Chromatographic separation of americium from europium using bis-2,6-(5,6,7,8-tetrahydro-5,9,9-trimethyl-5,8-methano-1,2,4-benzotriazin-3-yl) pyridine

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 314; no. 1; pp. 371 - 376
• Main Authors: Tevepaugh, Kayron N., Coonce, Janet, Tai, Serene, Delmau, Lætitia H., Carrick, Jesse D., Ensor, Dale D.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.10.2017; Springer; Springer Nature B.V
• Subjects: Alkaloids; Americium; Bis-1,2,4-triazinyl pyridines; CA-BTP; Chemistry; Chemistry and Materials Science; Chromatography; Diagnostic Radiology; Europium; Extraction chromatography; Hadrons; Heavy Ions; Inorganic Chemistry; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Lanthanide-actinide separations; Minor actinides; Nuclear Chemistry; Nuclear energy; Nuclear Physics; Physical Chemistry; Pyridine; RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Rare earth metal compounds; Separation; Solvent extraction; CA-BTP; Bis-1,2,4-triazinyl pyridines; Minor actinides; Extraction chromatography; Lanthanide-actinide separations
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-017-5365-0

The separation of americium(III) from europium(III) was achieved utilizing a bis -2,6-(5,6,7,8-tetrahydro-5,9,9-trimethyl-5,8-methano-1,2,4-benzotriazin-3-yl) pyridine (CA-BTP) chromatographic resin. The extraction chromatographic materials were prepared using various concentrations of CA-BTP. This new, hydrolytically stable extractant was impregnated on an inert polymeric support at 40% loading. The uptake of Am(III) and Eu(III) by this material from 0.1 to 4.0 M aqueous HNO 3 solutions was measured. The resulting dry weight distribution ratios, D w , indicated a strong preference for Am(III) with little affinity for Eu(III). These results are similar to recently reported solvent extraction studies indicating a maximum uptake of Am(III) in the 0.5–1.0 M HNO 3 range. The resin preparation, performance, and characterization of the Am/Eu separation are reported herein.