An extraction chromatography resin containing the anionic ligand (?5-pentamethylcyclopentadienyl)tris-(diethylphosphito-P)cobalt(III), (L) has been prepared. The resin consists of 1 wt% L on Amberlite® XAD-7. This resin strongly sorbs Am(III) and Pu(IV). The sorption of these ions decreases with increasing nitric acid concentration, but this effect is more pronounced for Am(III). This allows for convenient separation of Am(III) from Pu(IV) by simple adjustments in the nitric acid concentration. The tripodal geometry of L disfavors the complexation of uranyl ion, so sorption of U(VI) by the L-containing resin is weak.
Revised: June 15, 2011 |
Published: November 1, 2004
Citation
Lumetta G.J., D.W. Wester, B.K. McNamara, T.L. Hubler, S.L. Latesky, C.C. Martyr, and K.N. Richards. 2004.A NEW EXTRACTION CHROMATOGRAPHY RESIN CONTAINING KLÄUI LIGANDS FOR APPLICATION IN ACTINIDE SEPARATIONS.Solvent Extraction and Ion Exchange 22, no. 6:947-960.PNNL-SA-41584.doi:10.1081/SEI-200037442