Recovery of Eu(III) and Am(III) by solid-phase extraction with tetraphenylmethylenediphosphine dioxide

Recovery of Eu(III) and Am(III) by solid-phase extraction in the form of co mplexes with tetraphenylmethylenediphosphine dioxide (TPMDPD) was studied. TPMDPD is suitable for concentrating these elements from nitric acid soluti ons in the acidity range from pH 5 to HNO3 concentration of 6 M. High degre e of recovery (concentrating factors 10(2)-10(3)) is preserved in extractio n from large volumes of solutions and at a high solution flow rate. The rec overy from nitric, hydrochloric, sulfuric, and phosphoric acid solutions in creases on adding minor amounts of perchloric acid. The recovery is selecti ve: Na, K, Ca, Mg and Al present in concentrations of 2, 1, 10(-1) 10(-2), and 10(-4) M, respectively, do not interfere with extraction from 3 M HNO3, and the same elements present in concentrations of 1, 0.5, 10(-3), 10(-3), and 10(-3) M, respectively, do not interfere with extraction from solution s with pH 5.