Journal
FEMS MICROBIOLOGY ECOLOGY
Volume 49, Issue 1, Pages 129-135Publisher
OXFORD UNIV PRESS
DOI: 10.1016/j.femsec.2003.08.015
Keywords
bioremediation; methanogenesis; subsurface microbiology; sulfate reduction; aquifer; hydrocarbons; anaerobic biodegradation; gasoline; gas condensate
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The biodegradation of alicyclic compounds was studied under methanogenic and sulfate-reducing conditions in samples from a gas condensate-contaminated aquifer amended with whole gasoline. Aquifer microorganisms exhibited previously unrecognized anaerobic alicyclic hydrocarbon metabolism of a broad range of substrates at relatively rapid rates. Simple unsubstituted, methyl-substituted, and ethyl-substituted cyclopentenes, cyclopentanes and cyclohexanes were consumed without a substantial lag in the presence of sulfate, but rather less effectively under methanogenic conditions. Dimethyl-substituted cyclopentanes and cyclohexanes were biodegraded only in the presence of sulfate and a limited isomer-specific biodegradative pattern was seen. These results extend the range of hydrocarbons known to be susceptible to anaerobic decay and help indicate the patterns of alicyclic hydrocarbon biodegradation that can be expected (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.
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