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Biogeochemistry of acid mine drainage and a method to control acid formation.
Kleinmann-RLP; Crerar-DA; Pacelli-RR
Min Eng 1981 Mar; 33(3):300-305
A bacterium, Thiobacillus ferrooxidans, is of prime importance in the formation of acid drainage from pyritic material. Above ph 4.5, T. Ferrooxidans increases initial acidification; below ph 4.5, It allows acidification to continue by oxidizing Fe2+. Below a ph of approximately 2.5, The activity of Fe3+ is significant and results in steady-state cycling between oxidation of pyrite by Fe3+ and bacterial oxidation of Fe2+. Laboratory and field tests demonstrate that inhibition of T. Ferrooxidans by controlled release of anionic detergents can inexpensively reduce pyrite oxidation and acid formation.
Mining-industry; Bacteria; Waste-treatment; Environmental-pollution
OP; Journal Article
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Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division