Influence of Temperature on the Extraction of Pu(IV) by Tri-n-butyl Phosphate from Acidic Nitrate Solutions

被引：4
|
作者：
Brown, M. Alex
Tkac, Peter
Paulenova, Alena [1 ]
Vandegrift, George F. [2 ]
机构：
[1] Oregon State Univ, Ctr Radiat, Dept Nucl Engn & Radiat Hlth Phys, Corvallis, OR 97331 USA
[2] Argonne Natl Lab, Argonne, IL 60439 USA
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2010年 / 45卷 / 01期
关键词：
plutonium; TBP; nitrate; solvent extraction; Van't Hoff; PUREX; CHLORIDE COMPLEXES; NITRIC-ACID; PLUTONIUM(IV); STABILITY;
D O I：
10.1080/01496390903402133
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The influence of temperature on the extraction of Pu(IV) into 30 vol.% tri-n-butyl phosphate in n-dodecane from acidic nitrate solutions has been investigated at temperatures ranging from T=(294 to 313) K. Temperature was found to decrease the distribution of Pu(IV). Three species of plutonium were considered present in the aqueous solution: Pu4+, [image omitted], and [image omitted]. The enthalpy and entropy of the extraction, calculated using Van't Hoff plots, are -60.4 +/- 3.34kJ center dot mol-1 and -120 +/- 10.6J center dot mol-1 center dot K-1, respectively.
引用
收藏
页码：50 / 57
页数：8
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