【摘要】 报道了兰州市主要农畜产品中天然放射性核素 2 38U、2 2 6 Ra和 2 32 Th的含量水平 ,粮食中的平均值分别为0 .1 4、0 .1 6和 0 .1 8Bq/ kg,蔬菜为 0 .1 4、0 .0 9和 0 .0 5 Bq/ kg,水果为 0 .0 4、0 .0 5和 0 .0 3 Bq/ kg,肉类为 0 .2 3、0 .2 1和 0 .1 7Bq/ kg,蛋、奶为 0 .1 4、0 .0 3和 0 .0 6Bq/ kg;估算了由食入农畜产品致公众放射性核素年摄入量为 1 2 5 .8Bq。结果表明 ,兰州市农畜产品天然放射性核素含量水平与公众年摄入量属正常水平更多还原

【Abstract】 The levels of natural radioactive nuclides 238 U, 226 Ra and 232 Th in the agricultural animal products in Lanzhou City are investigated in this paper.The average contents are 0.14, 0.16 and 0.18 Bq/kg in the grain, 0.14,0.09 and 0.05 Bq/kg in the vegetables, 0.04 ,0.05 and 0.03 Bq/kg in the fruits, 0.23,0.21 and 0.17 Bq/kg in the meat and 0.14,0.03 and 0.06 Bq/kg in the egg and milk,respectively. The total annual intake of the adult community from the radioactive nuclides of 238 U, 226 Ra and 232 Th in the agricultural animal products is 125.8 Bq. Results show that the content of the natural radioactive nuclides in the agricultural animal products and the annual intake of the community remain normal in Lanzhou City.更多还原