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ADSORPTION OF Pu(IV) ON POLISHED PLATINUM SURFACE

A.G. Samartseva

Abstract

With Pu(IV) concentration 10/sup -9/ M and hydrogen ion concentration 10/ sup -1/ to 10/sup -3/ M in HNO/sub 3/ solution, the Pu(IV) adsorption on platinum reaches 97 to 98%. For pH above 4 the Pu(IV) adsorption diminishes to st run. Concent 30% at pH = 7.8. The Pu(IV) adsorption process is irreversible in solutions with pH> 2.5. The 10/sup -4/ M concentrations of ammonium ions and La and Y ion do not effect Pu(IV) adsorption on Pt/sub 1/ while the identical concentrations of Zr(IV) strongly inhibit the adsorption process. The adsorption of Pu(IV) is greatly enhanced in solutions with H/sub 2/O/sub 2/ concentration of 10/sup -2/ M. (R.V.J.)

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Key concepts: Adsorption, Platinum, Chemistry, Ion, Inorganic chemistry, Ammonium, Nuclear chemistry, Physical chemistry