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| Safety limits of heavy metals in planted soil of Chinese cabbage based on health risk assessment |
| Received:December 11, 2019 |
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| KeyWord:health risk analysis;vegetable;planting soil;heavy metal;safety limit |
| Author Name | Affiliation | E-mail | | ZHOU Xu | Beijing Key Laboratory of Traditional Chinese Medicine Resources Protection and Utilization, Beijing 100875, China
Engineering Research Center of Natural Medicine, Ministry of Education, Beijing 100875, China
Faculty of Geographical Science of Beijing Normal University, Beijing 100875, China | | | ZHOU An-qi | Beijing Key Laboratory of Traditional Chinese Medicine Resources Protection and Utilization, Beijing 100875, China
Engineering Research Center of Natural Medicine, Ministry of Education, Beijing 100875, China
Faculty of Geographical Science of Beijing Normal University, Beijing 100875, China | | | CAO Hong-bin | Beijing Key Laboratory of Traditional Chinese Medicine Resources Protection and Utilization, Beijing 100875, China
Engineering Research Center of Natural Medicine, Ministry of Education, Beijing 100875, China
Faculty of Geographical Science of Beijing Normal University, Beijing 100875, China | caohongbin@bnu.edu.cn | | LIU Jian-wei | Beijing Key Laboratory of Traditional Chinese Medicine Resources Protection and Utilization, Beijing 100875, China
Engineering Research Center of Natural Medicine, Ministry of Education, Beijing 100875, China
Faculty of Geographical Science of Beijing Normal University, Beijing 100875, China | | | CHEN Yan-jiao | Beijing Key Laboratory of Traditional Chinese Medicine Resources Protection and Utilization, Beijing 100875, China
Engineering Research Center of Natural Medicine, Ministry of Education, Beijing 100875, China
Faculty of Geographical Science of Beijing Normal University, Beijing 100875, China | | | ZHANG Ai-chen | Beijing Key Laboratory of Traditional Chinese Medicine Resources Protection and Utilization, Beijing 100875, China
Engineering Research Center of Natural Medicine, Ministry of Education, Beijing 100875, China
Faculty of Geographical Science of Beijing Normal University, Beijing 100875, China | |
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| Abstract: |
| To ensure the safe consumption of vegetables, it is important to control pollutants at the growth source by setting species-specific safety limits for heavy metals in the planting soil. In this study, the maximum acceptable concentrations of metalloid As and heavy metals Cd, Cr, Cu, Ni, Pb, Zn, and Hg in vegetables were determined on the basis of acceptable health risk levels, daily vegetable intake, and the proportion of heavy metals in the vegetables against the total dietary intake for the general population in China. Large amounts of research data were collected to fit the absorption and enrichment equation of each element contained in Chinese cabbage plants, and the safety limits for these elements in the planting soil were determined. The results showed that the vegetables contributed 12% to 43% of heavy metals in the dietary intake, with the proportions differing among the elements. With the exceptions of As, Cr, and Pb, the estimated safety limits of heavy metals in vegetables were higher than those specified by the National Food Safety Standard Contaminant Limit in Food(GB 2762-2017). The estimated safety limits of As(26 mg·kg-1), Cr(16 mg·kg-1), and Pb(51 mg·kg-1)in the Chinese cabbage planting soil were lower than the corresponding limits set by the National Risk Control Standard for Soil Contamination of Agricultural Land(GB 15618-2018). Therefore, it is necessary to develop soil standards for specific vegetable species. |
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