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The selective separation and recovery of Y (III) from Sr(II) were investigated using a macroporous silica/polymer composite (SiO2-P) supported bis(2-ethylhexyl)phosphate (HDEHP) and 1-dodecanol (dodec) impregnated adsorbent (HDEHP+dodec)/SiO2-P. The adsorption and separation of Y(III) and Sr(II) in HNO3 and HCl solutions onto the adsorbent were investigated by batch and column methods. The adsorbent showed a higher adsorption affinity to Y(III) than Sr(II). The adsorption of Y(III) decreased as the acidity of the solution increased. The adsorption of Y(III) could be expressed by the Langmuir adsorption model and was governed by chemisorption. In addition, the adsorption thermodynamic parameters of Y(III) were calculated using the van’t Hoff equation, and the reaction was found to be exothermic. In column experiments, a relatively satisfactory chromatographic separation of Y(III) from a Sr(II)-Y(III) mixed solution was obtained using the adsorbent packed column.

Separation of Y(III) and Sr(II) from acid solutions by extraction chromatography using HDEHP-impregnated adsorbent and its medical application