Risk Assessment of Organic Pesticides Pollution in Surface Water of Hangzhou |
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| Authors: | Q Sun L Zhu M Dong |
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| Institution: | (1) Environment and Resource Department of Zhejiang University, Hangzhou, 310028, China;(2) Hangzhou Supervision Station, National Water Quality Supervision Network of City Water Supply System, Hangzhou, 310014, China |
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| Abstract: | Advances in research on pollution of organic pesticides (OPs) in surface water, pollution survey and risk assessments of organochlorine
pesticides (OCPs) and organophosphorus pesticides (OPPs) of surface water in Hangzhou are conducted. Total concentrations
of dichloro-diphenyl-trichloroethane (DDT) and hexachloride-benzene (HCH) in surface water were observed to be 0–0.270 μg/L
and 0–0.00625 μg/L respectively. DDE, as a metabolite of DDT and many species of OPPS were determined in some samples of surface water. Parathion, the main pollutant among OPPs in surface water of Hangzhou,
was observed to be 0–0.445 μg/L. Based on these experimental results, health risk assessments on the organic pollution are
developed. It is observed that the total risk “R
T” at present time of surface water in Hangzhou is mainly contributed by organophosphorus pesticides, especially Parathion;
HCH and DDT are not the main contaminants; on the contrary, organophosphorous pesticides, especially Parathion, must be of
concern at the present time. |
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| Keywords: | organic pesticides pollution risk assessment surface water survey |
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