The results of laboratory experiments on the sorption separation of uranium and rare-earth elements from nitrate-phosphate solutions on a solid extractant with an active phase in the composition of the heter-oradical phosphine oxide and di-(2-ethylhexyl)phosphoric acid are reported. This extractant was used to attain high capacity and degree of extraction of uranium from solutions with initial uranium concentration <0.5 g/dm 3 . The following metrics were studied in the process of sorption concentration of uranium: sorption capacity, kinetics of the sorption process, number of sorption stages, and desorption conditions. The optimal sorption conditions giving high selectivity in terms of uranium and the degree of separation of uranium and rare-earth elements were determined.

中文翻译：

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分离铀和稀土元素的吸附技术的发展

在具有活性相的固体萃取剂上从硝酸磷酸盐溶液中吸附分离铀和稀土元素的实验室实验结果为报道。该萃取剂用于从初始铀浓度 <0.5 g/dm 3 的溶液中获得高容量和高程度的铀萃取。在铀的吸附浓缩过程中研究了以下指标：吸附容量、吸附过程的动力学、吸附阶段的数量和解吸条件。确定了在铀方面具有高选择性的最佳吸附条件以及铀和稀土元素的分离程度。