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首页> 外文期刊>Separation and Purification Technology >Counter-current extraction of uranium and lanthanides from simulated high-level waste using N,N,N',N'-tetraoctyl diglycolamide
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Counter-current extraction of uranium and lanthanides from simulated high-level waste using N,N,N',N'-tetraoctyl diglycolamide

机译：使用N，N，N'，N'-四辛基二甘醇酰胺从模拟的高放废物中逆流萃取铀和镧系元素

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摘要

A mixture of N,N,N',N'-tetraoctyl diglycolamide(TODGA)and N,N-dihexyl octanamide(DHOA)dissolved in NPH has been evaluated for actinide partitioning from simulated high-level waste by cold tests in mixer-settler runs.The feed solution was a synthetic purex raffinate of pressurized heavy water reactor(PHWR)origin where lanthanides were taken as stand-in for trivalent actinides.Quantitative extraction(forward and backward)of trivalent lanthanides was observed in four stages each.Elements such as Fe,Mn,Ni,Ba and Cs were practically un-extracted.However,Cr and Mo were partially co-extracted.Reusability of the organic phase in five successive cycles suggested excellent hydrolytic stability of the reagent.Though the solvent system was susceptible to radiolytic degradation,negligible effects on the extraction as well as on the stripping of lanthanides were observed with solvent irradiated to 100 KGy radiation dose.
机译：N，N，N'，N'-四辛基二甘醇酰胺（TODGA）和N，N-二己基辛酰胺（DHOA）溶解在NPH中的混合物已通过混合沉降器中的冷试验评估了模拟高放废物中act系元素的分配进料溶液是加压重水反应器（PHWR）的合成纯净残液，其中镧系元素被用作三价act系元素的替代物，在四个阶段分别观察到了三价镧系元素的定量提取（正向和反向）。因为Fe，Mn，Ni，Ba和Cs几乎未萃取，而Cr和Mo则是部分共萃取。有机相在五个连续循环中的可重复使用性表明该试剂具有出色的水解稳定性。对于辐射降解，用100 KGy辐射剂量的溶剂观察到的对镧系元素的萃取和剥离的影响可忽略不计。

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