Record Display for the EPA National Library Catalog

RECORD NUMBER: 151 OF 1515

OLS Field Name OLS Field Data
Main Title Biodegradation of Cresol Isomers in Anoxic Aquifers.
Author Smolenski, W. J. ; Suflita, J. M. ;
CORP Author Oklahoma Univ., Norman. Dept. of Botany and Microbiology.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Year Published 1987
Report Number EPA-R-811146 ;EPA-R-812808; EPA/600/J-87/131;
Stock Number PB88-149125
Additional Subjects Biodeterioration ; Cresols ; Isomerization ; Aquifers ; Anaerobic conditions ; Slurries ; Substrates ; Sands ; Sludge ; Ground water ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB88-149125 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 10p
Abstract
The biodegradation of 0-, m-, and p-cresol was examined in material obtained from a shallow anaerobic alluvial sand aquifer. The cresol isomers were preferentially metabolized, with p-cresol being the most easily degraded. m-Cresol was more persistent than the para-isomer, and o-cresol persisted for over 90 days. Biodegradation of cresol isomers was favored under sulfate-reducing conditions (SRC) compared with that under methanogenic conditions (MC). Slurries that were acclimated to p-cresol metabolism transformed the substrate at 18 and 330 nmol/h per g (dry weight) for MC and SRC, respectively. Inhibition of electron flow to sulfate reduction with 2.0 mM molybdate reduced p-cresol metabolism in incubations containing sulfate. When methanolgenesis was blocked with 5 mM bromoethanesulfonic acid in incubations lacking sulfate, p-cresol catabolism was retarded. Under SRC 3.4 mol of sulfate was consumed per mol of p-cresol metabolized. The addition of sulfate to methanogenic incubations stimulated p-cresol degradation. (Copyright (c) American Society for Microbiology.)