| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5211279 | Reactive and Functional Polymers | 2007 | 8 Pages |
Abstract
The complexation of uranium(VI) by polymer-supported phosphonate and phosphate diester ligands has been studied in acid solutions up to 4 N. Hydroxy groups proximate to the phosphoryl oxygen increase its basicity which enhances uranium(VI) sorption, particularly in low acid solutions. The mechanism of complexation entails coordination of UO22+ in low acid solutions and anion exchange of UO2Xnâ in high acid solutions. Counterions affect the complexation, especially as solution acidity increases, with uranium distribution being preferred in the order HNO3 > HCl > H2SO4. The different behavior of the counterions is due to their free energies of hydration.
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Organic Chemistry
Authors
Spiro D. Alexandratos, Xiaoping Zhu,