Levels,distribution pattern and ecological risk assessment of organochlorines pesticides (OCPs) in water and sediments from two tributaries of the Chenab River,Pakistan |
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Authors: | Adeel Mahmood Riffat Naseem Malik Jun Li Gan Zhang |
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Affiliation: | 1. Environmental Biology and Ecotoxicology Laboratory, Department of Plant Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan 2. Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan 3. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
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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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