Abstract
Application of response surface methodology with central composite design to evaluate Uranium (VI) extraction from acidic medium by tri-n-butyl phosphate (TBP) solution into Ionic liquids has been studied. At low acidic solution i.e. at 0.01 M HNO3 the enhancement in distribution ratio DU in [EMIM][TF2N], [BMIM][TF2N], [Trihexyl tetradecyl phosphonium][TF2N] compared to dodecane is ∼ 347, 260 and 82 times and to TBP it is ∼ 300, 225 and 70 times respectively. Percent extraction (% E) of uranium into [EMIM][TF2N] is found to be highest 93% compared to other ionic liquids. The RSM with two-level-two-full factorial CCD was employed to predict the statistical model which relates the TBP composition and pH to the DU with (R2 = 98.6%). The model equation is tested for its suitability by analysis of variance (ANOVA) and it is found to be in good agreement with the experimental data.
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