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Electrode-Reducing Microorganisms That Harvest Energy from Marine Sediments
Daniel R. Bond, Dawn E. Holmes, Leonard M. Tender and Derek R. Lovley
New Series, Vol. 295, No. 5554 (Jan. 18, 2002), pp. 483-485
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/3075867
Page Count: 3
You can always find the topics here!Topics: Electrodes, Electrons, Microorganisms, Sediments, Acetates, Anodes, Graphite, Ribosomal DNA, Energy, Electric current
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Energy in the form of electricity can be harvested from marine sediments by placing a graphite electrode (the anode) in the anoxic zone and connecting it to a graphite cathode in the overlying aerobic water. We report a specific enrichment of microorganisms of the family Geobacteraceae on energy-harvesting anodes, and we show that these microorganisms can conserve energy to support their growth by oxidizing organic compounds with an electrode serving as the sole electron acceptor. This finding not only provides a method for extracting energy from organic matter, but also suggests a strategy for promoting the bioremediation of organic contaminants in subsurface environments.
Science © 2002 American Association for the Advancement of Science