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Nitroaromatic compounds serve as nitrogen source for Desulfovibrio sp. (B strain)
1Department of Biological Sciences, University of Notre Dame, IN 46556.
Canadian Journal of Microbiology
|April 1, 1993
Summary
A newly identified Desulfovibrio bacterium strain effectively transforms nitroaromatic compounds, using them as nitrogen sources and electron acceptors. This bacterium shows potential for bioremediation of contaminated environments.
Area of Science:
- Microbiology
- Environmental Science
- Biotechnology
Background:
- Nitroaromatic compounds are common environmental pollutants.
- Bioremediation strategies are needed for their removal.
Purpose of the Study:
- To investigate the potential of Desulfovibrio sp. (B strain) for nitroaromatic compound transformation.
- To understand the metabolic pathways involved in nitroaromatic utilization by this bacterium.
Main Methods:
- Isolation of Desulfovibrio sp. (B strain) from an anaerobic digester.
- Cultivation of the bacterium using nitroaromatic compounds as sole nitrogen sources and electron acceptors.
- Analysis of nitroaromatic compound transformation and ammonia production.
Main Results:
- Desulfovibrio sp. (B strain) utilized 2,4-dinitrophenol, 2,4-dinitrotoluene, and 2,6-dinitrotoluene as nitrogen sources and electron acceptors.
- Over 60% of nitroaromatics were transformed within 6 days.
- Nitro groups were reduced and deaminated to ammonia, leaving the aromatic ring intact.
- Aniline was used as a nitrogen source but not as an electron acceptor.
Conclusions:
- Desulfovibrio sp. (B strain) can transform nitroaromatic compounds, offering a potential bioremediation tool.
- The bacterium's ability to utilize nitroaromatics as nitrogen sources and electron acceptors is significant for anaerobic degradation.
- Further research in syntrophic systems may enhance complete nitroaromatic degradation in contaminated environments.