Method for separating and recovering rubidium and cesium from tail liquid

The invention discloses a method for separating and recovering rubidium and cesium from tail liquid, relates to the technical field of material recovery, and can achieve the rubidium and cesium separation and recovery effect. According to the specific scheme, the method comprises the following steps: preparing levextrel resin by using target polystyrene, 4-tert-butyl-2 (alpha-methylbenzyl) phenol and a diluent, wherein the target polystyrene has a sulfonic acid group, a carboxylic acid group or a phosphate group functional group; the pH of the lithium extraction tail liquid is adjusted to 8-9, first target tail liquid is obtained, and the lithium extraction tail liquid is a mixed solution containing rubidium and cesium; carrying out ion exchange reaction on the first target tail liquid and the levextrel resin to obtain rubidium saturated levextrel resin and residual tail liquid; the rubidium saturated extraction resin is subjected to washing, analysis and evaporative crystallization treatment, and a rubidium