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Complete dechlorination of DDE/DDD using magnesium/palladium system

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Title Complete dechlorination of DDE/DDD using magnesium/palladium system
 
Creator GAUTAM, SK
SURESH, S
 
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
 
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.
 
Publisher WATER ENVIRONMENT FEDERATION
 
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
 
Type Article
 
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
 
Language en