期刊
RADIOCHIMICA ACTA
卷 94, 期 6-7, 页码 307-312出版社
WALTER DE GRUYTER GMBH
DOI: 10.1524/ract.2006.94.6.307
关键词
TODGA; actinides; thermodynamics; extraction constant
The effect of temperature on the extraction behaviour of Am(III), Pu(IV) and U(VI) from nitric acid medium was studied employing N, N, N', N'-tetraoctyl diglycolamide (TODGA) in n-dodecane. The two-phase equilibrium constants (log K'(ex)) were calculated and compared with those of other extractants proposed for actinide partitioning, viz. octyl-(phenyl)-N, N-diisobutylcarbamoylmethyl phosphine oxide (CMPO) and N, N, N', N'-dimethyl dibutyl tetradecyl malonamide (DMDBTDMA). Thermodynamic parameters, viz. A G, A H and AS for the extraction of actinides by TODGA were also compared with those of CMPO and DMDBTDMA. These studies indicate that the extraction processes of Am(III) and U(VI) are enthalpy driven whereas entropy factor counteracts the extraction. However, in the case of Pu(IV), the extraction process is enthalpy as well as entropy favoured. Role of diluent on the loading of Nd(III) in 0.1 M TODGA has also been investigated.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据