Selective extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene in ionic liquid solvents and its application to the treatment of high-level liquid waste
- 1. Japan Nuclear Fuel Limited, Kamikita-gun, Aomori (Japan)
- 2. Tohoku University, Sendai, Miyagi (Japan). Department of Quantum Science and Energy Engineering, Graduate School of Engineering
Description
To separate heat-generating Cs from high-level liquid waste (HLLW), the extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (calix[4]arene-R14) in combination with 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) ionic liquids ([Cn mim][NTf2], where n = 2, 4, and 6) was investigated. Under moderately acidic conditions, the calix[4]arene-R14/[Cn mim][NTf2] system showed a higher extraction efficiency (ECs) than that exhibited by the conventional calix[4]arene-R14/dichloromethane system. All extraction processes reached equilibrium within 5 min. Slope analysis revealed that the Cs:calix[4]arene-R14 inclusion complex has a 1:1 stoichiometry. The extraction was found to be exothermic and influenced by the presence of Na(I). These extraction systems exhibited high efficiency and selectivity for Cs(I) in simulated HLLW. (author)
Additional details
Publishing Information
- Journal Title
- Journal of Radioanalytical and Nuclear Chemistry
- Journal Volume
- 316
- Journal Issue
- 3
- Journal Page Range
- p. 1067-1073
- ISSN
- 0236-5731
- CODEN
- JRNCDM
INIS
- Country of Publication
- Hungary
- Country of Input or Organization
- Hungary
- INIS RN
- 49067487
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- CESIUM; HIGH-LEVEL RADIOACTIVE WASTES; LIQUID WASTES; MOLTEN SALTS; SOLVENT EXTRACTION
- Descriptors DEC
- ALKALI METALS; ELEMENTS; EXTRACTION; MATERIALS; METALS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; SALTS; SEPARATION PROCESSES; WASTES
Optional Information
- Notes
- 20 refs.