Next Generation Extractants for Cesium Separation from High-Level Waste: From Fundamental Concepts to Site Implementation
Calix[4]arenebiscrown-6 molecules are currently the selected technology for removal of radioactive cesium-137 from DOE nuclear wastes. By attachment of an acidic function to such molecules, the efficiency with which cesium ion can be extracted from an aqueous solution into an organic diluent is markedly increased since the requirement for concomitant extraction of an aqueous phase anion is avoided. Thus, cesium ion extraction by proton-ionizable calix[4]arenebiscrown-6 molecules may be the ''second-generation'' technology for removal of cesium-137 from DOE nuclear wastes. During Year 1 of this EMSP project, we have established synthetic routes to new, lipophilic, proton-ionizable calix[4]arenebiscrown-6 molecules to be evaluated for solvent extraction of cesium ion at Oak Ridge National Laboratory. Analogous calix[4]arenecrown-6 compounds are also being prepared to determine if even higher cesium ion selectivities can be obtained with extractants having a single crown ether unit.
- Research Organization:
- Oak Ridge National Lab., Oak Ridge, TN; Texas Tech University, Lubbock, TX (US)
- Sponsoring Organization:
- USDOE Office of Science (SC) (US)
- OSTI ID:
- 839359
- Report Number(s):
- EMSP-90252-2003; R&D Project: EMSP 90252; TRN: US0501910
- Resource Relation:
- Other Information: PBD: 1 Jun 2003
- Country of Publication:
- United States
- Language:
- English
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Next Generation Extractants for Cesium Separation from High-Level Waste: From Fundamental Concepts to Site Implementation
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Related Subjects
54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANIONS
AQUEOUS SOLUTIONS
CESIUM
CESIUM 137
CESIUM IONS
CROWN ETHERS
EFFICIENCY
IMPLEMENTATION
ORNL
RADIOACTIVE WASTES
REMOVAL
SOLVENT EXTRACTION
SOLVENTS