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

Published online by Cambridge University Press:  03 September 2012

Takayuki Amaya ,
Tamotsu Chiba ,
Kazunori Suzuki ,
Chie Oda ,
Hideki Yoshikawa  and
Mikazu Yui
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 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 751
Copyright
Copyright © Materials Research Society 1997

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References

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