Water Soluble PDCA Derivatives for Selective Ln(III)/An(III) and Am(III)/Cm(III) Separation |
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| Authors: | J. Borrini A. Favre-Reguillon M. Lemaire S. Gracia G. Bernier |
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| Affiliation: | 1. ICSM, Institut de Chimie Séparative de Marcoule, UMR-5257 CNRS/CEA/UM2/ENSCM Bat. 426, Bagnols sur Cèze, France;2. ICBMS, Institut de Chimie et Biochimie Moléculaire et Supramoléculaire, UMR-5246, Equipe CASYEN, Université de Lyon, Villeurbanne, France;3. CEA, Nuclear Energy Division, RadioChemistry and Processes Department, SMCS, Elaboration of Separation Processes Laboratory (LEPS), Bagnols sur Cèze, France;4. ICBMS, Institut de Chimie et Biochimie Moléculaire et Supramoléculaire, UMR-5246, Equipe CASYEN, Université de Lyon, Villeurbanne, France;5. CEA, Nuclear Energy Division, RadioChemistry and Processes Department, SMCS, Elaboration of Separation Processes Laboratory (LEPS), Bagnols sur Cèze, France |
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| Abstract: | The synthesis and solvent extraction behavior of dipicolinic acid (pyridine-2,6-dicarboxylic acid, PDCA) and their derivatives have been studied for possible use in selective back-extraction of actinides, especially americium. The extraction was performed from an organic phase containing a mixture of trivalent actinides and lanthanides pre-extracted with N,N,N’,N’-tetraoctyl diglycolamide (TODGA). The efficiency of the back-extraction was enhanced when the picolinate platform was used in a heterocyclic decadentate ligand called h4tpaen. Beyond selective An/Ln extraction, the aqueous soluble h4tpaen ligand seemed a potential reagent for an intra-group Am(III)/Cm(III) separation with a separation factor SFCm/Am of about 3.5. |
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| Keywords: | Solvent extraction picolinic acid PDCA h4tpaen Actinides(III)/ Lanthanides(III) |
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