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

被引：13
|
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
收藏
页码：347 / 350
页数：4
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