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本文以Talspeak流程为基础,较系统地研究了在HDEHP/煤油-DTPA-乳酸-NO_3~-体系中~(241)Am和~(152+154)Eu的分配比与水相pH、DTPA浓度和萃取剂浓度的关系。研究了离子强度、乳酸浓度、杂质离子、温度、未经纯化的萃取剂对~(241)Am,~(152+154)Eu分配比的影响。测定了另外几个稀土元素、裂片元素及~(239)Pu在此萃取体系中的分配。推荐了络合反萃锕系元素使之与镧系元素分离的条件,以及从络合介质中共萃锕系和镧系元素使之与裂片元素、~(239)Pu和其他杂质离子分离的条件。
Based on the Talspeak scheme, the distribution ratios of ~ (241) Am and ~ (152 + 154) Eu in HDEHP / kerosene-DTPA-lactic acid-NO3- system were compared systematically with the water phase pH, DTPA concentration and Extractant concentration relationship. The effects of ionic strength, lactic acid concentration, impurity ions, temperature, and unpurified extractants on the partition ratio of ~ (241) Am and ~ (152 + 154) Eu were studied. The distribution of several rare earth elements, lamellae and ~ (239) Pu in this extraction system was also determined. The conditions for the complexation and stripping of actinides to the lanthanides and the conditions for the separation of actinides and lanthanides from the lamellae, ~ (239) Pu and other impurity ions from the complexing medium are recommended .