Water quality risk assessment in Guxian Reservoir water source

doi:10.11924/j.issn.1000-6850.casb18090065

Abstract

Abstract: To control water environmental ecology and ensure the safety of water source, we assessed the individual health hazard risk of genetic toxic and body toxic substances by applying the health risk assessment model based on measured data of water quality in Guxian reservoir. The results showed that: (1) the annual individual health hazard risk of all kinds of pollutants was 4.24×10-5 from 2009 to 2015 in the reservoir, which was lower than the maximum acceptable annual value of 5.0 × 10- 5/a recommended by the International Radiation Protection Committee, but higher than the risk value of 1.0 × 10- 5/a suggested by Sweden and Netherlands; (2) through drinking water, the risk value of carcinogenic substances to human health hazards was: Cr>As>Cd, and the risk value of non-carcinogenic substances was: F->Cu>Pb>Hg>NH3-N>CN->Se>Zn> phenol; the risk of carcinogens was more dangerous to the human body than that of non-carcinogens. It is necessary to strengthen soil and water conservation work, strictly prevent agricultural non- point sources pollution, promote scientific breeding, to ensure the safety of drinking water.

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