Organochlorine pesticide residues in sediment cores of Sunderban wetland, Northeastern part of Bay of Bengal, India, and their ecotoxicological significance
- S. K. Sarkar
- M. Chatterjee
- A. K. Bhattacharya
- B. D. Bhattacharya
- K. K. Satpathy
- A.P. Binelli
- C. Riva
- M. Parolini
DOIAbstract
This paper presents the first comprehensive report of the organochlorine pesticide residues (OCs) such as hexachlorocyclohexane isomers (HCHs), dichlorodiphenyltrichloroethane and its six metabolites (DDTs), and hexachlorobenzene (HCB) in core sediments (<63-μm particle size) from the Indian Sunderban wetland. The pooled mean values of the mass fraction of ΣHCHs, HCB, and ΣDDTs in the sediments were 0.05–12, 0.05–1.4, and 0.05–11.5 ng g−1 dry weight, respectively. The vertical distribution of pesticides reveals an erratic pattern. The concentration of four isomers of HCHs reveals a heterogenic distribution where γ-HCH (lindane) and β-HCH shared the dominant part. The mass fraction of HCB did not show any sharp spatial variation. The prevail...
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