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Appl Environ Microbiol. 1993 December; 59(12): 4350-4353
Copyright © 1993, American Society for Microbiology. All Rights Reserved.

Abiotic Reduction of 4-Chloronitrobenzene to 4-Chloroaniline in a Dissimilatory Iron-Reducing Enrichment Culture

Cornelis G. Heijman, Christof Holliger*, Martin A. Glaus{dagger}, René P. Schwarzenbach and Josef Zeyer{ddagger}

Limnological Research Center, Swiss Federal Institute for Environmental Science and Technology (EAWAG), 6047 Kastanienbaum, Switzerland

ABSTRACT

4-chloronitrobenzene (4-Cl-NB) was rapidly reduced to 4-chloroaniline with half-lives of minutes in a dissimilatory Fe(III)-reducing enrichment culture. The initial pseudo-first-order rate constants at 25°C ranged from 0.11 to 0.19 per minute. The linear Arrhenius correlation in a temperature range of 6 to 85°C and the unchanged reactivity after pasteurization indicated that the nitroreduction occurred abiotically. A fine-grained black solid which was identified as poorly crystalline magnetite (Fe3O4) by X-ray diffraction accumulated in the enrichments. Magnetite produced by the Fe(III)-reducing bacterium Geobacter metallireducens GS-15 and synthetic magnetite also reduced 4-Cl-NB. These results suggest that the reduction of 4-Cl-NB by the enrichment material was a surface-mediated reaction by dissimilatory formed Fe(II) associated with magnetite.

FOOTNOTES

* Corresponding author.

{dagger} Present address: Paul Scherrer Institute, CH-5232 Villigen, Switzerland.

{ddagger} Present address: Swiss Federal Institute of Technology, Zürich, Institute of Terrestrial Ecology, CH-8952 Schlieren, Switzerland.

Appl Environ Microbiol. 1993 December; 59(12): 4350-4353
Copyright © 1993, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

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  • Katsivela, E., Wray, V., Pieper, D. H., Wittich, R.-M. (1999). Initial Reactions in the Biodegradation of 1-Chloro-4-Nitrobenzene by a Newly Isolated Bacterium, Strain LW1. Appl. Environ. Microbiol. 65: 1405-1412 [Abstract] [Full Text]  


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