The Separation of Am from Lanthanides by Purified Cyanex 301 Extraction
The Separation of Am from Lanthanides by Purified Cyanex 301 Extraction
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DOI：
10.1080/01496399608000823
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发表时间：
1996-11
影响因子：
2.8
通讯作者：
Jing Chen;Yongjun Zhu;R. Jiao
中科院分区：
文献类型：
--
作者：
Jing Chen;Yongjun Zhu;R. Jiao
测定了硝酸介质中用纯化Cyanex 301萃取微量镧系元素（La，Ce，Pr，Nd，Sm）中示踪量Am的分离因子：SFAm/La = 3500，SFAm/Ce，Pr = 1000，SFAm/Nd = 1900，SFAm/Sm = 4500，平均值>2300。分配比随水相中镧系元素浓度的增加而降低。在大量Pr + Nd（0.1 ~ 0.6M）存在下，分离因子SFAm/Eu和SFAm/Pr+ Nd分别为4.7 × 103和2.1 × 103。结果表明，采用三级萃取和两级洗涤，可将99.99%以上的Am与99.99%的Eu分离，并将<0.6%的Pr ± Nd萃取到有机相中。
Abstract Separation factors of tracer amounts of Am from micro lanthanides (La, Ce, Pr, Nd, and Sm) by purified Cyanex 301 extraction in nitrate media have been determined: SFAm/La ∼ 3500, SFAm/Ce,pr ∼ 1000, SFAm/Nd ∼ 1900, and SFAm/Sm∼ 4500, with an average value >2300. The distribution ratio decreases with increasing lanthanide concentration in the aqueous phase. In the presence of a macro amount of Pr + Nd (0.1 ∼ 0.6 M) the separation factors SFAm/Eu and SFAm/pr+Ndare about 4.7 × 103 and 2.1 × 103, respectively. The results of the countercurrent fractional process show that by using three extraction stages and two scrubbing stages, >99.99% Am can be separated from a tracer amount of Eu with 99.99% Am and <0.6% macro amount of Pr ± Nd are extracted into the organic phase.