Solid-phase extraction of plutonium(IV) an americium(III) using N-benzoylphenylhydroxylamine and its derivatives

The recovery and separation of plutonium(IV) and americium(III) by solid-phase extraction (SPE) on alkylated silica gel S16 modified with N -benzoylphenylhydroxylamine (BPHA) and with its derivatives was studied. BPHA was modified by introducing into the p -position of the phenyl ring of electronactive substituents that differ in their hydrophobicity: CH 3 , Ph, Cl, F, and NO 2 . The SPE of plutonium(IV) and americium(III) was studied in the range of acidities from pH 8 to 1 M HNO 3 . The recovery and separation of these elements was shown to depend on the nature of the substituent, aqueous acidity, and the preparation of S16 to SPE experiments.