title: TBA biodegradation in surface-water sediments under aerobic and anaerobic conditions.
abstract: The potential for [U-14C] TBA biodegradation was examined in laboratory microcosms under a range of terminal electron accepting conditions. TBA mineralization to CO2 was substantial in surface-water sediments under oxic, denitrifying, or Mn(IV)-reducing conditions and statistically significant but low under SO4-reducing conditions. Thus, anaerobic TBA biodegradation may be a significant natural attenuation mechanism for TBA in the environment, and stimulation of in situ TBA bioremediation by addition of suitable terminal electron acceptors may be feasible. No degradation of [U-14C] TBA was observed under methanogenic or Fe(III)-reducing conditions.
authors.affiliation: U.S. Geological Survey, 720 Gracern Rd, Suite 129, Columbia, South Carolina 29210-7651, USA. pbradley@usgs.gov
authors.forename: Paul M
authors.initials: PM
authors.lastname: Bradley
authors.forename: James E
authors.initials: JE
authors.lastname: Landmeyer
authors.forename: Francis H
authors.initials: FH
authors.lastname: Chapelle
mesh_terms: D001420:Bacteria, Aerobic / Q000502:physiology; D001421:Bacteria, Anaerobic / Q000502:physiology; D001673:Biodegradation, Environmental; D019015:Geologic Sediments / Q000737:chemistry / Q000382:microbiology; D014873:Water Pollutants / Q000378:metabolism*; D020002:tert-Butyl Alcohol / Q000378:metabolism*
chemical_list: D014873:Water Pollutants; D020002:tert-Butyl Alcohol