摘要
研究了γ辐照纯磷酸三异戊酯(TiAP)和用不同稀释剂稀释后的TiAP对萃取铀(VI)的性能的影响以及酸洗和碱洗γ辐照纯TiAP有机相对萃U(VI)性能的恢复。实验主要考察了辐照情况下吸收剂量、酸度、稀释剂的影响。研究结果表明,和TBP相比,该萃取剂有较好的辐照稳定性,纯萃取剂在吸收剂量达到50kGy时,对U(VI)的萃取分配比才有所上升。而TBP的辐照分解剂量为1kGy。为了探讨稀释剂的影响,考察了γ射线对用不同稀释剂稀释后的TiAP进行辐照后对萃取U(VI)的影响,发现在煤油中辐照对TiAP萃U(VI)性能的影响较小;在1,2-二氯乙烷中影响最大。试验表明,用10%Na2C03洗涤辐照有机相可以降低辐照对萃U(VI)的影响。
The effect of γ-radiation on extraction behavior of U(Ⅵ) with TiAP and the extraction performance of U(VI) by acid and base washing were investigated. It was found that TiAP has better radiation stability compared with TBP. When absorbed dose reached 50kGy, the distribution ratio of U(VI) ascended remarkably. The effect of the addition of diluent was discussed, the experimental results show that kerosene is the best among irradiated diluents for U(VI) extraction. The study also suggests that radiation effect may be eliminated by back-extraction with 10% sodium carbonate.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
北大核心
2004年第5期285-288,共4页
Journal of Radiation Research and Radiation Processing
关键词
Γ辐照
TiAP
溶剂萃取
铀(VI)
γ-irradiation, Tri-isoamyl phosphate (TiAP) , Solvent extraction, U(Ⅵ)
