Oxidation of sulfite and thiosulfate anions on a porous carbon fiber anode

Anode stability of carbon felt VNG-30 and the kinetics of the anode oxidation of sodium sulfite and thiosulfate solutions (initial concentration: 10 g/l) on this material under different electrolysis conditions are investigated. It is established that BNG-30 is rather stable at the anode polarization up to ap1.8 V and can be used for the anode oxidation of sulfite and thiosulfate. Oxidation rate increases with an increase in the anode polarization and especially noticeably with a decrease in the concentration of ions under oxidation. It is shown that the addition of KBr (up to 10 g/l) causes a noticeable acceleration of sulfite oxidation and has only a weak effect on the process of thiosulfate oxidation.