Sorption Behavior of Pu on Granite

The sorption behavior of Pu on granite is studied with batch experiment and 1 mol/L HClO_4 is used to dissolve the Pu sorped on granite at ambient temperature.Sorption experiments are performed under atmospheric and anaerobic conditions(in an argon glove box with an oxygen content of less than 5×10~(-6)mol·mol~(-1)).Experimental results show that the sorption ability of Pu on granite is increased with increasing pH value(3.0~10.0) 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 condition is less influence on the sorption of Pu on granite.The sorption behavior of Pu on granite are irreversible.The sorption isotherms of Pu on granite can be well described by the Freundlich's equation.