Sorption of Pu(IV) in the polymeric colloidal form on rock typical of Mayak Production Association area

Solid-phase extraction of plutonium in various oxidation states from simulated groundwater using N-benzoylphenylhydroxylamine

“…As one can see, the SPE behavior of plutonium in various oxidation states differs rather considerably. The polymerized forms of Pu(IV) are sorbed rather effectively during passing the first 50 mL of the solution, that is due to a high sorption affinity of polymeric plutonium macromolecules [ 11 – 13 ]. Further passing the solution results in an increase of plutonium concentration in the effluent that may be attributed to the reduction of Pu(IV) to Pu(III) under the action of BPHA, as reported in [ 8 ], or to plutonium disproportionation [ 14 ]: …”

Particulate Phases Possibly Conveyed from Nuclear Waste Repositories by Groundwater

“…The latter exhibit a predisposition for getting bound to the rocks surface, a behaviour which with increasing particles dimension, becomes more and more obvious. It was found, for instance, that when the particles dimensions exceed 220 nm, Pu(IV) is virtually quantitatively sorbed on the rock surface (Perevalov et al, 2009). At the same time, equilibrium distribution of Pu(IV) polymers depending on the total Pu(IV) concentration in the solution was analyzed theoretically by Kulyako et al (2008).…”