Comparative Study of the Complexation of Uranium (VI) with Oxydiacetic Acid and its Amide Derivatives.

Rao, L. ; Tian, G.

Technical Information Center Oak Ridge Tennessee

关键词: Actinide complexes;    Amides;    Aqueous solutions;    Actinides;    Degradation;   

RP-ID  :  DE2006862326

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

There has been significant interest in recent years in the studies of alkyl-substituted amides as extractants for actinide separation because the products of radiolytic and hydrolytic degradation of amides are lessdetrimental to separation processes than those of organophosphorus compounds traditionally used in actinide separations. Stripping of actinides from the amide-containing organic solvents is relatively easy.In addition, the amide ligands are completely incinerable so that the amount of secondary wastes generated in nuclear waste treatment could besignificantly reduced. One group of alkyl-substituted oxa-diamides have been shown to be promising in the separation of actinides from nuclear wastes. For example, tetraoctyl-3-oxa-glutaramide1 and tetraisobutyl-oxa-glutaramide form actinide complexes that can be effectively extracted from nitric acid solutions. To understand the thermodynamic principles governing the complexation of actinides with oxa-diamides, we have studied the complexation of U(VI) with dimethyl-3-oxa-glutaramic acid (DMOGA) and tetramethyl-3- oxa-glutaramide(TMOGA) in aqueous solutions, in comparison with oxydiacetic acid (ODA).