苏南某区污染耕地农产品镉汞状况调查及健康风险评价

于2019年和2020年在苏南某区污染耕地采集了302份水稻和97份蔬菜样本,评估了农作物可食部分镉(Cd)和汞(Hg)的健康风险.结果表明:水稻籽粒中Cd和Hg含量均高于蔬菜,水稻籽粒和蔬菜Cd含量分别为59.5和50.7μg/kg,超标率为4.6％ 和4.1％;水稻和蔬菜Hg含量分别为4.7和0.7μg/kg,其中...

Survey of Cadmium and Mercury Pollution and Assessment of Health Risk of Crops in Polluted Farmland in Southern Jiangsu

In this study,302 samples of rice grains and 97 samples of vegetables in the farmlands in Southern Jiangsu were collected in 2019 and 2020 and the health risks of cadmium(Cd)and mercury(Hg)in the edible portions of the plants were evaluated.The results showed that Cd and Hg concentrations in rice grains were greater than those in vegetables.The mean concentrations of Cd in rice grains and vegetables were 59.5 and 50.7μg/kg,respectively,and 4.6%and 4.1%exceeding the national standards of China.The mean concentrations of Hg were 4.7 and 0.7μg/kg,respectively,and 3.3%and 0%exceeding the national standards of China.The estimated daily intake(EDI)of Cd and Hg in rice grains and vegetables were 0.371 and 0.239μg/kg,and the total hazard quotient(THQ)of rice grains and vegetables was 0.680(lower than 1),indicating that the health risk of local crops was low.The accumulation differences of Cd and Hg in edible portions of different crop cultivars were further compared,Japonica rice and root vegetables accumulated less Cd in edible portions when compared to Indica rice and leaf vegetables,respectively.Cultivating and consuming more grains from Japonica rice and root vegetables are recommended in order to decrease the potential health risk from Cd and Hg pollution and thus to alleviate the health risk from local crops.