Abstract
The distribution of lanthanides (Ln), including also Y, between aqueous HNO3 and a microporous styrene-divinylbenzene copolymer impregnated with diphenyl(dialkylcarbamoylmethyl)phosphine oxides (CMPOs) and their α-substituted derivatives was studied in relation to the aqueous phase acidity and extractant content in the solid phase. Rare-earth elements pass into the sorbent phase in the form of complexes with the Ln : CMPO ratio of 1 : 2. The Ln distribution factors grow as the HNO3 concentration in the aqueous phase is increased from 0.1 to 7.0 M.
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