from 76.9 to 106.2%. Arsenic concentration of soils in S mine tailing dam area exceeded the Korean warning level (37 times higher) and the threshold numbers of EU and Canada. Bio-available cadmium concentration of soils collected from E mine tailing dam area exceeded the Korean action level. A few soil samples from surrounding agricultural area near the S mine and E mine exceeded the Korean action levels and EU threshold number. No serious metal pollution was found in surface and sub-surface water samples near those mining sites.
참고문헌 (7)
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