Abstract：Objective To investigate the pollution status of 8 kinds of heavy metals in tap water from the Xiang, Zi, Yuan and Li River in Hunan Province so as to evaluate the health risk induced by the heavy metals. Methods We tested the concentration of arsenic (As), cadmium (Cd), hexavalent chromium (Cr6+), lead (Pb), mercury (Hg), selenium (Se), manganese (Mn) and zinc (Zn) in tap water from the Xiang, Zi, Yuan and Li River in Hunan Province in 2014, and then evaluated their health risk. Results The concentration of the 8 kinds of heavy metals in wet and dry seasons was both below the detection limits of national standards. Among the four rivers, only the carcinogenic risks of As and Cd in two seasons and Cr6+ in wet season in the Xiang River were all slightly higher than the acceptable limits, while the carcinogenic risk limits of the other heavy metals were all lower than 10-4. The combined carcinogenic risks of As, Cd, Cr6+ and Pb were 1.32×10-4 in wet season and 1.50×10-4 in dry season, which were both slightly higher than the limit (10-4). The single and combined non-carcinogenic risks of the 7 heavy metals (including As, Cd, Cr6+, Hg, Se, Mn and Zn) in wet and dry seasons in the Xiang, Zi, Yuan and Li River were all less than 1.The heavy- metal-induced non-carcinogenic and carcinogenic risks showed statistically significant differences between the two seasons as well as among the four river basins(both P<0.05). Conclusions The heavy- metal-induced combined pollution in tap water from the Xiang, Zi, Yuan and Li River in Hunan Province may pose health risks to local people; and hence, the relevant local health and environmental protection departments should pay special attention to the heavy-metal-induced pollution in the four rivers.
陈艳华, 王非, 黄涛, 胡冀, 陈培厚. 湖南省湘资沅澧四大流域管网末梢水中重金属的健康风险评价[J]. 实用预防医学, 2018, 25(2): 171-175.
CHEN Yan-hua, WANG Fei, HUANG Tao, HU Ji, CHEN Pei-hou. Health risk assessment of heavy metals in tap water from the Xiang, Zi, Yuan and Li River in Hunan Province. , 2018, 25(2): 171-175.
2018, Vol. 25 
