三七及种植土壤重金属污染特征与风险评价

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Abstract Panax notoginseng (P. notoginseng) and its growing soil from the main producing area Wenshan, Yunnan Province, were sampled and analyzed. The uptake and accumulation characteristics of Cd, As, and Pb were analyzed by determining their concentrations in soils and the aboveground and underground parts of P. notoginseng. The food safety risk and human health risk of Cd, As, and Pb in P. notoginseng were evaluated by analyzing their daily intake (ADI) and target hazard quotient (THQ). The results showed that. Cd and As concentrations in soils were 0.07~4.1 and 13.9~310 mg/kg, with standard-exceeding ratios being 63.2% and 79%, while Pb was within the standard values. The comprehensive pollution index P was >3, with an average value of 3.52, indicating that soil pollution reaches heavy pollution level. The proportion of soil samples with single factor pollution index P_Cd and P_As>1were 63.2% and 84.2%, indicating that soil Cd and As are at light pollution level. Cd, As, and Pb concentrations in P. notoginseng aboveground and underground parts were 0.05~0.69, 0.07~0.73; 0.25~1.06, 0.09~1.73; and 0.12~1.13, 0.07~0.66mg/kg dw, respectively. The standard-exceeding ratio of Cd was 26.3%~36.8% while As and Pb were within the standards, indicating P. notoginseng prefers to uptake Cd, thereby should be paid more attention. Cd concentrations in P. notoginseng and soil were significantly positively correlated (p<0.01), while for As and Pb were negatively correlated. Bioconcentration factor BCF_Cd was 0.03~3.5, while BCF_As and BCF_Pb were <1, which further indicated that P. notoginseng has a strong uptake ability for Cd. Translocation factor was in the order of TF_Pb (3.53)>TF_As (2.32)>TF_Cd (0.59), indicating that P. notoginseng prefers to accumulate Cd in the underground edible part, thus its food safety risk and human health risk deserve attention. Cd, As, and Pb daily intake indexes (ADI) of P. notoginseng were 0.0026~0.0035, 0.0043~0.0066, and 0.0026~0.0059mg/d, and the mean ADI percentages were 3.3%~4.7%, 4.3%~5.8%, and 1.2%~2.7%, indicating that Cd and As in P. notoginseng has high food safety risk (ADI>1%). The proportions of target hazard quotients THQ>1of Cd, As and Pb were 42.1%~68.4%, 84.2%~100%, and 0~31.6%, indicating that intaking Cd and As via long-term ingestion of P. notoginseng has potential human health risks.

Key words： Panax notoginseng soil heavy metals uptake and accumulation food safety risk human health risk

Received: 05 May 2022

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X53

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	Articles by authors
	LUO Zeng-ming
	JU Yong-wang
	ZHANG Hui-juan
	DING Hao-jie
	XU Qi-jing
	LIU Xue

Cite this article:

LUO Zeng-ming,JU Yong-wang,ZHANG Hui-juan等. Heavy metals pollution characteristic in Panax notoginseng and planting soil and the associated risk assessment[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(12): 5775-5784.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I12/5775

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