Radium separation through complexation by aqueous crown ethers and extraction by dinonylnaphthalenesulfonic acid
Radium separation through complexation by aqueous crown ethers and extraction by dinonylnaphthalenesulfonic acid
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DOI：
10.1016/s1381-5148(97)00097-7
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发表时间：
1998-11-01
影响因子：
5.1
通讯作者：
Cheng, YD
中科院分区：
文献类型：
--
作者：
Chiarizia, R;Horwitz, EP;Cheng, YD
本文研究了二壬基萘磺酸（HDNNS）的二甲苯溶液从含不同水溶性冠醚配体（15-冠-6（15 C5）、18-冠-6（18 C6）和21-冠-7（21 C7））的盐酸溶液中萃取碱土金属离子的行为。萃取结果表明，在水相中冠醚的存在下，HDNNS对较大的碱土金属阳离子的萃取具有强烈的协同作用。内组-IIa阳离子的分离已经获得了有希望的结果与每三个冠醚的调查。在许多条件下，镭-钙对的分离因子至少为10（2），而镭-钡-锶系列的分离因子要低得多。根据萃取数据，讨论了在开发用于镭分离富集的萃取色谱树脂时可能存在的问题。(C)1998 Elsevier Science B. V.保留所有权利。
The extraction of alkaline earth cations by xylene solutions of dinonylnaphthalenesulfonic acid (HDNNS) from aqueous hydrochloric acid solutions containing various aqueous-soluble unsubstituted crown ether ligands (15-crown-6 (15C5), 18-crown-6 (18C6) and 21-crown-7 (21C7)) has been investigated. The extraction results indicate that the extraction of the larger alkaline earth cations by HDNNS is strongly synergized by the presence of the crown ethers in the aqueous phase. Promising results for intra-Group-IIa cation separations have been obtained with each of the three crown ethers investigated. Separation factors for the radium-calcium couple of at least 10(2) are obtained under a number of conditions, while the separation factors within the radium-barium-strontium series are much lower. Possible problems in developing an extraction chromatographic resin for radium separation and preconcentration based on the extraction data are discussed. (C) 1998 Elsevier Science B.V. All rights reserved.