Isolation and characterization of a bacterium that mineralizes toluene in the absence of molecular oxygen |
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Authors: | J. Dolfing J. Zeyer P. Binder-Eicher R. P. Schwarzenbach |
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Affiliation: | (1) Swiss Federal Institute for Water Resources and Water Pollution Control (EAWAG/ETH), CH-6047 Kastanienbaum, Switzerland;(2) Present address: Department of Biochemistry, Groningen Biotechnology Center, University of Groningen, Nijenborgh 16, NL-9747 AG Groningen, The Netherlands |
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Abstract: | A bacterium tentatively identified as a Pseudomonas sp. was isolated from a laboratory aquifer column in which toluene was degraded under denitrifying conditions. The organism mineralized toluene in pure culture in the absence of molecular oxygen. In carbon balance studies using [ring-UL-14C]toluene, more than 50% of the radioactivity was recovered as 14CO2. Nitrate and nitrous oxide served as electron acceptors for toluene mineralization. The organism was also able to degrade m-xylene, benzoate, benzaldehyde, p-cresol, p-hydroxybenzaldehyde, p-hydroxybenzoate and cyclohexanecarboxylic acid in the absence of molecular oxygen. |
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Keywords: | Pseudomonas sp. Toluene Xylene Dimethylbenzene Aromatic compounds Denitrification Nitrate reduction Anaerobic degradation |
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