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

Published online by Cambridge University Press:  03 September 2012

Takayuki Amaya
Affiliation:
JGC, Nuclear Research Center, 2205, Naritacho Oaraimachi. Ibaraki Pref., 311–13, Japan
Tamotsu Chiba
Affiliation:
JGC, No.2 Project Div. Landmark tower 2–2–1–1, Minato mirai, Yokohama 220–81, Japan
Kazunori Suzuki
Affiliation:
JGC, Nuclear Research Center, 2205, Naritacho Oaraimachi. Ibaraki Pref., 311–13, Japan
Chie Oda
Affiliation:
PNC, Muramatsu, Tokai-mura, Naka-gun, Ibaraki Pref., 319–11, Japan
Hideki Yoshikawa
Affiliation:
PNC, Muramatsu, Tokai-mura, Naka-gun, Ibaraki Pref., 319–11, Japan
Mikazu Yui
Affiliation:
PNC, Muramatsu, Tokai-mura, Naka-gun, Ibaraki Pref., 319–11, Japan
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Abstract

The solubility of Sn(IV) oxide was determined in a dilute NaClO4solution with pH 2 through 12 at ambient temperature. Both oversaturationand undersaturation experiments were carried out in an inert gas gloveboxwhere the concentration of the oxygen and carbon dioxide were less than 1ppm. The solubility of Sn(IV) oxide was 3×10-8 mol/1 at neutralpH, and increased at pH >7.5. Equilibrium constants of soluble reactionswere calculated from the experimental data, using curve fitting method.

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

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Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

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