Economic and Environmental Geology (자원환경지질)
- Volume 33 Issue 5
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- Pages.405-415
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- 2000
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
Formation of Acid Mine Drainage and Pollution of Geological Environment Accompanying the Sulfidation Zone of Nonmetallic Deposits: Reaction Path Modeling on the Formation of AMD of Tongnae Pyrophyllite Mine
비금속광상의 황화광염대에 수반되는 산성광산배수의 형성과 지질환경의 오염 : 동래납석광산 산성광산배수의 형성에 관한 반응경로 모델링
Abstract
This study was carried out to understand the formation of acid mine drainage (AMD) by pyrophyllite (so-called Napseok)-rainwater interaction (weathering), dispersion patterns of heavy metals, and patterns of mixing with non-polluted water in the Tongnae pyrophyllite mine. Based on the mass balance and reaction path modeling, using both the geochemistry of water and occurrence of the secondary minerals (weathering products), the geochemical evolution of AMD was simulated by computer code of SOLVEQ and CHILLER. It shows that the pH of stream water is from 6.2 to 7.3 upstream of the Tongnae mine. Close to the mine, the pH decreases to 2. Despite being diluted with non-polluted tributaries, the acidity of mine drainage water maintains as far as downstream. The results of modeling of water-rock interaction show that the activity of hydrogen ion increases (pH decreases), the goncentration of
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