| Autor: |
Belot, Y., Gailledreau, C., Rzekiecki, R. |
| Zdroj: |
Health Physics; June 1966, Vol. 12 Issue: 6 p811-823, 13p |
| Abstrakt: |
A bauxite of large specific area is tested for cationic exchange properties. The cationic sorption increases with pH of solution; it reaches for calcium or sodium a value of 43 m-moles/100 g at pH 12. This bauxite is then wetted by binary solutions, where the sodium ion is the macrocomponent and the alkaline-earth ion the microcomponent. By counting strontium-90, calcium-45 and barium-140 the distribution of the microcomponent is checked at different times. An equilibrium is reached, sometimes very slowly. From equilibrium data, “adsorption isotherms” are plotted and selectivity coefficients computed. The alkaline-earth cations behave like monovalent species, but their apparent binding energy is unusually high and increases with their dilution on the surface of the activated oxide. Several assumptions are made to explain this behavior, |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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