Extraction of Am(III) from Nitric Acid Solutions with Bis(diphenylphosphinylmethyl)phosphinic Acid |
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| Authors: | Turanov A N Karandashev V K Baulin V E Evseeva N K |
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| Affiliation: | (1) Institute of Solid-State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia;(2) Institute of Technological Problems of Microelectronics and Ultrapure Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia;(3) Institute of Physiologically Active Substances, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia |
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| Abstract: | Extraction of trace quantities of Am(III) from aqueous HNO3 solutions with solutions of bis(diphenylphosphinylmethyl)phosphinic acid (I), bis2-(diphenylphosphinyl)phenoxymethyl]phosphinic acid (II), and bis2-(diphenylphosphinylmethyl)phenoxymethyl]phosphinic acid (III) in dichloroethane was studied. The stoichiometry of the extractable complexes was determined; the effect of organic diluent on the extraction was considered. The extractive power of the reagents toward Am(III) grows in the order III < II < I. Acid I surpasses in the extractive power a neutral bidentate extractant, tetraphenylmethylenediphosphine dioxide (TPMDPD), by three orders of magnitude. A synergistic effect in extraction of Am with mixtures of TPMDPD and acid I was revealed. |
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