【摘要】 研究了广东地区受铀矿污染的土壤中生长的芥菜、大白菜、苋菜的根、茎、叶中²³⁸U、²²⁶Ra、²¹⁰Pb、²¹⁰Po的含量分布情况,其中根为主要富集部位;3种蔬菜的转移系数皆在10^-3～10^-2水平,芥菜的²³⁸U和²²⁶Ra的转移系数之间存在相互影响,大白菜的²¹⁰Pb和²¹⁰Po的转移系数之间也存在相互影响关系;对公众每食入1 kg蔬菜所产生的待积有效剂量做了初步估算,²³⁸U贡献的剂量为0.001～0.105μSv,²²⁶Ra为0.004～0.576μSv,²¹⁰Pb为0.019～0.646μSv,²¹⁰Po为0.010～1.30μSv。更多还原

【Abstract】 The distribution and content of²³⁸U,²²⁶Ra,²¹⁰Pb and²¹⁰Po in roots,stems and leaves of Brassica juncea,Brassica pekinensis and Amaranthus tricolor grown in the uranium contaminated soil of Guangdong district were analyzed.The results showed that the roots were the main enrichment part.The transfer coefficients of the three vegetables were all at the level of 10^-3-10^-2.The transfer coefficients of²³⁸U and²²⁶Ra of Brassica juncea were correlated while the transfer coefficients of²¹⁰Pb and²¹⁰Po of Brassica pekinensis were also correlated.According to the preliminary estimation of committed equivalent dose for public ingestion of 1 kg those vegetables,the dose of²³⁸U ranged from 0.001 to 0.105μSv,²²⁶Ra ranged from 0.004 to 0.576μSv,²¹⁰Pb ranged from 0.019 to 0.646μSv,²¹⁰Pb ranged from 0.019 to 0.646μSv.更多还原