The Machanism of Bacterial Oxidation of Sulphides     

Wang Ende Shenyang Institute of Gold Technology  Shenyang  Liaoningand Guan Guangyue Northeast U niversity of Technology  Shenyang  Liaoniny 《《地质学报》英文版》1994,68(1):31-42

The bacteria used in the experiment are Thiobacillus Ferrooxidans separated from acidic mine water in sulphide deposits. The chemoautotrophic bacteria can act directly on sulphides and accelerate the oxidation of sulphides. The experiment shows that the bacteria, as an important microbial factor of gold's supergenous enrichment within the oxidized zones of sulphide deposits, are helpful to dissolve gold and silver in ferric sulphate. In the bacterial oxidation process, the precipitation of goethite is concerned both with the lower activity of ferric ions and with the existence of carbonates in solution. Meanwhile, the acid-resisting and oxidizing ability of the bacteria will certainly lead up to a microbial way of treating the acidic mine water.  相似文献