Study On Risk Pollutants And Assessment Of Drinking Water Sources Gangnan Reservoir

The safety of urban water supply is related to the stable operation of urban social,economic and environmental systems.In order to ensure the water quality safety of drinking water sources and realize the comprehensive water quality early warning,it is an important task to carry out the risk assessment of water quality safety of urban drinking water sources.Through the methods of chemical screening and biotoxicity screening,this paper has formed a risk screening list and ecological health risk assessment report based on the characteristics of drinking water sources in Gangan reservoir,and selected pollutants for qualitative risk assessment.This paper evaluated and identified risk factors,determined the list and priority order of pollutants in drinking water sources in Gangan reservoir,and initially evaluated their risks to the ecological environment and human health.The results show that PPCPs?35 species?,pesticides?18 species?,polycyclic aromatic hydrocarbons?8 species?,phenols?16 species?,phthalates?5 species?,and VOCs?16?are detected at the sampling points.Estrogen receptor induction is detected in 7 of the11 sampling points.A total of 98 quantitatively detected pollutants,of which 32 were confirmed or suspected to have carcinogenic effects,41 have teratogenic effects,46 have mutagenic effects,24 confirmed or suspected have endocrine disrupting effects,and 30confirmed or suspected have reproductive developmental toxicity.The non-carcinogenic risk values of the pollutants are less than its threshold value of 1.The carcinogenic risk values are all below the order of 10^-6.Scientifically analyze the potential risks in drinking water sources,and ensure the safety of drinking water in Gangan reservoir.