Abstract
Extraction of microamounts of Sr(II) from aqueous solutions with solutions of carbamoyl phosphine oxides in the presence of ionic liquids was studied. The influence of the structure of the extractants and ionic liquids on the efficiency of the Sr(II) extraction was examined, and the stoichiometry of the extractable complexes was determined. The possibility of preconcentrating Sr(II), and also U(VI), Th(IV), and REE(III) from aqueous solutions with a complexing sorbent prepared by noncovalent immobilization of diphenyl( diethylcarbamoylmethyl)phosphine oxide and 1-butyl-3-methylimidazolium bis[(trifluoromethyl)-sulfonyl]imide on a macroporous polymer matrix was demonstrated.
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