The Typical Organic Pollutants Health Risk Research Of The Main Source Water In Yellow River Basin

Although the contamination of the organic pollutants had been reported to occur in the Yellow River basin, few studies had been done on the source water contamination and health risk of Yellow River basin. To understand the typical organic pollutant contamination status of the main source water in Yellow River basin, samples were collected from fifty source water points (including reservoir and river) in Yellow River basin. The samples were analyzed for the representative organic pollutants, including Benzene homology, Chlorobenzene compounds, organophosphorous pesticides, and Nitrobenzene compounds, total 17 compounds. It was observed that the concentrations of the 17 compounds in the fifty source waters were all less than the standard limit of Chinese surface water quality standard. In addition, the benzene, toluene, nitrobenzene, p-nitrochlorobenzene, 2,4-dinitrotoluene and 2,4-dinitrochlorobenzene, dichlorvos, demeton, dimethoate methyl parathion, malathion and parathion were more frequently detected in the main source water of Yellow River basin, especially the organophosphorous pesticides, the detection rates of dichlorvos, demeton, methyl parathion, malathion and parathion are all much higher than 90% in the fifty source water points. The results of detection rate of target compounds suggested that the organic pollution had been popular in the source water of the Yellow River basin. The health risk assessment results suggested that the noncarcinogenic risk HQ values of the target compounds were less than one, and the cancer risk values of most source water sites were much less than the 1´10-6, only the sites 23,24,25,26 cancer risk values were much higher than the 1´10-6, which indicated that the heath risk produced by the target compounds in the most source water was in a acceptable level