贵阳某农村饮用水源地水环境健康风险评价

doi:10.11934/j.issn.1673-4831.2017.05.003

Abstract

Abstract:

Based on the water quality monitoring data of of a village in Guiyang, covering 13 hazardous pollutants, including Cr⁶⁺, As and Cd, tentative environmental health risk assessment was carried out of the water body at the water head site of the region, using the USEPA health risk assessment model. Results show that the health risk of the villagers exposed to the carcinogenic substance in the water body through drinking water was rated in the range from 10^-7 to 10^-4. Cr⁶⁺ was the major contributor to the risk, varying in the range of 7.2×10^-5~3.7×10^-4 a^-1, all significantly higher than the maximum acceptable levels specified by ICRP and USEPA as 5.0×10^-5 a^-1 and 1.0×10^-6 a^-1, respectively. The non-carcinogenic risks of the water body through drinking water ranged from 10^-11 to 10^-8, much lower than the maximum levels specified by ICRP and USEPA. The risk caused by the carcinogens in the drinking water was about 1 000 times as high as that of the non-carcinogens, contributing 99.9% of the total risk. So that, the issue of Cr⁶⁺ in the drinking water should arouse the attention of relevant departments, and deserves the first priority for management.

Key words: rural drinking water resource, water quality investigation, health risk assessment, Guiyang

CLC Number:

X820

CHEN Sheng-ke, WAN Yu, YANG Ming-jiao, GAN Xiu-hai. Environmental Health Risk Assessment of Drinking Water Resource of a Village in Guiyang[J]. Journal of Ecology and Rural Environment, 2017, 33(5): 403-408.

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Environmental Health Risk Assessment of Drinking Water Resource of a Village in Guiyang

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