Effects of temperature on the extraction of U(VI) and Pu(IV) by tris(2-methylbutyl) phosphate from nitric acid media
| Autor: | N. Sivaraman, Subramee Sarkar, S. Jayalakshmi, A. Suresh |
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| Rok vydání: | 2017 |
| Předmět: |
Tris
Enthalpy Radiochemistry Extraction (chemistry) Tri-N-butyl Phosphate chemistry.chemical_element 02 engineering and technology Uranium 010403 inorganic & nuclear chemistry Phosphate 01 natural sciences 0104 chemical sciences Plutonium chemistry.chemical_compound 020401 chemical engineering chemistry Nitric acid 0204 chemical engineering Physical and Theoretical Chemistry Nuclear chemistry |
| Zdroj: | Radiochimica Acta. 106:281-289 |
| ISSN: | 2193-3405 0033-8230 |
| DOI: | 10.1515/ract-2017-2833 |
| Popis: | Extraction behavior of tris(2-methylbutyl) phosphate (T2MBP), a higher homologue of tri-n-butyl phosphate (TBP), in the extraction of U(VI) and Pu(IV) from nitric acid media has been evaluated in the present study. Distribution ratios for the extraction of these metal ions by T2MBP were measured as a function of equilibrium aqueous phase nitric acid concentration, extractant concentration and temperature to understand the temperature effects on extraction. Enthalpies of extraction of T2MBP/n-dodecane-U(VI)-HNO3 and T2MBP/n-dodecane-Pu(IV)-HNO3 systems were calculated from the distribution ratio data using “second law” method. The data reveal that the extraction of U(VI) by T2MBP is exothermic in nature, whereas that of Pu(IV) is endothermic. |
| Databáze: | OpenAIRE |
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