MICROBIAL OXIDATION OF FERROUS IRON IN ACID MINE WATER AT SULFUR AND IRON-SULFIDE MINE

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概要

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• The microbial oxidation of ferrous iron in the acid mine water from the abandoned Matsuo sulfur and iron-sulfide mine area was investigated. The acid mine water had an extremely low pH value and contained a high concentration of ferrous iron (about 1,000 ppm). The ferrous iron was oxidized rapidly to the ferric form in the acid mine water. The oxidation of ferrous iron in the acid mine water was completely inhibited by millipore filtration, toluene addition or incubation at a low temperature. These facts indicate that the oxidation of ferrous iron is not a spontaneous oxidation by atmospheric oxygen but a biological oxidation. Iron-oxidizing bacteria were ubiquitously found in the acid mine water samples taken from the mine area. The number of iron-oxidizing bacteria and the iron oxidation ratio along the Akagawa River were found to increase gradually as the stream ran down. The degree of iron oxidation was well correlated with the number of iron-oxidizing bacteria. From these results it is concluded that the activities of iron-oxidizing bacteria are responsible for the oxidation of ferrous iron in the acid mine water at the Matsuo Mine.

• 社団法人日本土壌肥料学会の論文

著者

• Wakao Norio

  Laboratory Of Applied Microbiology Department Of Agricultural Chemistry Faculty Of Agriculture Iwate

• Shiota Hideo

  Laboratory Of Applied Microbiology Department Of Agricultural Chemistry Faculty Of Agriculture Iwate

• Sakurai Yonekichi

  Laboratory Of Applied Microbiology Department Of Agricultural Chemistry Faculty Of Agriculture Iwate

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• Acid Resistance of Zn-Bacteriochlorophyll a from an Acidophilic Bacterium Acidiphilium rubrum
• Discovery of Natural Photosynthesis using Zn-Containing Bacteriochlorophyll in an Aerobic Bacterium Acidiphilium rubrum
• DISTRIBUTION OF ACIDOPHILIC IRON- AND SULPHUR-OXIDIZING BACTERIA IN A SULPHUR AND IRON SULPHIDE MINE
• SEASONAL VARIATIONS IN NUMBER OF ACIDOPHILIC IRON-OXIDIZING BACTERIA AND IRON OXIDATION IN THE RIVER CONTAMINATED WITH ACID MINE WATER
• MICROBIAL OXIDATION OF FERROUS IRON IN ACID MINE WATER AT SULFUR AND IRON-SULFIDE MINE

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