Abstract
Residue levels, distribution patterns and ecological risk assessment of OCPs in water and sediment samples collected from two upstream feeding tributaries of the River Chenab, Pakistan were monitored. ΣOCPs levels in water and sediment ranged between 8 and 76 ng L−1 and 17 and 224 ng g−1, respectively. The mean concentration of ΣHCH (hexachlorocyclohexane) was 3.3 ± 3.2 ng L−1 and 8.4 ± 9 ng g−1 for water and sediment samples, respectively, while ΣDDT (dichlorodiphenyltrichloroethane) exhibited the average concentration of 9.07 ± 6.15 ng L−1 and 40.3 ± 26.2 ng g−1 for water and sediment samples, respectively. The concentration of DDT and HCHs in both water and sediment samples were about 80 % of total OCPs and DDTs were the predominant organochlorines in the investigated matrix. DDTs and HCHs in sediment samples posed higher ecotoxicological risk and results were significant when compared with the quality guidelines. Results of the present study should be taken seriously by higher authorities as there is a serious threat to ecological integrities by OCPs exposure.
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Acknowledgments
Authors would like to acknowledge the Higher Education Commission of Pakistan (HEC) for providing support under the IRSIP (International Research Support Initiative Program). We also express our thanks to Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, China. We are highly thankful to Prof. Dr. Xiandong Li (Polytechnic University, Hong Kong) for providing assistance for samples transportation to Guangzhou Institute of Geochemistry, Guangzhou, China. Authors can never forget to acknowledge Mr. Irfan Ali Ch. who guided to collect samples from far areas during sampling.
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Mahmood, A., Malik, R.N., Li, J. et al. Levels, distribution pattern and ecological risk assessment of organochlorines pesticides (OCPs) in water and sediments from two tributaries of the Chenab River, Pakistan. Ecotoxicology 23, 1713–1721 (2014). https://doi.org/10.1007/s10646-014-1332-5
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DOI: https://doi.org/10.1007/s10646-014-1332-5