Recovery of radio-cesium from actual high level liquid waste using solvents containing calix[4]arene-crown-6 ligands
| Autor: | S.Y. Jadhav, P.M. Gandhi, G.K. Kalyankar, Poonam Jagasia, P.S. Dhami, Seraj A. Ansari, Prasanta K. Mohapatra, U.K. Kharul |
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| Rok vydání: | 2017 |
| Předmět: |
Nuclear fission product
Materials science Chromatography Membrane method Process Chemistry and Technology Inorganic chemistry Radioactive waste chemistry.chemical_element 02 engineering and technology Liquid waste 021001 nanoscience & nanotechnology 010403 inorganic & nuclear chemistry 01 natural sciences Pollution 0104 chemical sciences chemistry Caesium Radiolysis Chemical Engineering (miscellaneous) Fiber 0210 nano-technology Waste Management and Disposal Contactor |
| Zdroj: | Journal of Environmental Chemical Engineering. 5:4134-4140 |
| ISSN: | 2213-3437 |
| Popis: | This paper gives two methods, viz. a solvent extraction method and a hollow fiber contactor based liquid membrane method, for the separation of radio-cesium from actual high level liquid waste (HLLW) solutions using calix[4]arene-crown-6 based solvent systems. While the solvent extraction method involved calix[4]arene-bis-benzo-crwon-6 (CBC) in PTMS (phenyltrifluoromethyl sulphone), the hollow fiber supported liquid membrane method used a polysulphone fiber containing contactor and bis-octyl-benzo-calix[4]arene-mono-crown-6 (CMC) in 40% iso -decanol + 60% n -dodecane. Both methods reported selective radio-cesium separation with almost no contamination from the associated fission product radionuclides. The radiolytic stability of the hollow fiber contactor was checked by keeping the contactor module in contact with the diluted HLLW for 50 days. The second run carried out after 50 days resulted in excellent reproducibility suggesting efficacy of this method for radioactive waste remediation. |
| Databáze: | OpenAIRE |
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