A trialkyl phosphine oxide functionalized task specific ionic liquid for actinide ion complexation: extraction and spectroscopic studies

摘要

A trialkylphosphine oxide functionalized task specific ionic liquid (PO-TSIL) with a NTf _(2) ~(?) counter anion was synthesized and evaluated for the extraction of actinide ions such as UO _(2) ~(2+) and Pu ~(4+) from acidic feed solutions using room temperature ionic liquids (RTIL) such as [BMIM][NTf _(2) ] and [OMIM][NTf _(2) ] as the diluents. The extraction data were compared with those obtained with tri- n -octylphosphine oxide (TOPO) in the same set of RTILs. The extracted species following a cation-exchange mechanism were analyzed by the conventional slope analysis method. The nature of the bonding in the extracted complexes was investigated by various spectroscopic techniques such as luminescence and UV-visible spectroscopy. Studies on the stripping and radiation stability were also carried out for possible nuclear fuel cycle applications.