【摘要】 <正> ²³³Pa是中子辐照钍制取核燃料²³³U的重要中间体。长期以来人们认为用无机吸附剂来分离、纯化²³³Pa是行之有效的方法。我们利用在高通量堆中辐照的钍经阴离子交换法分离获得的²³³Pa、²³³U以及天然Th,研究了在HNO₃介质中,²³³Pa、²³³U及Th在硅胶、SnO₂、Sb₂O₅及MnO₂四种无机吸附剂上的吸附行为,其中SnO₂与Sb₂O₅是前人没有作过系统研究的。通过单管平衡实验,我们找到了²³³Pa吸附及解吸的合适条件,并由柱实验证明,²³³Pa可以从U、Th中获得较好的纯化。从柱实验效果看,硅胶与SnO₂都有良好的性能,但在实际使用中,SnO₂比之硅胶似乎更为理想,因此我们认为SnO₂有可能成为分离、纯化²³³Pa的一种有效吸附剂。更多还原

【Abstract】 The absorption behaviours of 233Pa, 233U and Th on the silica gel, SnO2, Sb2O5 and MnO2 from HNO3 medium were studied. From batch experiments it shows that 233Pa was absorbed by the absorbents while 233U and Th are not absorbed. From column experiments silica gel and SnO2 appeared to be a good absorbents of 233Pa, 233U and Th. The SnO2, with its good physical and chemical properties would be a more effective reagent for isolation and parification of 233Pa.更多还原