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Main Title Microbial degradation of alkylbenzenes under sulfate-reducing and methanogenic conditions /
Author Beller, Harry R. ; Edwards, E. A. ; Grbic-Galic, D. ; Reinhard, M.
Other Authors
Author Title of a Work
Edwards, Elizabeth A.
Grbic-Galic, Dunja.
Reinhard, Martin.
Hutchins, Stephen R.
CORP Author Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory,
Year Published 1991
Report Number EPA/600/2-91/027; EPA-R-815721
Stock Number PB91-212324
OCLC Number 45745686
Subjects Organic compounds--Biodegradation.
Additional Subjects Microbial degradation ; Aromatic hydrocarbons ; Water pollution control ; Land pollution control ; Sulfate reducing bacteria ; Methanogenic bacteria ; Biocontrol ; Soil contamination ; Storage tanks ; Underground storage ; Anaerobic processes ; Fermentation ; Aquifers ; Environmental transport ; Biodeterioration ; Iron ; Toluene ; Benzenes ; Fuel storage
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EMBD  PB91-212324 NRMRL/GWERD Library/Ada,OK 04/30/2004
NTIS  PB91-212324 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 74 pages : illustrations ; 28 cm
Aquifer solids and soils obtained from various hydrocarbon-contaminated sites were used to investigate the ability of indigenous microorganisms to degrade monoaromatic hydrocarbons under strictly anaerobic conditions. In anaerobic microcosms inoculated with fuel-contaminated soil from the Patuxent River site, toluene degradation occurred concomitantly with sulfate reduction and ferric iron reduction. Similar results were obtained with suspended enrichments derived from the microcosms. Stoichiometric data and other observations suggested that sulfate reduction was closely linked to toluene degradation, whereas iron reduction was a secondary, potentially abiotic, reaction between ferric iron and biogenic hydrogen sulfide. The presence of millimolar concentrations of amorphous Fe(OH)3 in Patuxent River microcosms and enrichments either greatly facilitated the onset of toluene degradation or accelerated the rate once degradation had begun. Fermentative/methanogenic microcosms and enrichments that degraded toluene and o-xylene without added exogenous electron acceptors (except CO2) were developed from creosote-contaminated Pensacola samples. The microcosms initially underwent an acclimation lag of several months; however, once the degradation of aromatic hydrocarbons was initiated, it proceeded at a relatively rapid rate, and it was complete (resulting in mineralization to CO2 and CH4). Benzene, ethylbenzene, and p-xylene were not degraded.
"Stephen R. Hutchins, project officer." Cover title. "EPA/600/2-91/027." "Research and Development, Aug. 1991." Includes bibliographical references (page 8). Microfiche.