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An earlier described separation scheme for the actinides, utilising chromatographic columns with TBP and cation exchange resin under pressure (HPLC), as means of separation, has been further investigated with emphasis on the behaviour of neptunium. More than 99% of the neptunium can be washed out in pure form from the first of the two cation exchangers as the monocharged ion NpO(2)(+). The strong influence of the strength of the nitric acid on this separation step is demonstrated. Subsequently, americium, curium and the lanthanides are eluted individually from the second HPLC column by alpha-hydroxyisobutyric acid.

Additional information

Authors: APOSTOLIDIS C, JRC Karlsruhe (DE);BOKELUND H, JRC Karlsruhe (DE);GLATZ J-P, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: New Separation Chemistry for Radioactive Waste and Other Specific Applications, Rome (IT), May 16-18, 1990
Availability: Available from (1) as Paper EN 35545 ORA
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