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Main Title Biodegradation of Monoaromatic Hydrocarbons by Aquifer Microorganisms Using Oxygen, Nitrate, or Nitrous Oxide as the Terminal Electron Acceptor.
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
Library Call Number Additional Info Location Last
NTIS  PB92-110543 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
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.)