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Dissociation constants of the transplutonium element chelates of diethylenetriaminepenta-acetic acid (DTPA) and the application of DTPA chelates to solvent extraction separations of transplutonium elements from the lanthanide elements

Authors
Journal
Journal of Inorganic and Nuclear Chemistry
0022-1902
Publisher
Elsevier
Publication Date
Volume
27
Issue
8
Identifiers
DOI: 10.1016/0022-1902(65)80327-x

Abstract

Abstract The dissociation constants of the DTPA complexes with Am, Cm, Bk, Cf, Es and Fm have been determined by an ion exchange technique, and the values obtained are: Americium 10 −22·92, Curium 10 −22·99, Berkelium 10 −22·79, Californium 10 −22·57, Einsteinium 10 −22·62 and Fermium 10 −22·70. A solvent extraction system has been developed to completely separated the transplutonium elements from the lanthanide fission products by extracting the lanthanide elements into an organophosphonate from a carboxylic acid-buffered solution of DTPA. The separation factor between americium and the lanthanide elements is about fifty.

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