Biodegradation of the nitroaromatic herbicide dinoseb (2-sec-butyl-4,6-dinitrophenol) under reducing conditions |
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| Authors: | Russell H Kaake Don L Crawford Ronald L Crawford |
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| Institution: | (1) Department of Microbiology, Molecular Biology, and Biochemistry, and The Center for Hazardous Waste Remediation Research, University of Idaho, 83844 Moscow, Idaho, USA;(2) Present address: Research & Development, J.R. Simplot Company, 83204 Pocatello, Idaho, USA |
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| Abstract: | The degradation pathway for dinoseb (2-sec-butyl-4,6-dinitrophenol) under reducing conditions was investigated. Cultures were inoculated with a dinoseb-degrading anaerobic enrichment culture used in field studies. Biotransformation intermediates were extracted with ethyl acetate and analyzed by high pressure liquid chromatography, gas chromatography, and mass spectrometry. Dinoseb degradation involves reduction of the nitro groups to amino groups followed by replacement with hydroxyl groups. Depending on the pH and redox potential in the culture, these intermediates may exist as quinones or hydroquinones.Publication No. 94506 of the Idaho Agricultural Experiment Station |
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| Keywords: | nitroaromatics dinoseb anaerobic degradation biodegradation herbicide quinones |
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