Method and system for separating strontium from trivalent lanthanides and actinides in solution

The invention provides a method and system for separating strontium from trivalent lanthanides and actinides in a solution, and relates to the field of spent fuel aftertreatment. The method comprises the following steps: obtaining a first preset volume of a first solution containing strontium and trivalent lanthanide and actinide elements; obtaining an extracting agent with a second preset volume; the acidity of the first solution is adjusted to a preset value, a second solution is obtained, and the preset value ranges from 2.5 mol/L to 3 mol/L; and putting the extraction agent and the second solution into extraction equipment, and extracting the second solution through the extraction agent to obtain a target solution. According to the scheme provided by the invention, the separation of strontium from trivalent lanthanide and actinide elements in the solution is realized. 本发明提供一种分离溶液中的锶与三价镧系、锕系元素的方法及系统，涉及乏燃料后处理领域。所述方法包括：获取第一预设体积的含有锶与三价镧系、锕系元素的第一溶液；获取第二预设体积的萃取剂；将所述第一溶液的酸度调节至预设值，得到第二溶液，所述预设值取值范围为2.5-3mol/L；将所述萃