Alkyl (N,N-dibutylcarbamoylmethyl)methylphosphinates as new reagents for extraction and sorption of f-elements and technetium(VII) from acidic solutions

摘要

Liquid-phase extraction and sorption (solid-phase extraction) of Am-III, Eu-III, U-VI, and Tc-VII with alkyl (N,N-dibutylcarbamoylmethyl)methylphosphinates (ADM) from nitric acid solution were studied. The solvate numbers of extracted U-VI, Am-III, Eu-III, and Tc-VII complexes and the separation factors for Am-III/Eu-III (f (Am/Eu)), Tc-VII/Eu-III (f (Tc/Eu)), and U-VI/Tc-VII (f (U/Tc)) pairs were determined. It was shown for the extraction of Am-III and sorption of Pu-IV that various ADM derivatives are most efficient for the extraction and sorption concentration of actinides: the heptyl derivative (C-7) is efficient for extraction and the decyl derivative (C-10) is most efficient for sorption.