Coordination characteristics of trivalent lanthanides and actinides in molten hydrate salts of Ca(NO3)2 and CaCl2
Coordination characteristics of trivalent lanthanides and actinides in molten hydrate salts of Ca(NO3)2 and CaCl2
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Ca(NO3)2和CaCl2熔融水合物盐中三价镧系元素和锕系元素的配位特征
DOI：
10.1007/s10967-010-0907-8
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
H. Yamana
中科院分区：
文献类型：
--
作者：
T. Fujii;G. Okude;A. Uehara;S. Sekimoto;H. Hayashi;M. Akabori;K. Minato;H. Yamana
用放射化学方法研究了Ce（III）、Am（III）、Cm（III）在磷酸三丁酯溶液与熔融CaCl 2·RH 2 O和熔融CaNO 3·RH 2 O之间的分配行为。在Ca（NO_3）_2·RH_2O体系中，Ce和Cm对Am的最大分离因子分别为12（Ce/Am）和1.7（Cm/Am）。这些元素的分配比例随着水活度的降低而增加，在缺水区的可提取性比在富水区的可提取性更不敏感。这一趋势与Nd（III）在水合物中的电子吸收光谱中观察到的配位环境变化相类似。
Distribution behavior of Ce(III), Am(III), and Cm(III) between tri-n-butyl phosphate solution and molten calcium nitrate hydrate Ca(NO3)2·RH2O or molten calcium chloride hydrate CaCl2·RH2O was studied radiochemically. In Ca(NO3)2·RH2O systems, maximum separation factors of Ce and Cm to Am were observed to be 12 (Ce/Am) and 1.7 (Cm/Am). The distribution ratios of these elements increased with the decrease of water activity in the hydrates, and the extractabilities at the water deficient region was less sensitive compared to those at the water abundant region. This trend was similar to the coordination circumstance change observed in electronic absorption spectra of Nd(III) in the hydrates.