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Environmental Concerns. Besides Accidents Acid Mine Drainage Acid rain Increasing atmospheric CO 2 Mine reclamation (subsidence) Coal seam fires. Acid Mine Drainage. Sulphur is bound in organic mararels and in Fe sulphides (marcasite and pyrite)
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Environmental Concerns • Besides Accidents • Acid Mine Drainage • Acid rain • Increasing atmospheric CO2 • Mine reclamation (subsidence) • Coal seam fires
Acid Mine Drainage • Sulphur is bound in organic mararels and in Fe sulphides (marcasite and pyrite) • Why? Originally from sulphates in groundwater and reduced by bacterial action in coal formation
Acid Rain • From burning of coal releases SO2. Needs S scrubbers