Extraction properties of tetramethylmalonamide resin for actinide ions

Shimada, Asako ; Nash, K.*; Alexandratos, S.*; Yang, Y.*

The extraction properties of tetramethylmalonamide (TMMA) resin have been studied for the separation of actinides from radioactive waste solutions. High weight distribution ratios (w) of Th and U were obtained from HNO $_{3}$ and HCl solutions in the concentration range 0.01 to 10 M. w of Am was over 60 from HNO $_{3}$ solutions in that concentration range, however, it decreased to 5 from 0.01 to 1 M HCl solutions. The influence of co-existing metal ions on w of Am from 3 M HNO $_{3}$ solution was studied. w of Am was decreased with an increasing Fe $^{3+}$ concentration due to the competition. On the other hand, w of Am was slightly increased in the presence of Ni $^{2+}$ . In order to evaluate stripping agent, the influence of some organic acids and chelate agents on w of Th and U were investigated.

Language	:	English
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Meeting title	:	242nd American Chemical Society National Meeting & Exposition
Held date	:	2011/08
Location (city)	:	Denver
Location (country)	:	U.S.A.
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Registration No. : BB20120040
JAEA Abstracts No. :
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