Characterization of the extraction properties of the selected extraction sorbents TRU, TEVA, UTEVA and DIPHONIX

Quantification of curium isotopes in environmental samples: drawbacks, speciation and specific tracer

“…This type of behavior, where a heavier neighboring element has a lower retention factor than its lighter neighbor, is also observed in the lanthanide series between Eu (III) and Gd (III) which are isoelectronic to Am (III) and Cm (III), respectively. This separation factor was then confirmed by column studies and other publications [24].…”

“…A slight trend of higher Am recoveries is nonetheless observed. Since both actinides are not retained over the entire HCl concentration range [24,25], this difference is obviously due to a difference between retention factors during the sample loading in 1 M HNO3. This spéciation computation study points up a noticeable différence in the hydrolysis constants of Am and Cm.…”

Development of a numerical simulation method for modelling column breakthrough from extraction chromatography resins

“…Batch experiments varying the HNO 3 concentration over the range 7 M-9 M showed opposing relationships between k D and HNO 3 concentration for the two analytes. The effect of temperature on k D has not been investigated in this study although Janda et al 13 showed UTEVA extraction efficiency to be significantly reduced when performing sorption experiments at temperatures outside the typical laboratory range.…”