NUCL 13 |
| A recent extension of cloud point extraction separations of lanthanides has shown that the method offers some degree of separation of the trivalent actinides from the lanthanides. Current studies show that curium can be extracted in solutions containing europium to yield heavy phases that are enriched in curium. The current system under development uses triton X-114, a surfactant, 8-hydroxyquinoline (8-HQ), a chelator, and nitric acid to adjust the pH. The system shows no extraction at pH 5.0 (pKa1 of 8-HQ = 5.13), but shows increased extraction as pH increases over range of pH of 5.7–6.5. Concentrations of 8-HQ examined are 0–4.5 mM. These concentrations correspond to a ratio of [8-HQ]:[total metal] of 0–14.3. Initial tests show that metals extracted into the surfactant rich phase can be back-extracted to the surfactant poor phase by decreasing pH of aqueous phase to around pH 2.5. |
|
Meeting the Diverse Needs of the 21st Century Nuclear Science Workforce: A Symposium by Graduate Student Scientists in Nuclear and Radiochemistry
8:30 AM-12:05 PM, Sunday, August 19, 2007 Boston Park Plaza -- Lexington Room, Oral
Division of Nuclear Chemistry & Technology |