Toxic Substances Hydrology Program
Electron Donor - "The compound that donates electrons (and therefore is oxidized). In bioremediation the organic contaminant often serves as an electron donor." - National Research Council, 1993
Electron Donor - "A chemical entity that donates electrons to another compound. It is an oxidizing agent that, by virtue of its accepting electrons, is itself reduced in the process." - U.S. Environmental Protection Agency, 2009
Electron Donor - "Suitable electron donors (such as organic compounds) together with electron acceptors (such as O2, nitrate, ferric iron, sulfate, CO2, or certain types of simple organic compounds) are required for the generation of energy. N [nitrogen], P [phosphorus], and S [sulfur] sources may be organic or inorganic, with some microorganisms able to use either while others are more restricted." - Pankow and Cherry, 1996
Electron Donor - "Redox reactions involve the transfer of electrons from a donor molecule to an acceptor molecule. The electron donor (D) loses n electrons and is oxidized: D=Dn++ne-. The electron acceptor (A) gains the n electrons and is reduced: A+ne-=An-. The term redox is short-hand for reduction and oxidation. It underscores that reduction of an acceptor and oxidation of a donor always occur together so that all electrons leaving the donor are taken up by the acceptor: D+A=Dn++An-." - National Reseach Council, 1993
Text in brackets ("[text]") are added by the editor.
USGS Information on Biodegradation
Other Information on Biodegradation
National Research Council, 1993, In situ bioremediation--When does it work?: Washington, D.C., National Academies Press, 224 p.
Pankow, J.F., and Cherry, J.A., 1996, Dense chlorinated solvents and other DNAPLs in groundwater--History, behavior, and remediation: Portland, Oregon, Waterloo Press, 522 p.
U.S. Environmental Protection Agency, 2009, Glossary of technical terms: U.S. Environmental Protection Agency, access date June 7, 2011.