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Dissimilatory metal reduction

D R Lovley1

  • 1US Geological Survey, Reston, Virginia 22092.

Annual Review of Microbiology
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

Microorganisms can transform metals like iron and manganese through enzymatic reduction, impacting geochemistry. This microbial metal reduction offers potential for environmental remediation of contaminants like uranium and selenium.

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Area of Science:

  • Environmental microbiology
  • Biogeochemistry
  • Microbial metabolism

Background:

  • Microorganisms mediate metal transformations independent of assimilation.
  • Dissimilatory metal reduction impacts geochemistry in anaerobic environments.
  • Microbial metal reduction influences contaminant fate and transport.

Purpose of the Study:

  • To explore microbial enzymatic metal reduction.
  • To understand the role of microbial metal reduction in geochemistry.
  • To identify potential bioremediation applications.

Main Methods:

  • Literature review of microbial metal reduction processes.
  • Analysis of microbial roles in inorganic and organic geochemistry.
  • Assessment of bioremediation potential for metal contaminants.

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Main Results:

  • Microorganisms conserve energy via reduction of Fe(III) and Mn(IV).
  • Microbial reduction of U(VI), Se(VI), Cr(VI), and Hg(II) has environmental implications.
  • Potential for bioremediation of uranium and selenium contamination exists.

Conclusions:

  • Microbial metal reduction is a key biogeochemical process.
  • Enzymatic reduction of metals like chromium and mercury affects their environmental fate.
  • Microbial metal reduction presents promising strategies for environmental remediation.