A thermodynamic selectivity scale for Ce3+/H+ and Am3+/H+ systems on Dowex 50W resins from nitric acid medium
| Autor: | C. Janardanan, A. Ramanujan, P. V. Achuthan, B. M. Misra |
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| Rok vydání: | 1997 |
| Předmět: |
Activity coefficient
Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Analytical chemistry Ionic bonding Electrolyte Pollution Analytical Chemistry chemistry.chemical_compound Nuclear Energy and Engineering chemistry Ionic strength Nitric acid Phase (matter) Radiology Nuclear Medicine and imaging Selectivity Spectroscopy Equilibrium constant |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 224:15-20 |
| ISSN: | 1588-2780 0236-5731 |
| DOI: | 10.1007/bf02034605 |
| Popis: | Batch equilibrium distribution data for Ce3+/H+ and Am3+/H+ systems in 0.2 to 4.0M HNO3 on 1, 2, 4, 8, 10, 12 and 16% crosslinked Dowex 50W resins are reported. These data, along with the mean ionic activity coefficients of the tracer in the mixed electrolyte solutions, were used to calculate the equilibrium constant (Ka) uncorrected for the resin phase activity coefficient. The logKa values obtained at various ionic strengths were fit to a second order quadratic equation. Using the fitting parameters, logKa values were calculated for the different resins at zero ionic strength. LogK (equilibrium constant) values were computed by neglecting the changes in the activity coefficient terms in the resin phase due to resin loading. The logK values reported for Ce3+/H+ systems at a few crosslinkages are compared and the magnitude of the error in the approximate calculations is discussed. |
| Databáze: | OpenAIRE |
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