Assessment of human health risks of heavy metals in the typical sewage irrigation areas
WANG Shi-yu1,2, WU Wen-yong1, LIU Fei2, ZHAO Man3, QIU Jian-qiang4, WU Jun-jun5
1. State Key Laboratory of Simulation and Regulation of the Water Cycle in the River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100048, China;
2. School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083, China;
3. Hejian Water Authority, Hejian 062450, China;
4. 514 Brigade of Tianjin North China Geological Explora, Chengde 067000, China;
5. Hebei Fourth Geological Brigade of Geology and Mineral Resources Exploration, Chengde 067000, China
9 typical sewage irrigation areas were selected at China and abroad as the research objects. Then, pollution of heavy metal in soils and crops were analyzed and adults' and children's health risks were evaluated. The results showed that, in general, the concentrations of heavy metal in wheat were higher than the concentrations in corns. The concentrations of Cd in corns and wheats were 1.62 and 7.5mg/kg, respectively, which were 8.1 and 37.5 times of WHO/FAO criterions. Moreover, this was related to the high concentration of Cd in soil. Ingestion of wheat was the exposure route that induced the maximum risk to humans, and the risks level ranged 10-6 to 10-4 a-1. The human risks induced by wheat ingestion of Cd for adults and children accounted for 61.75%~99.93%, 60.78%~99.93% respectively of the total human health risks. The health risks induced by heavy metals for children were stronger than the risks for adults in all different ways of exposure. The human health risks induced by heavy metal in BL, HR, MQ and JP sewage irrigation areas for adults and children were 5.12×10-5~7.53×10-4、5.71×10-5~8.37×10-4,respectively, which exceeded the EPA and ICRP standards. And the most polluted area was BL.
王世玉, 吴文勇, 刘菲, 赵漫, 邱建强, 仵军军. 典型污灌区土壤与作物中重金属健康风险评估[J]. 中国环境科学, 2018, 38(4): 1550-1560.
WANG Shi-yu, WU Wen-yong, LIU Fei, ZHAO Man, QIU Jian-qiang, WU Jun-jun. Assessment of human health risks of heavy metals in the typical sewage irrigation areas. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1550-1560.
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