Pesticide residues in the sediments from the lakes of Schirmacher Oasis, Antarctica
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 o...
| Published in: | Polar Record |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Cambridge University Press (CUP)
1994
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s003224740002101x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003224740002101X |
| Summary: | 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. |
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