Record Display for the EPA National Library Catalog
RECORD NUMBER: 13 OF 79| Main Title | Biodegradation of Monoaromatic Hydrocarbons by Aquifer Microorganisms Using Oxygen, Nitrate, or Nitrous Oxide as the Terminal Electron Acceptor. | |||||||||||
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| Author | Hutchins, S. R. ; | |||||||||||
| CORP Author | Robert S. Kerr Environmental Research Lab., Ada, OK. | |||||||||||
| Publisher | c1991 | |||||||||||
| Year Published | 1991 | |||||||||||
| Report Number | EPA/600/J-91/251; | |||||||||||
| Stock Number | PB92-110543 | |||||||||||
| Additional Subjects | Biological treatment ; Water pollution control ; Aquifers ; Microbial degradation ; Electron acceptors ; Anaerobic processes ; Benzene ; Nitrates ; Denitrification ; Oxygenation ; Aerobic proceses ; Microorganisms ; Toluene ; Xylenes ; Aromatic compounds ; Nitrogen oxide(N2O) ; Oil pollution control ; Reprints ; Benzene/ethyl | |||||||||||
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| Collation | 8p | |||||||||||
| Abstract | Microcosms were prepared from aquifer material, spiked with monoaromatic hydrocarbons, and amended with oxygen, nitrate, and nitrous oxide. Benzene and alkylbenzenes were degraded to concentrations below 5 microgram/liter within 7 days under anaerobic conditions, whereas only the alkylbenzenes were degraded when either nitrate or nitrous oxide was used. With limited oxygen, monoaromatic hydrocarbons were degraded but removal ceased once oxygen was consumed. However, when nitrate was also present, biodegradation of alkylbenzenes continued with no apparent lag. Although benzene was still recalcitrant, levels were reduced compared with levels after treatment with nitrate or limited oxygen alone. (Copyright (c) 1991, American Society for Microbiology.) |