华中农业大学在稻米重金属污染特征分析及健康风险评价方面取得新进展

　　Long-term co nsumption of rice co ntaining heavy me tal(loid)s poses significant risks to public health, which can be scientifically e valuated through food safety assessment. However, spatial variability and uncertainty in exposure parameters are generally neglected in existing food safety assessment standards. This study focused on rice co nsumption in 32 provinces of China, and extracted 3,376 data points of five heavy me tal(loid)s (cadmium, arsenic, mercury, lead, and chromium) and two nutrient elements (copper and zinc) from 408 articles. Probability and fuzzy methods were integrated to cope with the spatial variability or uncertainty and more accurately e valuate the risk. The results demo nstrated that long-term co nsumption of rice that meets the natio nal food safety standards still can cause non-negligible health risks, particularly for children and toddlers with chro nical exposure. Arsenic and Cd were found to be the most critical elements, which co ntribute to 64.57% and 22.38% of the overall human health risk, respectively. Fuzzy assessment indicated that the score in northern China is approximately eight folds of that in southern China, indicating that northern rice has lower risks and better nutrition. Our results demo nstrate that the food safety standards need to be tailored according to local co nditions with more specific receptor parameters and risk acceptance.

　　论文链接：https://www.nature.com/articles/s43247-023-00723-7