Significance of black carbon in the sediment–water partitioning of organochlorine pesticides (OCPs) in the Indus River, Pakistan

Ali, Usman and Bajwa, Anam and Chaudhry, Muhammad Jamshed Iqbal and Mahmood, Adeel and Syed, Jabir Hussain and Li, Jun and Zhang, Gan and Jones, Kevin Christopher and Malik, Riffat Naseem (2016) Significance of black carbon in the sediment–water partitioning of organochlorine pesticides (OCPs) in the Indus River, Pakistan. Ecotoxicology and Environmental Safety, 126. pp. 177-185. ISSN 0147-6513

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Abstract

This study was conducted with the aim of assessing the levels and black carbon mediated sediment–water partitioning of organochlorine pesticides (OCPs) from the Indus River. ∑OCPs ranged between 52−285 ng L−1 and 5.6–29.2 ng g−1 in water and sediment samples respectively. However, the ranges of sedimentary fraction of total organic carbon (fTOC) and black carbon (fBC) were 0.82–2.26% and 0.04–0.5% respectively. Spatially, OCPs concentrations were higher at upstream sites as compared to downstream sites. Source diagnostic ratios indicated the technical usage of HCH (α-HCH/γ-HCH>4) and significant presence of DDT metabolites with fresh inputs into the Indus River as indicated by the ratios of (DDE+DDD)/∑DDTs (0.27–0.96). The partitioning of OCPs between the sediments and water can be explained by two carbon Freundlich adsorption model which included both organic carbon and black carbon pools as partitioning media.

Item Type: Journal Article
Journal or Publication Title: Ecotoxicology and Environmental Safety
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2300/2307
Subjects:
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 78584
Deposited By: ep_importer_pure
Deposited On: 15 Aug 2016 12:54
Refereed?: Yes
Published?: Published
Last Modified: 07 Jan 2020 04:47
URI: https://eprints.lancs.ac.uk/id/eprint/78584

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