Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Significance of black carbon in the sediment–water partitioning of organochlorine pesticides (OCPs) in the Indus River, Pakistan
AU - Ali, Usman
AU - Bajwa, Anam
AU - Chaudhry, Muhammad Jamshed Iqbal
AU - Mahmood, Adeel
AU - Syed, Jabir Hussain
AU - Li, Jun
AU - Zhang, Gan
AU - Jones, Kevin Christopher
AU - Malik, Riffat Naseem
PY - 2016/4
Y1 - 2016/4
N2 - 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.
AB - 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.
KW - Black carbon
KW - Two carbon Freundlich model
KW - OCPs
KW - Adsorption
KW - Sediment–water partitioning
KW - Indus River
U2 - 10.1016/j.ecoenv.2015.12.024
DO - 10.1016/j.ecoenv.2015.12.024
M3 - Journal article
VL - 126
SP - 177
EP - 185
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
SN - 0147-6513
ER -