I&EC 158 |
| In another presentation, extensive data on sorption affinity of U, Np, Pu and Am metal ions toward the Kläui Ligand impregnated XAD resin have been reported. In some cases the distribution coefficients obtained for redox sensitive actinides (Np and Pu) are found to be markedly different from trends observed for the corresponding oxidation state of more redox stable actinide metal cations [Am(III), U(VI)] as a function of acid concentration. The reasons for these deviations are difficult to understand without redox speciation and complexation analysis of actinides both in the aqueous phase before and after contact with the resin and on the resin beads' surface. This presentation will discuss advantages optical absorbance spectroscopy (OAS) can offer to monitor complexation effects and redox perturbations occurring in the process of interaction of certain actinide metal cations with Kläui ligands. These data will be compared to the previously reported binding affinity and spectral features of actinides in the +3, +4, +5, and +6 oxidation states with Kläui ligands in a two component organic solvent (mixture of methanol and carbon tetrachloride). |
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Separation of f-Elements, Sponsored by Separation Science and Technology Sub-Division
1:45 PM-4:45 PM, Wednesday, 13 September 2006 Moscone Center -- Room 250, Oral
Division of Industrial & Engineering Chemistry |