| Literature DB >> 26761782 |
Usman Ali1, Anam Bajwa1, Muhammad Jamshed Iqbal Chaudhry2, Adeel Mahmood3, Jabir Hussain Syed4, Jun Li4, Gan Zhang4, Kevin C Jones5, Riffat Naseem Malik6.
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 (f(TOC)) and black carbon (f(BC)) 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.Entities:
Keywords: Adsorption; Black carbon; Indus River; OCPs; Sediment–water partitioning; Two carbon Freundlich model
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Year: 2016 PMID： 26761782 DOI： 10.1016/j.ecoenv.2015.12.024
Source DB: PubMed Journal: Ecotoxicol Environ Saf ISSN： 0147-6513 Impact factor: 6.291