Affecting factors and kinetics of dye wastewater treatment by electro-catalytic oxidation process
电催化氧化法处理染料废水的影响因素及动力学

Under the condition of the coating of titanium plate as anode,graphite plate as cathode and Fe2O3/γ-Al2O3 as heterogeneous catalyst,COD removal effect and its affecting factors in dye-wastewater of acid red by electro-heterogeneous catalytic oxidation system were investigated.Experimental conditions and the degradation mechanism of COD were discussed.The result shows that cell voltage,pH,airflow rate and electrode distance had a significant impact on COD removal.The best COD removal was 64.5% with cell voltage of 20 V,pH of 4,airflow rate of 0.24 m3/h and electrode distance of 3 cm.The degradation of COD approximation order kinetics equation: ln(C0/C)=0.0034t+0.719.It is capable of mineralizing organic contaminants into H2O,CO2 and other inorganics in the electro-heterogeneous catalytic oxidation system.