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Behavior of Ru and Pd under conditions of electrochemical oxidative dissolution in HNO3 with Ag(II) was studied. Finely divided Ru metal can be readily oxidized and distilled off as RuO4, with subsequent absorption in an appropriate solvent, within 3–6 h. The process rate is limited by the RuO4 transport through the solution/gas interface and can be controlled by varying the air flow rate through...
The current efficiency of Ag(II) formation in the course of electrochemical oxidative dissolution of PuO2 was determined. It approaches 72% at the anodic potentials from 1.9 to 2.1 V (vs. SHE) and the anodic current densities of 0.006-0.013 A cm-2. The behavior of Ag(II) in 4 M HNO3 at 8, 25, and 40°C was studied. The reaction of Ag(II) with water can be described by the equation d[Ag(II)]/dt = k...