Solubility of uranium(IV) hydrous oxide in high pH solution under reducing condition

被引：15

作者：

Fujiwara, K

Yamana, H

Fujii, T

Kawamoto, K

Sasaki, T

Moriyama, H

机构：

[1] Kyoto Univ, Dept Nucl Engn, Sakyo Ku, Kyoto 6068501, Japan

[2] Kyoto Univ, Res Reactor Inst, Kumatori, Osaka 5900494, Japan

来源：

RADIOCHIMICA ACTA | 2005年 / 93卷 / 06期

关键词：

uranium; tetravalent; solubility; hydrolysis constant; alkaline solution;

D O I：

10.1524/ract.93.6.347.65643

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The solubility of uranium(IV) hydrous oxide was measured at 25 degrees C in NaClO4 solution containing Na2S2O4 as a reducing agent in the pH range from 12 to 14. The experiment was carried out from oversaturation at I = 0.5, 1.0 and 2.0 mol/dm(3) (M). The solubility data were analyzed to obtain the hydrolysis constants (beta(m)) of U(OH)(m) ((4-m)). By taking the specific ion interaction theory (SIT) for ionic strength corrections and by using the solubility product log K(sp)degrees = -53.93 +/- 0.20, the hydrolysis constants at I = 0, log beta(5)degrees < 48.10 and log beta(6)degrees = 48.95 +/- 1.01, were determined together with the ion interaction coefficients of U(OH)(5)(-) and U(OH)(6)(2-).

引用

页码：347 / 350

页数：4

共 18 条

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Baes C.F., 1976, HYDROLYSIS CATIONS

[2] Determination of uranium(IV) hydrolysis constants and solubility product of UO2•xH2O [J].