FLOW-COULOMETRY OF URANIUM, NEPTUNIUM AND PLUTONIUM IONS WITH MULTI-STEP COLUMN ELECTRODES

Abstract

The overall feature of the reduction-oxidation behavior of U, Np or Pu ions in acidic aqueous solutions was investigated by flow-coulometry with multi-step column electrodes. Redox potentials, number of electrons involved in the electrode processes, and reversibilities of the processes were determined and the species participating in the reactions were discussed. Methods for the rapid preparation of the ion of a desired oxidation state and for the determination and the speciation of ions were developed.