Biodegradation of cresol isomers in anoxic aquifers
Journal Article
·
· Appl. Environ. Microbiol.; (United States)
OSTI ID:6514345
The biodegradation of o-, m-, and p-cresol was examined in material obtained from a shallow anaerobic alluvial sand aquifer. The cresol isomers wer 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. Biodegradations 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 this 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 methanogenesis 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. Simultaneous adaptation studies in combination with spectrophotometric and chromatographic analysis of metabolites indicated that p-cresol was oxidized under SRC to p-hydroxybenzoate via the corresponding alcohol and aldehyde. This series of reactions was inhibited under sulfate-limited or aerobic conditions. Therefore, the primary catabolic event for p-cresol decomposition under SRC appears to involve the hydroxylation of the aryl methyl group.
- Research Organization:
- Univ. of Oklahoma, Norman
- OSTI ID:
- 6514345
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 53:4; ISSN AEMID
- Country of Publication:
- United States
- Language:
- English
Similar Records
Anaerobic degradation of m-cresol in anoxic aquifer slurries: Carboxylation reactions in a sulfate-reducing bacterial enrichment
Anaerobic biodegradation of o-, m- and p-cresol by sulfate-reducing bacterial enrichment cultures obtained from a shallow anoxic aquifer
Influence of alternate electron acceptors on the metabolic fate of hydroxybenzoate isomers in anoxic aquifer slurries
Journal Article
·
Sat Jun 01 00:00:00 EDT 1991
· Applied and Environmental Microbiology; (United States)
·
OSTI ID:5272719
Anaerobic biodegradation of o-, m- and p-cresol by sulfate-reducing bacterial enrichment cultures obtained from a shallow anoxic aquifer
Technical Report
·
Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:7104447
Influence of alternate electron acceptors on the metabolic fate of hydroxybenzoate isomers in anoxic aquifer slurries
Journal Article
·
Tue Feb 28 23:00:00 EST 1989
· Applied and Environmental Microbiology; (USA)
·
OSTI ID:5103397
Related Subjects
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANAEROBIC CONDITIONS
AQUIFERS
AROMATICS
BIODEGRADATION
CHEMICAL REACTIONS
CHROMATOGRAPHY
CONTAMINATION
CRESOLS
DECOMPOSITION
HYDROXY COMPOUNDS
ISOMERS
METABOLISM
METABOLITES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
SEPARATION PROCESSES
SPECTROPHOTOMETRY
SULFATES
SULFUR COMPOUNDS
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANAEROBIC CONDITIONS
AQUIFERS
AROMATICS
BIODEGRADATION
CHEMICAL REACTIONS
CHROMATOGRAPHY
CONTAMINATION
CRESOLS
DECOMPOSITION
HYDROXY COMPOUNDS
ISOMERS
METABOLISM
METABOLITES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
SEPARATION PROCESSES
SPECTROPHOTOMETRY
SULFATES
SULFUR COMPOUNDS