RADOX BEHAVIOUR OF NEPTUNIUM IN THE PRESENCE OF U, PU, AND AM APPLIED IN THEIR SEPARATION BY TBP AND ION EXCHANGE (HPLC)
In this paper a flowsheet is presented for the recovery of neptunium and other actinides such as uranium, plutonium, americium and curium from solutions of dissolved fuels. Essentially, the neptunium is adjusted to the pentavalent oxidation state by Fe(II) under spectrophotometric control in such a way that plutonium remains tetravalent. The uranium and the plutonium are sorbed on a chromatographic column containing polystyrene beads impregnated with TBP, whereas the neptunium and the higher actinides leave the column with the fission products. In a second column the neptunium and the higher actinides are then recovered individually from the fission product solution by high pressure liquid chromatography, HPLC (cation exchange) in a pH gradient with alpha-hydroxyisobutyric acid as eluant. The reduction reactions for neptunium are acid- and time- dependent.
Bibliographic Reference: 2ND INTERNATIONAL CONFERENCE ON THE BASIC AND APPLIED CHEMISTRY OF F-TRANSITION (LANTHANIDES AND ACTINIDES) AND RELATED ELEMENTS, LISBOA (PORTUGAL), APRIL, 6-10, 1987, AVAILABILITY: CEC-LUXEMBOURG, DG-XIII-C-3, POB 1907, MENTIONING PAPER EN 33495 ORA
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Record Number: 1989126100700 / Last updated on: 1989-06-01
Available languages: en