Human health risk assessment of Cd in vegetables and the remediation effect of Cd-polluted soil evaluated using an in-vitro simulation test

• Main Authors: CHEN Chen, GUO Xue-yan, WANG Meng, JIA Xing-yong, CHEN Shi-bao
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2020-01-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: cd, polluted soil, vegetable, health risk, remediation
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2020/1/20200118.htm

Cd-polluted field soil was collected from a greenhouse in Beijing and a pot experiment was conducted to investigate the uptake and accumulation of Cd by leek and rape. The bioavailability of Cd in human gastric juice and human health risk of Cd in vegetables grown on Cd-polluted soil and soil remediated with amendments(zeolite+earthworm manure, attapulgite+earthworm manure) were determined using an in-vitro simulation test and by health risk assessment, respectively. The results indicated that the Cd content in the both vegetables exceeded the <i>National Food Safety Standard</i> and that there was a significant difference in the uptake content of Cd between the vegetables. The Cd content in rape was 1.04 times higher than that in leek. According to the in-vitro simulation test, the bioavailable Cd content in leek and rape reached 0.027, 0.039 mg&#183;kg^-1 fresh weight, indicating that Cd in leek is more available for human than that in rape. The carcinogenic risk of Cd to human body was observed for the both vegetables based on the health risk assessment. Moreover, the carcinogenic risk to children aged 0~6 years was higher than that to adults aged >18 years. The maximum decrease in the Cd content in leek and rape grown on soil treated with amendments was 65.2% and 72.3%, respectively, compared with that in the corresponding controls. Further, the bioavailability and carcinogenic risk of Cd in leek and rape decreased significantly with different soil amendment treatments, and the carcinogenic risk value of Cd approached the safety level in the both vegetables grown on soil treated with a mixture of attapulgite and earthworm manure.