Zhou Hui, Ge Tao, Li Hui, Fang Ting, Li Huaiyan, Shi Yanhong, Zhang Rong, Dong Xinju
Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230026, China.
Anhui Research Institute of Geological Experiment, Hefei 230001, China.
Foods. 2022 Apr 16;11(8):1160. doi: 10.3390/foods11081160.
Rice-crayfish system has been extensively promoted in China in recent years. However, the presence of toxic elements in soil may threaten the quality of agricultural products. In this study, eight toxic elements were determined in multi-medium including soil, rice, and crayfish from the rice-crayfish system (RCS) and conventional rice culture (CRC) area. Crayfish obtained a low level of toxic element content, and mercury (Hg) in rice from RCS showed the highest bioavailability and mobility. Health risk assessment, coupled with Monte Carlo simulation, revealed that the dietary exposure to arsenic (As) and Hg from rice and crayfish consumption was the primary factor for non-carcinogenic risk, while Cd and As were the dominant contributors to the high carcinogenic risk of rice intake for adults and children, respectively. Based on the estimated probability distribution, the probabilities of the total cancer risk (TCR) of rice intake for children from RCS were lower than that from CRC.
近年来，稻虾共生系统在中国得到了广泛推广。然而，土壤中有毒元素的存在可能会威胁到农产品的质量。在本研究中，测定了稻虾共生系统（RCS）和传统水稻种植（CRC）区域的土壤、水稻和小龙虾等多种介质中的8种有毒元素。小龙虾的有毒元素含量较低，RCS水稻中的汞（Hg）具有最高的生物有效性和迁移性。结合蒙特卡洛模拟的健康风险评估表明，食用水稻和小龙虾导致的砷（As）和Hg膳食暴露是非致癌风险的主要因素，而Cd和As分别是成人和儿童水稻摄入致癌风险高的主要贡献因素。根据估计的概率分布，RCS地区儿童摄入水稻的总癌症风险（TCR）概率低于CRC地区。
