Concentrations and patterns of organochlorines (OCs) in various fish species from the Indus River, Pakistan: A human health risk assessment

The present study was conducted to reveal the concentrations and patterns of organochlorines [i.e., organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs)] in freshwater fish species collected from four ecologically important sites of the Indus River i.e., Taunsa (TAU), Rahim Yar Khan...

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Bibliographic Details
Published in:Science of The Total Environment
Main Authors: Robinson, Timmer, Ali, Usman, Mahmood, Adeel, Chaudhry, Muhammad Jamshed Iqbal, Li, Jun, Zhang, Gan, Jones, Kevin C., Malik, Riffat Naseem
Format: Report
Language:English
Published: ELSEVIER SCIENCE BV 2016
Subjects:
Environmental Sciences & Ecology
Organochlorines
Organochlorine pesticides
Polychlorinated biphenyls
Fish
Indus River
Pakistan
Risk assessment
Environmental Sciences
POLYCHLORINATED-BIPHENYLS PCBS
PERSISTENT ORGANIC POLLUTANTS
POLYBROMINATED DIPHENYL ETHERS
FRESH-WATER FISH
BROMINATED FLAME RETARDANTS
EEL ANGUILLA-ANGUILLA
SOIL EXCHANGE FLUXES
PESTICIDES OCPS
PUNJAB PROVINCE
BLACK CARBON
Yar
Anguilla anguilla
Online Access:http://ir.gig.ac.cn/handle/344008/54440
https://doi.org/10.1016/j.scitotenv.2015.10.002
Description
Summary:The present study was conducted to reveal the concentrations and patterns of organochlorines [i.e., organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs)] in freshwater fish species collected from four ecologically important sites of the Indus River i.e., Taunsa (TAU), Rahim Yar Khan (RYK), Guddu (GUD) and Sukkur (SUK). In the fish muscle tissues, concentrations of 15 OCPs (Sigma(15)OCPs) and 29 PCBs (Sigma(29)PCBs) varied between 1.93-61.9 and 0.81-44.2 ng/g wet weight (ww), respectively. Overall, the rank order of OCs was DDTs > PCBs > hexachlorocyclohexanes (HCHs) > chlordanes (CHLs). The patterns of PCBs showed maximum contribution of tri-CBs (59%). Ratios of individual HCH and DDT analytes contributing to the summed values indicated both recent and past use of these chemicals in the region, depending upon fish species. To assess the associated health risks, carcinogenic and non-carcinogenic risks were calculated through hazard ratios (HRs). For carcinogenic risk, HR was >1 at both 50th and 95th percentile concentrations, suggesting that the daily exposure to OCPs and PCBs yields a lifetime cancer risk of 1 in amillion. HR for non-cancerous riskwas <1 at both the percentiles, signifying no adverse effect by OCs exposure in native population. (C) 2015 Elsevier B.V. All rights reserved.

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