The novel extractants, bis-triamides: Synthesis and selective extraction of thorium(IV) from nitric acid media
The novel extractants, bis-triamides: Synthesis and selective extraction of thorium(IV) from nitric acid media
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新型萃取剂双三酰胺：从硝酸介质中合成和选择性萃取钍 (IV)
DOI：
10.1016/j.seppur.2017.07.003
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发表时间：
2017-11
影响因子：
8.6
通讯作者：
Xia Chuanqin
中科院分区：
文献类型：
--
作者：
Li Long;Pan Ning;Guo Xinghua;Ding Jie;Wu Rulei;Ding Songdong;Wang Ruibing;Jin Yongdong;Huang Chao;Xia Chuanqin
通过合理设计、合成和表征了四种新型软硬给体双三胺萃取剂，用于从不同稀释剂的硝酸介质中高效地萃取Th(IV)。结果表明，在硝基苯中，Th在L2和L3中的分配比大于L1和L4。进一步的研究包括酸度、萃取剂浓度、Th(IV)萃取量的测定和温度对Th(IV)分配比的影响仅限于L2和L3。结果表明，在金属/萃取剂比为1：2的条件下，Th(IV)以萃合物的形式被萃取到有机相中，L2和L3对Th(IV)的最大萃取量分别为995 mg/L和1085 mg/L。测定了与萃取过程相关的热力学参数(ΔH、ΔS和ΔG)，结果表明，在室温下，萃取过程为吸热自发过程。在0.1~3.0M HNO_3溶液中，L3对Th(IV)的选择性高于U(VI)、Am(III)、Eu(III)和Sr(II)。反萃实验表明，以2.0MNa2CO3为反萃剂对Th(IV)的反萃效果最好，第三级反萃率可达99%。
Four novel soft-hard donor bis-triamide extractants were rationally designed, synthesized and characterized for the highly efficient extraction of Th(IV) from nitric acid medium in different diluents. The results indicate thatL2andL3exhibit higher distribution ratio values for thorium than those ofL1andL4in nitrobenzene. Further studies including the effects of acidity, the concentration of extractant, the determination of extraction capacity of Th(IV) and the temperature on the distribution ratios of Th(IV) were limited toL2andL3. The results reveal that Th(IV) is extracted into the organic phase as the extracted complex with a metal/extractant ratio of 1: 2. The maximum extraction capacity of Th(IV) withL2andL3is 995 mg/L and 1085 mg/L, respectively. The thermodynamic parameters (ΔH, ΔSand ΔG) associated with the extraction process were determined, and the results show that the process is endothermic and spontaneous at room temperature. Moreover,L3shows the highest selectivity for Th(IV) over U(VI), Am(III), Eu(III) and Sr(II) in 0.1–3.0 M HNO3solution. Stripping experiments indicate that the best stripping performance for Th(IV) is achieved by using 2.0 M Na2CO3as a stripping agent and its stripping percentages can reach 99% by the third stage.
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影响因子：
2
作者：
A. Suresh;S. Subramaniam;T. Srinivasan;P. Rao
通讯作者：
A. Suresh;S. Subramaniam;T. Srinivasan;P. Rao
使用基于吡啶基吡唑的四齿配体选择性萃取镅（III）而不是铕（III）：实验和理论研究。
影响因子：
4.6
作者：
Huang, Huang;Hu, Xiaoyang;Wang, Zhipeng;Li, Shimeng
通讯作者：
Li, Shimeng
影响因子：
2
作者：
P. Pathak;D. R. Prabhu;V. Manchanda
通讯作者：
P. Pathak;D. R. Prabhu;V. Manchanda
影响因子：
4.2
作者：
P. Pathak;D. R. Prabhu;A. S. Kanekar;P. Β. Ruikar;A. Bhattacharyya;P. Mohapatra;V. Manchanda
通讯作者：
P. Pathak;D. R. Prabhu;A. S. Kanekar;P. Β. Ruikar;A. Bhattacharyya;P. Mohapatra;V. Manchanda
影响因子：
9
作者：
Locatelli, Giorgio;Mancini, Mauro;Todeschini, Nicola
通讯作者：
Todeschini, Nicola