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Pillared metal(IV) phosphate-phosphonate extraction of actinides
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J. D. Burns
Published/Copyright:
January 16, 2012
Abstract
Four pillared metal(IV) phosphate-phosphonate ion exchange materials were synthesized and characterized. Studies were conducted to determine their affinity for the lanthanides (Ln´s) and actinides (An´s). It was determined that by simply manipulating the metal source (Zr or Sn) and the phosphate source (H3PO4 or Na3PO4) large differences were seen in the extraction of the Ln and An species. Kd values higher than 4×105 were observed for the AnO22+ species in nitric acid at pH 2. These basic uptake experiments are important, as the data they provide may indicate the possibility of a separation of Ln´s from An´s or even more notably americium from curium and Ln´s.
Keywords: Ion exchange; Lanthanides and actinides; Extraction of actinides; Nuclear waste; Separations
Published Online: 2012-01-16
Published in Print: 2012-06
© by Oldenbourg Wissenschaftsverlag, TX 77843-3255, Germany
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Keywords for this article
Ion exchange;
Lanthanides and actinides;
Extraction of actinides;
Nuclear waste;
Separations
Articles in the same Issue
- Ratio primary reference measurement procedure (RPRMP) for the determination of iron in biological materials by RNAA
- Binding of stereognostically designed ligands to trivalent, pentavalent, and hexavalent f-block elements
- Uranyl complexes formed with a para-t-butylcalix[4]arene bearing phosphinoyl pendant arms on the lower rim. Solid and solution studies
- Spectroscopic studies on U(VI)-salicylate complex formation with multiple equilibria
- Pillared metal(IV) phosphate-phosphonate extraction of actinides
- Coprecipitation of europium with barium sulphate
- Radon capture with silver exchanged zeolites
- Increase in the specific radioactivity of tritium-labeled compounds obtained by tritium thermal activation method
