Journal of Shandong University (Health Sciences) ›› 2021, Vol. 59 ›› Issue (12): 24-32.doi: 10.6040/j.issn.1671-7554.0.2021.0988

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Concentration changes and health risk of 8 heavy metals in drinking water in Jinan from 2016 to 2020

PENG Xiumiao, WANG Xuefeng, GONG Weimei, ZHANG Yang, ZHOU Jingwen, CUI Liangliang   

  1. Environmental Health Institute, Jinan Center for Disease Control and Prevention, Jinan 250021, Shandong, China
  • Published:2021-12-29

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Abstract: Objective To investigate the long-term change of heavy metals concentration and chronic health risk in drinking water in urban and rural areas of Jinan. Methods From 2016 to 2020, the drinking water samples were collected in 10 districts and counties, and 8 heavy metals in 2,690 samples were analyzed, including arsenic, cadmium, chromium(hexagonal), lead, selenium, aluminum, copper and zinc. Based on the Technical Guidelines for Chemical Environmental Health Risk Assessment(WS/T 777-2021), the chronic health risks of the 3 heavy metals(arsenic, lead, copper)in drinking water intake exposure were analyzed. The characteristics of different water samples, water types, and water periods were described. Results Of the 8 heavy metals, 6 showed a descending trend, including arsenic, cadmium, chromium, lead, copper and zinc. Among them, the concentrations of aluminum(7/2 690, 0.22%)and lead(3/2 690, 0.11%)exceeded the national standards. Health risk assessment showed that arsenic had both carcinogenic and non-carcinogenic risks, lead had carcinogenic risk, and copper had non-carcinogenic risk. The main risk indicators of heavy metal pollution in urban drinking water were arsenic, lead and copper, and were arsenic in rural drinking water. The health risks of drinking water in different water samples, water types and water periods showed a downward trend. There were differences in arsenic carcinogenic risk(P=0.016)and lead carcinogenic risk(P<0.001)among different water types. The arsenic carcinogenic risk and copper non-carcinogenic risk in specially treated drinking water were reduced. Conclusion From 2016 to 2020, the concentrations of most heavy metals in the drinking water in Jinan showed a descending trend, but arsenic, lead and copper still had long-term chronic health risks and due attention should be paid to drinking water risk management.

Key words: Drinking water, Heavy metals, Health risk assessment, Change trends, Treatment measures

CLC Number: 

  • R123
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