Complete dechlorination of DDE/DDD using magnesium/palladium system
DSpace at IIT Bombay
View Archive InfoField | Value | |
Title |
Complete dechlorination of DDE/DDD using magnesium/palladium system
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Creator |
GAUTAM, SK
SURESH, S |
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Subject |
marine-environment
in-vitro ddt degradation iron 1,1-dichloro-2,2 bis (4,-chlorophenyl) ethane 1,1-dichloro-2,2 bis (4,-chlorophenyl) ethylene dechlorination diphenylethane magnesium palladium zerovalent |
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Description |
Kinetic studies on the dechlorination of 1,1-dichloro-2,2 bis (4,-chlorophenyl) ethane (DDD) and 1,1,dichloro-2,2 bis (4,-chlorophenyl) ethylene (DDE) in 0.05% biosurfactant revealed that the reaction follows second-order kinetics. The rate of reaction was dependent on the presence of acid, initial concentrations of the target compound, and zerovalent magnesium/tetravalent palladium. Gas chromatography-mass spectrometry analyses of DDE dechlorination revealed the formation of a completely dechlorinated hydrocarbon skeleton, with diphenylethane as the end product, thereby implying the removal of all four chlorine atoms of DDE. In the case of DDD, we identified two partially dechlorinated intermediates [namely, 1, 1-dichloro-2, 2 bis (phenyl) ethane and 1, chloro-2, 2 bis (phenyl) ethane] and diphenylethane as the end product. On the basis of products formed from DDD dehalogenation, we propose the removal of aryl chlorine atoms as a first step. Our investigation reveals that biosurfactant may be an attractive solubilizing agent for DDT and its residues. The magnesium/palladium system is a promising option because of its high reactivity and ability to achieve complete dechlorination of DDE and DDD.
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Publisher |
WATER ENVIRONMENT FEDERATION
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Date |
2011-09-01T10:15:41Z
2011-12-26T12:59:36Z 2011-12-27T05:52:05Z 2011-09-01T10:15:41Z 2011-12-26T12:59:36Z 2011-12-27T05:52:05Z 2007 |
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Type |
Article
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Identifier |
WATER ENVIRONMENT RESEARCH, 79(4), 430-435
1061-4303 http://dx.doi.org/10.2175/106143006X115336 http://dspace.library.iitb.ac.in/xmlui/handle/10054/12747 http://hdl.handle.net/10054/12747 |
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Language |
en
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