(a) By considering Fig. 27.9, suggest a method for the separation of Am from U, Np and Pu.

(b) What would you expect to happen when a solution of NpO₂(ClO₄)₂ in 1Μ HClO₄ is shaken with Zn amalgam and the resulting liquid decanted from the amalgam and aerated?

Figure 27.9.

Transcribed Image Text:

[UO₂]²+ [NpO6]5- [PuO₂]²+ [AmO₂]²+ +0.06 +2.0 +1.02 +1.60 [UO₂]+ +0.33 [NpO₂]²+ [PuO₂]* +1.03 +1.03 [AmO₂]+ +0.62 +1.24 +1.04 +1.68 +0.82 [NpO₂]* +0.94 Pu4+ Ĵ Am4+ -0.61 +1.72 +1.01 +2.62 U³+ +0.64 Pu³+ -1.80 Np4+ Am ³+ -2.03 -2.05 U +0.15 Pu Am 3+ Np³+ -1.86 Np