A Study of Al°, Zn°, Sn°, V°, Ti°, Co°, Cu°, Ni° or Fe° as Sole Electron Sources for Methanogenesis, and the Effects of Organotins on Methanogenic Bacteria

  • Negash Belay
  • Lacy Daniels


It was recently shown that elemental iron, either as pure iron or as mild steel, can be used in place of H2 as the sole electron donor for methanogenesis from CO2 (Daniels et al., 1987). Desulfovibrio has also been demonstrated to use some electrons from Fe° to reduce sulfate (Cord-Ruwisch and Widdel, 1986). Thermodynamically, the use of Fe° as an electron donor for both methanogenesis and sulfate reduction to sulfide is favorable, with ∆GO′ values of −136 and −152 kJ/mole product, respectively. It is thought that, due to electron consumption from the iron and due to sulfide production by both groups of organisms (Daniels et al., 1986), both methanogens and sulfate reducers can contribute to biocorrosion of ferrous metals. Other metals have now been examined here for their ability to donate electrons for methanogenesis.


Electron Donor Methane Production Elemental Metal Electron Source Methanogenic Bacterium 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Negash Belay
    • 1
  • Lacy Daniels
    • 1
  1. 1.Department of MicrobiologyUniversity of IowaIowa CityUSA

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