ACID MINE DRAINAGE

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Acid mine drainage (air asam tambang = Bahasa Indonesia) is water that commonly contaminated when pyrite, chalcopyrite or any iron sulfides, then highly exposed and reacts with air and water. This contaminant form sulfuric acid and dissolved iron. Some of or all of this iron contaminated can precipitate to form the red, orange, or yellow sediments that falls in the bottom of streams containing mine drainage. This kind of solutions is highly acid runoff and dissolves some of heavy metal particle such as lead, mercury, cooper that might be dispersion into ground or surface water. The intends action of certain bacteria (commonly sulfuric and an aerob bacteria) in acid mine drainage process also influenced the rate and degree of acid water.