核化学与放射化学2012，Vol.34Issue(2)：102-108,7.
6,6'-二(5,6-二乙基-1,2,4-三嗪-3-基)-2,2'-联吡啶萃取分离镅与镧系元素
Separation Americium From Lanthanides by C2-BTBP
洪哲 1叶国安 2唐洪彬 1何辉1
作者信息
- 1. 中国原子能科学研究院放射化学研究所,北京102413
- 2. 环境保护部核与辐射安全中心,北京100082
- 折叠
摘要
Abstract
The extraction behavior of americium and lanthanides from nitric acid solution was investigated under various conditions, such as contact time, the concentration of C2-BTBP, and the concentration of nitric acid. The results show that the extraction equilibrium of americium is reached in 10 minutes. The distribution ratio of americium increases firstly and then decreases with different concentrations of nitric acid. The distribution ratio of lanthanides is very low in different concentration of nitric acid. On the basis of batch extraction experiments, a 10 stages counter-current flowsheet was set up (6 stages for extraction, 4 stages for scrubbing, ratio of flow AF ! AX ! AS=1 ! 1 ! 0. 5, 1. 0 mol/L HN03 of aqueous feed, and 1. 0 mol/L HNO3 as scrubbing solution). The experiment results show that the extraction efficiency of americium and lanthanides is more than 99. 93% and the concentration of lanthanides is less than 0. 03% , respectively. The decontamination factor for americi-
um in lanthanides is more than 103. The experimental results indicate that americium can be
separated from lanthanides by C2-BTBP.关键词
C2-BTBP/镅/萃取/分离Key words
C2-BTBP/ americium/ extraction/ separation分类
能源科技引用本文复制引用
洪哲,叶国安,唐洪彬,何辉..6,6'-二(5,6-二乙基-1,2,4-三嗪-3-基)-2,2'-联吡啶萃取分离镅与镧系元素[J].核化学与放射化学,2012,34(2):102-108,7.
