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Pesticide residues in the sediments from the lakes of Schirmacher Oasis, Antarctica

Published online by Cambridge University Press:  27 October 2009

A. Sarkar ,
S.Y.S. Singbal  and
S.P. Fondekar
A. Sarkar
Affiliation:
Chemical Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India
S.Y.S. Singbal
Affiliation:
Chemical Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India
S.P. Fondekar
Affiliation:
Chemical Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India
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Abstract

Concentration levels of various organochlorine pesticides and their derivatives — namely, hexachlorocyclohexanes (HCH) and the DDT compounds pp'-DDT, op'-DDT, pp'-DDE, op'-DDE, pp'-DDD, and op'-DDD — were determined in the sediments from eight different lakes of the Schirmacher Oasis, near Dakshin Gangotri, the Indian station (70° 45'S, 11° 44'E) during the Sixth Indian scientific expedition to Antarctica (December 1986 to February 1987). Concentration levels of HCHs (α, β, γ)and t-DDT (pp'-DDT + op'-DDT + pp'-DDE + op'-DDE + pp'-DDD + op'-DDD) in sediments of these lakes were found to be in the ranges of 37.7–155 pg/gand 512.9–1131 pg/g, respectively. Among the isomers of HCH, gamma-HCH was most prominent, followed by alpha-HCH, whereas in the case of metabolites of DDT and its isomers, pp'-DDT was found to be dominant over others. However, all the other compounds of the DDT family were present in considerable amounts in all the lakes. There was no significant change in the monthly variation of the concentration levels of HCHs and DDTs in the lakes.

Type
Articles
Information
Polar Record , Volume 30 , Issue 172 , January 1994 , pp. 33 - 38
Copyright
Copyright © Cambridge University Press 1994

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