Complexation of plutonium(IV) with fluoride at variable temperatures

被引：4

作者：

Xia, Y. ^{[1
]}

Rao, L. ^{[2
]}

Friese, J. I. ^{[1
]}

Moore, D. A. ^{[1
]}

Bachelor, P. P. ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

[2] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

来源：

RADIOCHIMICA ACTA | 2010年 / 98卷 / 02期

关键词：

Plutonium(IV); Fluoride; Complexation; Stability constants; Temperature effect; Solvent extraction; STABILITY-CONSTANTS; SULFATE; EXTRACTION; NITRATE; PU(IV);

D O I：

10.1524/ract.2010.1690

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complexation Of Pu(IV) With fluoride was Studied by solvent extraction at 25, 40 and 55 degrees C in 2.2 mol kg(-1) HClO4. The distribution ratio Of Pu(IV) between the organic and aqueous phases decreased a,, the concentration of fluoride was increased due to the formation of Pu(IV)-F complexes in the aqueous phase. Two complexes, PuF3+ and PuF22+, were identified under the conditions in this work and their stability constants at 25, 40 and 55 degrees C and I = 2.2 mol kg(-1) HClO4 were determined from the distribution data. The specific ion interaction approach (SIT) Was Used to extrapolate the constants to the state of infinite dilution. Data from this work indicate that the complexation Of Pu(IV) With fluoride is endothermic and entropy-driven. The complexation becomes stronger at higher temperatures.

引用

页码：65 / 69

页数：5

共 22 条

[1]

[Anonymous], 2001, CHEM THERMODYN

[2]

BAGAWDE SV, 1977, RADIOCHEM RADIOA LET, V31, P65

[3] COMPLEXING OF TETRAVALENT PLUTONIUM IN AQUEOUS-SOLUTIONS [J].