Extraction of Americium with Substituted Calix[4]Arenes from Alkaline Solutions

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• 作者：I.V. Smirnov^a ; ^b ; ^c ; ^{igor_smirnov@khlopin.ru} ; E.S. Stepanova^a ; ^b
• 关键词：extraction ; americium ; europium ; alkaline solutions ; functionalized calix- and thiacalixarenes
• 刊名：Procedia Chemistry
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：21
• 期：Complete
• 页码：203-210
• 全文大小：347 K
• 卷排序：21

文摘

Extraction of 241Am and 152Eu from carbonate-alkaline medias with solutions of functionalized calix[4]arenes and their nonmacrocyclic analogs in m-nitrobenzotrifluoride was studied. The dependencies of the Am distribution ratios on pH of the aqueous phase in the range 10 -13.5 and on the position and nature of functional groups in the calixarene core were examined. The composition of extractable solvates of americium with functionalized calix[4]arenes was determined. Thiacalixarenes extract americium more efficiently from alkaline solutions, as compared to calixarenes, demonstrating higher Am/Eu separation factor. Functionalization of the calixarenes improves the Am extraction efficiency and Am/Eu separation factor as well. In the case of thiacalixarenes, functionalization considerably decreases the extraction efficiency and selectivity.