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Solubility of Sn(IV) Oxide in Dilute NaClO4 Solution at Ambient Temperature

  • Takayuki Amaya (a1), Tamotsu Chiba (a2), Kazunori Suzuki (a1), Chie Oda (a3), Hideki Yoshikawa (a3) and Mikazu Yui (a3)...

Abstract

The solubility of Sn(IV) oxide was determined in a dilute NaClO4 solution with pH 2 through 12 at ambient temperature. Both oversaturation and undersaturation experiments were carried out in an inert gas glovebox where the concentration of the oxygen and carbon dioxide were less than 1 ppm. The solubility of Sn(IV) oxide was 3×10-8 mol/1 at neutral pH, and increased at pH >7.5. Equilibrium constants of soluble reactions were calculated from the experimental data, using curve fitting method.

The study suggests that the solubility of Sn(IV) oxide would be higher than that provisionally used in current safety assessments of HLW disposal sites.

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References

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1. PNC: Research and Development on geological disposal of high level radioactive waste: First progress report. PNC Tech. Rep. TN 1410 93–081, Tokyo 1992, ∼pp. 495.
2. McKinley, I. G. and Savage, D. in Fourth International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, (Charleston SC USA, December 12–17, 1993) pp. 657665 (1994)
3. Brookins, D. G., Eh-pH Diagrams for Geochemistry (Springer-Verlag, Berlin 1988)
4. Snoeyink, V. L., et al. , WATER CHEMISTRY (1980)

Solubility of Sn(IV) Oxide in Dilute NaClO4 Solution at Ambient Temperature

  • Takayuki Amaya (a1), Tamotsu Chiba (a2), Kazunori Suzuki (a1), Chie Oda (a3), Hideki Yoshikawa (a3) and Mikazu Yui (a3)...

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