Dissimilatory metal reducing bacteria in biogeochemistry and corrosion

Richard A. Royer, Richard F. Unz, Brian A. Dempsey, William D. Burgos

Research output: Contribution to journalConference articlepeer-review


Dissimilatory metal reducing bacteria (DMRB) have been recognized for their role in metal transformations in pristine and contaminated environments. These organisms can directly and indirectly reduce numerous minerals, toxic heavy metals, and radionuclides and may also alter the stability of important ferric oxide/hydroxide passive films, thereby, influencing corrosion cells. Direct biological reduction/dissolution of ferric iron-containing passive films may represent a mechanism of microbiologically influenced corrosion (MIC) that is unique to DMRB. The factors that influence mineral dissolution may therefore be important in understanding and minimizing this form of MIC. A thermodynamic evaluation of hematite bioreduction suggests that hematite films may not be as stable as predicted based upon accepted thermodynamic data. Known biogeochemical and environmental reactions are examined herein for their potential role in promoting or possibly preventing corrosion.

Original languageEnglish (US)
JournalNACE - International Corrosion Conference Series
StatePublished - 2003
EventCorrosion 2003 - San Diego, United States
Duration: Apr 16 2003Apr 20 2003

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)


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