Organochlorine Pesticide Residues in Sediment Cores of Sunderban Wetland, Northeastern Part of Bay of Bengal, India, and Their Ecotoxicological Significance |
| |
Authors: | S K Sarkar A Binelli C Riva M Parolini M Chatterjee A K Bhattacharya B D Bhattacharya K K Satpathy |
| |
Institution: | (1) Department of Marine Science, University of Calcutta, 35 Ballygunge Circular Road, Calcutta, 700019, India;(2) Department of Biology, University of Milan, Via Celoria 26, 20133 Milan, Italy;(3) Indira Gandhi Center for Atomic Research, Environmental and Industrial Safety Section, Safety Group, Kalpakkam, 603102, Tamil Nadu, India |
| |
Abstract: | 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 prevailing sequence of DDT metabolites indicates an active degradation of
the parent compound in the sediments and/or inputs of already degraded pp’DDT to the region. Peak concentrations of HCH isomers
and DDT metabolites have the potential to induce ecotoxicological impact as per the sediment quality guidelines. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|