Extraction of americium and europium with functionalized calixarenes from alkaline solutions

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• 作者：I. V. Smirnov ; E. S. Stepanova ; A. B. Drapailo ; V. I. Kalchenko
• 关键词：extraction ; americium ; europium ; alkaline solutions ; functionalized calixarenes
• 刊名：Radiochemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：58
• 期：1
• 页码：42-51
• 全文大小：364 KB
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• 作者单位：I. V. Smirnov (1) (2)
  E. S. Stepanova (1)
  A. B. Drapailo (3)
  V. I. Kalchenko (3)
  
  1. Khlopin Radium Institute, 2-i Murinskii pr. 28, St. Petersburg, 194021, Russia
  2. Ozersk Institute of Technology, pr. Pobedy 48, Ozersk, Chelyabinsk oblast, 456783, Russia
  3. Institute of Organic Chemistry, National Academy of Sciences of Ukraine, vul. Murmans’ka 5, Kyiv, 02660, Ukraine
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nuclear Chemistry
  Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3288

文摘

Extraction of 241Am and 152Eu from alkaline carbonate solutions with solutions of functionalized calix[4]arenes and their nonmacrocyclic analogs in m-nitrobenzotrifluoride was studied. The dependence of the distribution ratios and separation factors of the radionuclides on pH of the aqueous phase in the interval from 9.8 to 13.5 and on the position and electronic nature of functional groups (alkyl, pyridine, phosphoryl) in the calixarene core was examined. The composition of the extractable solvates of americium and europium with functionalized calix[4]arenes was determined. From both alkaline and nitric acid solutions, calixarenes extract americium more efficiently than their nonmacrocyclic analogs do. The calix[4]arene with the pyridine functional group exhibits the highest selectivity, with the Am/Eu separation factor exceeding 3. Calix[4]arenebis-(methanediphosphonates) extract europium and americium from both alkaline and nitric acid solutions with similar magnitude of the cooperative effect.