Fig. 1. Structure of NTAamide(C8) extractant

Fig. 2. At different oxalic acid concentrations ((a) [HNO₃]=0.5 mol·L^-1) and different nitric acid concentrations((b) [H₂C₂O₄]=0.1 mol·L^-1), washing rate of U(Ⅵ), Pu(Ⅳ), Zr(Ⅳ) in the loaded organic phase (color online)

Fig. 3. Flowchart of technetium separation and extraction process

Fig. 4. Concentration distributions of ions in instantaneous of organic phase (a) and aqueous phase (b)

Fig. 5. Concentration distributions of each ion in the organic phase and aqueous phase of each sample(a) Tc(Ⅶ), (b) Pu(Ⅳ), (c) U(VI), Zr(IV), Sr(II), Cs(I), Ru(III)

Fig. 6. Concentration distributions of technetium in the two phases of the effluents (a) and each stage (b)