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Marine Organic MicropollutantsOrganochlorine Pesticide Residues (OCPs) in Sediment Cores from Sundarban Wetland

Marine Organic Micropollutants: Organochlorine Pesticide Residues (OCPs) in Sediment Cores from... [This chapter presents the 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 Sundarban 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.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Marine Organic MicropollutantsOrganochlorine Pesticide Residues (OCPs) in Sediment Cores from Sundarban Wetland

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Publisher
Springer International Publishing
Copyright
© Springer International Publishing Switzerland 2016
ISBN
978-3-319-43300-4
Pages
11 –30
DOI
10.1007/978-3-319-43301-1_2
Publisher site
See Chapter on Publisher Site

Abstract

[This chapter presents the 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 Sundarban 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.]

Published: Sep 15, 2016

Keywords: Organochlorine pesticides; Trace organics; Intertidal sediments; Ecotoxicological risk; Indian Sundarban; Tropical coast of India; Estuary

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