LAUSR

A strongly hydrophobic phosphonium ionic liquid, trihexyltet radecylphosphonium bis(trifluoromethanesulfonyl)imide ([P66614][NTf2]) was employed as the diluent for the extraction behavior of Am(III) using N,N-dihexyl-2-hydroxyacetamide(DHHy) as extractant. The extractibility of americium(III) in [P66614][NTf2] phase was measured as a function of various parameters such as aqueous phase acidity (0.1–8 M), extractant concentration (0.01–0.15 M), equilibration time (5–120 min) and temperature (298–333 K). The extraction performance observed in DHHy/[P66614][NTf2] was compared with those observed in N,N-dihexyloctamide (DHOA) in [P66614][NTf2] and DHHy in other diluents such as [C4mim][NTf2] and n-dodecane. The effect of temperature on DAm(III) in ionic liquid system and recovery of Am(III) from the loaded phase were ascertained in detail.