西南典型菜地土壤重金属健康风险和毒性效应

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Abstract To figure out the pollution characteristics of heavy metals in soils from typical vegetable planting areas in Tonghai, southwest China, we collected 151soil samples and measured the concentrations of Cd, As, Pb, Cr, Ni, Cu, and Zn. Besides, the bioaccessibility and cytotoxicity of heavy metals were investigated by in vitro gastrointestinal simulation method (SBRC) combined with the human gastric mucosa cells GES-1model. Our results showed that the Cd level in soils exceeded the risk screening value (0.6mg/kg, 6.5 < pH £ 7.5, GB 15618-2018) with the greatest coefficient of variation being 72.73%. The average content of Cr, Cd, and Zn exceeded the soil background values of Yunnan Province. In addition, the bioaccessibility of heavy metals in soil varied greatly, with Cd being the highest at 35.31%. There may be carcinogenic risk caused by metals in the study area, where Cr, As and Ni were the main contributors to carcinogenic risks. However, the non-carcinogenic risk was not obvious. The comprehensive non-carcinogenic risk (HI) and comprehensive carcinogenic risk (CR) based on bioaccessibility data were both lower than those based on total concentrations. To validate the above-mentioned results, GES-1cells were employed and exposed to all bioaccessible extracts of soils, cell viability significantly decreased (P<0.05), and cell morphology was altered in all groups, indicating bioaccessible extracts of soils could induce gastric epithelial cell damage.

Key words： soil heavy metals health risk cytotoxicity

Received: 07 March 2022

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	Articles by authors
	TINA Wen
	ZONG Da-peng
	FANG Cheng-gang
	WANG Cheng-chen
	WANG Jian-min
	XIANG Ping

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TINA Wen,ZONG Da-peng,FANG Cheng-gang等. Health risk and toxic effect of heavy metals in soils from typical vegetable planting areas in southwest China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(10): 4901-4908.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I10/4901

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