14 SEPARATION TECHNIQUES United States Environmental
Separation Techniques. MARLAP 14 8 JULY 2004 Plutonium exhibits redox behavior unmatched in the periodic table. It is possible to prepare solutions of plutonium ions with appreciable concentrations of four oxidation states, +3, +4, (V), and (VI), as Pu+3, Pu+4, PuO. 2 +1, and PuO. 2 +2, respectively.