Abstract The simultaneous separation of Am and Cm from lanthanides is important for atomic energy fields. However, the process is difficult owing to the chemical behavior of trivalent metal ions with similar ionic radii. All lanthanides, Am, and Cm can be extracted by diglycolamide (DGA). In addition, relatively high separation factors between An and Ln were obtained by the extraction system of TODGA, DTPA (diethylenetriamine-N,N,N′,N″,N″-pentaacetic acid) and HNO3. In this work, DTPA-BA (diethylenetriamine-N,N′,N″-triacetic-N,N″-bisamide), which is an improved version of DTPA, was employed for the separation of Ln and An. After performing a basic study on DTPA-BA, a relatively high separation factor (approximately 8) for actinides/lanthanides was obtained. Then, the multi-step extraction was performed. Thus, the recoveries of 94.7 % for Nd and 4.7 % for Am and Cm in organic phase, and 5.3 % Nd and 95.3 % for Am and Cm in aqueous phase were obtained.

中文翻译：

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使用 TODGA-DTPA-BA-HNO3 系统通过多步萃取同时从 Nd 和 Sm 中分离 Am 和 Cm

摘要 从镧系元素中同时分离 Am 和 Cm 对原子能领域很重要。然而，由于具有相似离子半径的三价金属离子的化学行为，该过程很困难。所有镧系元素、Am 和 Cm 都可以通过二甘醇酰胺 (DGA) 提取。此外，通过TODGA、DTPA（二亚乙基三胺-N,N,N',N”,N”-五乙酸）和HNO3的萃取系统，获得了较高的An和Ln分离系数。在这项工作中，DTPA-BA（二亚乙基三胺-N,N',N”-三乙酸-N,N”-双酰胺）是DTPA的改进版本，用于分离Ln和An。在对 DTPA-BA 进行基础研究后，获得了相对较高的锕系/镧系元素分离系数（约 8）。然后，进行多步提取。因此，Nd 和 4 的回收率为 94.7%。