The Study on the Electrocatalytic Treatment of Dye Wastewater by ACF Cathode

By using ACF as the cathode, acid scarlet 3R as simulated wastewater, the experiment researches into the effect of current density, aeration, electrolyte concentration and the initial pH value on the color removal of wastewater. The results showed that: ACF cathode has a strong adsorption capacity. Oxygen is reduced to H2O2 and other oxidizing substances H2O2 on the cathode surface. Therefore, it has a strong degradation capacity to dye, which is far better than that of the stainless steel cathode; lower operating current density helps reduce processing costs; higher electrolyte concentration and aeration is not necessarily better, which follows certain rules; the treatment is effected greatly by the initial pH, and the effect of decolorization in the acidic conditions is better than that in alkaline conditions. When the current density is 6 Am/cm2, electrolyte concentration is 0.04 mol∙L−1, aeration capacity is 0.2 m3/h, initial pH is 3.5 and the time of treatment is 70 min, the decolorization rate of wastewater is 95.30%.