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Acid Mine Drainage

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Talks about the issues behind acid mine drainage and how it forms chemically and how society can fix and reduce the affects of it and reduce how much is produced

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4 Pages Essays / Projects < 1 Year old
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Acid Mine Drainage
Topics this document covers:
Chemistry Environmental impact of mining Matter Sulfide minerals Acid mine drainage Metallurgical processes Sulfuric acid Pyrite Iron(II) sulfide Tailings Acid sulfate soil Acidophiles in acid mine drainage
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Topics this document covers:
Chemistry Environmental impact of mining Matter Sulfide minerals Acid mine drainage Metallurgical processes Sulfuric acid Pyrite Iron(II) sulfide Tailings Acid sulfate soil Acidophiles in acid mine drainage
Sample Text:
Acid Mine Drainage (AMD) is essentially the same process, greatly magnified. When large quantities of rock containing sulphide minerals are excavated from an open pit or opened up in an underground mine, it reacts with water and oxygen to create sulphuric acid. When the water reaches a certain level of acidity, a naturally occurring type of bacteria called Thiobacillus ferroxidans will act as a catalyst, accelerating the oxidation and acidification processes, leaching more trace metals from the wastes. The acid will leach from the rock as long as its source rock is exposed to air and water and until the sulphides are leached out, a process that can last hundreds, even thousands of years. Acid is carried off the mine site by rainwater or surface drainage and deposited into nearby streams, rivers, lakes and groundwater. AMD degrades water ...
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