期刊
SOLVENT EXTRACTION AND ION EXCHANGE
卷 29, 期 1, 页码 72-85出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/07366299.2011.539127
关键词
Americium(III); Europium(III); N; N; N'; N'-tetraoctyl-3-oxapentane-1; 5-diamide (TODGA); solvent extraction; thermodynamic parameters
Thermodynamic parameters (G, H, and S) for the extraction of trivalent f-elements, M(III) (M = Am, Eu), with N,N,N',N'-tetraoctyl-3-oxapentane-1,5-diamide (TODGA) were determined in nitric acid/n-dodecane extraction system. The extraction of M(III) with TODGA was more exothermic than those with octyl(phenyl)-N,N-diisobutylcarbamoylmethyl phosphine oxide (CMPO) and dihexyl-N,N-diethylcarbamoylmethyl phosphonate (DHDECMP). The difference in H between the extractants was attributed to the difference in the binding mode between them, i.e. tridentate (TODGA) and bidentate (CMPO and DHDECMP). In addition, from the results of luminescence lifetime measurement, it was found that the inner-sphere of extracted Eu(III) was dehydrated completely, and occupied by TODGA and/or NO3-.
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