Sorption Behavior of Pu on Fe, FeO, Fe₂O₃, and Fe₃O₄

The sorption behavior of Pu on Fe, FeO, Fe₂O₃ and Fe₃O₄ powder are studied with batch experiment at ambient temperature. Sorption experiments are performed under atmospheric and anae-robic conditions (in an argon glove box with an oxygen content of less than 5×10^-6). The experimental results show that the sorption ability of Pu on Fe, FeO, Fe₂O₃ and Fe₃O₄ powder is increased with increasing pH value(1.0~10.0) of the aqueous phase, and decreased with increasing carbonate ion concentration (4.0×10^-3 mol/L~1.0×10^-1 mol/L) in the aqueous phase. The oxygen concentration of the experimental conditions has less influence on the sorption of Pu on Fe, FeO, Fe₂O₃, and Fe₃O₄ powder. The sorption isotherms of Pu on Fe, FeO, Fe₂O₃, and Fe₃O₄ powder can be well described by the Freundlich’s equation.