Modifier-free separation of trivalent actinides and lanthanides from fast reactor simulated high-level liquid waste using N,N-di-octyl-2-hydroxyacetamide

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 314; no. 3; pp. 2365 - 2375
• Main Authors: Prathibha, T., Kumaresan, R., Nayak, P. K., Venkatesan, K. A., Subramanian, G. G. S., Rajeswari, S., Kalaiyarasu, T., Karunakaran, R., Antony, M. P.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2017; Springer; Springer Nature B.V
• Subjects: Actinides; Chemistry; Chemistry and Materials Science; Cytokinins; Diagnostic Radiology; Dodecane; Hadrons; Heavy Ions; Inorganic Chemistry; Ions; Lanthanides; Level (quantity); Metal ions; Nuclear Chemistry; Nuclear energy; Nuclear fuel cycle; Nuclear Physics; Nuclear reactors; Physical Chemistry; Hydroxyacetamide; Americium; High-level liquid waste; Solvent extraction; Diglycolamide
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-017-5528-z

The extraction behaviour of Am(III) and other metal ions present in the fast reactor simulated high- level liquid waste (FR-SHLLW) was studied using a modifier-free solvent phase composed of N,N-di-octyl-2-hydroxyacetamide (DOHyA) in n-dodecane. Quantitative extraction of Am(III) was achieved with the co-extraction of all lanthanides, Y(III) and Mo(VI) in the first five stages of a 20-stage mixer-settler. During the stripping run with 0.5 M HNO 3 , Am(III), Ln(III) and Y(III) were quantitatively transferred to the aqueous product in three stages. The other extracted metal ions were retained in organic phase. The results showed that the extraction performance of DOHyA was superior to other amide extractant systems reported in the literature.