典型污灌区土壤与作物中重金属健康风险评估

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Abstract

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.

Key words： soil crops heavy metal enrichment exposure health risk assessment

Received: 11 September 2017

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	Articles by authors
	WANG Shi-yu
	WU Wen-yong
	LIU Fei
	ZHAO Man
	QIU Jian-qiang
	WU Jun-jun

Cite this article:

WANG Shi-yu,WU Wen-yong,LIU Fei等. Assessment of human health risks of heavy metals in the typical sewage irrigation areas[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1550-1560.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I4/1550

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