| Autor: |
Serrano, J., Reynoso, R., Millán, S., Fucugauchi, L. |
| Zdroj: |
Journal of Radioanalytical and Nuclear Chemistry; April 1993, Vol. 170 Issue: 1 p157-164, 8p |
| Abstrakt: |
Abstract: In order to determine the best conditions for removing95Zr from uranium/hydrogen carbonate solutions, the adsorption behavior of fission product95Zr on hydrated MnO2 as a function of HCO 3– ion molarity has been studied both in the presence and absence of uranium. Batch experiments showed that the maximum95Zr uptake occurred at low HCO 3– concentration, both in uranium-free and uranium (at a constant molarity of 0.02) containing solutions, the relative95Zr uptake being lower when uranium was present in the solution. Conversely, when the HCO 3– concentration augmented beyond 0.10M, the95Zr uptake was higher for the uranium containing solution. Concerning this last case, the maximum95Zr uptake was found at a 0.06M HCO 3– concentration. However at this HCO 3– concentration, uranium was observed to precipitate and thus, a HCO 3– concentration of 0.12M was chosen to perform the dynamic95Zr removal by MnO2 from uranium/hydrogen carbonate solutions. Under these conditions, the95Zr removal reached 99%. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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