Comparative product analysis of carbon tetrachloride dehalogenation catalyzed by cobalt corrins in the presence of thiol or titanium (III) reducing agents
Article Abstract:
The role of the reductant in corrin-catalyzed reductive dehalogenation of CCI4 is examined in reaction systems containing a corrin, reductant and CCI4. Transformation products in both the headspae and soluble reaction mixture were determined. With titanium-(III)citrate as reductant, products were mostly hydrogenolytic and included predominantly CH3CI and CH4. Products in the presence of thiol reducing agents were highly halogenated and included CH2CI2 and CO. Formate was formed in the presence of dithiothreitol. Sulfide/cysteine reductants were least effective in promotig reductive dehalogenation.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Degradation of fluorescent whitening agents in sunlit natural waters
Article Abstract:
Stilbene-type fluorescent whitening agents commonly used in detergents and papers are degraded photochemically following a fast reversible photoisomerization. These compounds can be photochemically degraded in natural surface waters owing to their ability to absorb part of the terrestrial sunlight. Samples from a eutrophic Swiss lake water show that the photochemical degradation of distyryl biphenyl is three times faster in summer noon terrestrial sunlight at 25 degrees C compared with the diaminostilbene types DAS 1 and DAS2.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Cobalamin-enhanced anaerobic biotransformation of carbon tetrachloride
Article Abstract:
The biodegradation of carbon tetrachloride (CT) was examined by adding low levels of cobalamin to an anaerobic enrichment culture grown on dichloromethane as sole organic carbon and methane source. Adding cobalamin increased carbon dioxide, but decreased carbon disulfide in the culture. However, none of CT was reduced to chloroform.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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