Solubility of ThO2•xH2O(am) in the presence of gluconate

被引：15

作者：

Colas, E. ^{[1
]}

Grive, M. ^{[1
]}

Rojo, I. ^{[2
]}

Duro, L. ^{[1
]}

机构：

[1] Amphos 21, Barcelona 08019, Spain

[2] CTM Ctr Tecnol, Manresa 08242, Spain

来源：

RADIOCHIMICA ACTA | 2011年 / 99卷 / 05期

关键词：

Thorium(IV); Solubility; Gluconate; Complexation; ISOSACCHARINIC ACID; TETRAVALENT ACTINIDES; STABILITY-CONSTANTS; TH(IV) HYDROXIDE; HYDROUS OXIDE; COMPLEXATION; CARBONATE; URANIUM(VI); ALKALINE; EU(III);

D O I：

10.1524/ract.2011.1837

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Thorium complexation with gluconate has been studied from solubility experiments at gluconate concentrations between 10(-6) and 10(-1) mol/l, with pH(c) between 9 and 13 and I = 0.5 M (NaClO4). Solubility experiments indicate the formation of a 1:1 thorium:gluconate complex. The stability constant for this species, extrapolated to I = 0 by using the SIT (specific interaction theory), has been determined to be log(10)K(o) = -11.5 +/- 0.6 for the reaction: Th4+ + GH(4)(-) + 2H(2)O = Th(OH)(2)(GH(2))(-) + 4H(+) In the presence of ThO2 center dot xH(2)O, sorption of the organic ligand onto solid surface seems to limit thorium dissolution.

引用

页码：269 / 273

页数：5

共 29 条

[1] Complexing properties of α-isosaccharinate:: Stability constants, enthalpies and entropies of Th-complexation with uncertainty analysis [J].