Biogeochemical Properties of Bacteriogenic Iron Oxides

  title={Biogeochemical Properties of Bacteriogenic Iron Oxides},
  author={F. Grant Ferris},
  journal={Geomicrobiology Journal},
  pages={79 - 85}
  • F. G. Ferris
  • Published 1 April 2005
  • Chemistry
  • Geomicrobiology Journal
Bacteriogenic iron oxides (BIOS) are composite materials that consist of intact and partly degraded remains of bacterial cells intermixed with variable amounts of poorly ordered hydrous ferric oxide (HFO) minerals. They form in response to chemical or bacterial oxidation of Fe2+, which gives rise to Fe3+. Once formed, Fe3+ tends to undergo hydrolysis to precipitate in association with bacterial cells. In acidic systems where the chemical oxidation of Fe2+ is slow, bacteria are capable of… 

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