1. Physicochemical Reasons for the Use of TiOHPO4 for Treatment of Liquid Radioactive Waste.
- Author
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Lokshin, E. P., Ivanenko, V. I., Udalova, I. A., and Kalinnikov, V. T.
- Subjects
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PHOSPHINE , *RADIOACTIVE wastes , *WASTE treatment , *HYDROGEN-ion concentration , *SODIUM , *RADIOACTIVE substances - Abstract
Heterogeneous exchange of the proton of hydrated titanyl hydrogen phosphate with Li, Na, K, Rb, and Cs cations in aqueous solutions was studied potentiometrically. The sorption equations were proposed. The concentration and thermodynamic equilibrium constants were calculated. The optimal pH range of the solution providing effective sorption of radioactive cesium on hydrated titanyl hydrogen phosphate was determined. The decrease in the efficiency of radiocesium sorption from liquid waste with a high content of competing nonradioactive alkali metal cations is due to a decrease in the pH of this solution in the course of the sorption. To provide efficient sorption removal of radiocesium, the pH should be maintained in the range 4-7, or the sodium form of the sorbent should be used. The selectivity of radiocesium sorption on TiOHPO4 in the presence of excess sodium cation was estimated. [ABSTRACT FROM AUTHOR]
- Published
- 2003
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