Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 25, Issue 25, Pages 24653-24667Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-018-1940-3
Keywords
Freundlich two-carbon model; Sediment-water partitioning; OCPs; PCBs; Lesser Himalaya; Black carbon
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Funding
- Higher Education Commission, Pakistan under National Research Program for Universities [20-4730/RD/HEC/14/1188]
- Higher Education Commission of Pakistan
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This study was designed to monitor organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in riverine water of Lesser Himalaya along the altitude. Further, the sediment-water partitioning employing organic carbon and black carbon models were assessed. Results revealed higher water levels of organochlorine pesticides (0.07-41.4 ng L-1) and polychlorinated biphenyls (0.671-84.5 ng L-1) in Lesser Himalayan Region (LHR) of Pakistan. Spatially, elevated levels were observed in the altitudinal zone (737-975 masl) which is influenced by anthropogenic and industrial activities. Sediment-water partitioning of OCPs and PCBs were deduced using field data by employing one-carbon (f(OC) K-OC) and two-carbon Freundlich models (f(OC)K(OC) + f(BC)K(BC)C(W)(nF-1)). Results suggested improved measured vs predicted model concentrations when black carbon was induced in the model and suggested adsorption to be the dominant mechanism in phase partitioning of organochlorines in LHR.
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