Solvent extraction of trivalent europium and americium into nitrobenzene by using hydrogen dicarbollylcobaltate and 3,3’-bis(diisopropoxyphosphoryl)-1,1’-(3-oxapentane-1,5- -diyl)diurea

Emanuel Makrlík, Petr Vaňura, Pavel Selucký, Vasily Brusko

Abstract


Solvent extraction of microamounts of Eu3+ and Am3+ from water into nitrobenzene by means of a mixture of hydrogen dicarbollylcobaltate (H+B-) and 3,3’-bis(diisopropoxyphosphoryl)-1,1’-(3-oxapentane-1,5-diyl)di­urea (L) was studied. The equilibrium data were explained assuming that the species HL+,  and  (M3+ = Eu3+, Am3+)  are extracted into the organic phase. Extraction and stability constants of the cationic complex species in nitrobenzene saturated with water were determined and discussed. From the experimental results it is obvious that this effective ligand L for the Eu3+ and Am3+ cations could be considered as a potential extraction agent for nuclear waste treatment.

Keywords


liquid-liquid extraction; europium and americium; N-phosphor¬ylated bis-urea; extraction and stability constants; water–nitrobenzene system

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DOI: http://dx.doi.org/10.2298/JSC170220110M

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