Abstract
Abstract
The simulated azo dye waste-water was treated by Catalytic Wet Oxidation. The catalyst was prepared by impregnation method, and FSC (main component: γ-Al2O3) was used as the catalyst carrier, and 6wt%Cu, Fe, Pd and La were added. The catalyst was dynamically impregnated at 35 °C for 8 h, dried at 110 °C for 10 h, and roasted at 450 °C for 3h to prepare the supported catalyst. Based on the decolorization rate of treated waste-water, the effect of component composition on catalyst performance was investigated. In the CWAO treatment of waste-water, the pH of the treated effluent first decreased and then increased with the extension of reaction time; with the extension of reaction time, organic matter degrades continuously, the absorbance of waste-water decreases and the decolorization rate increases. Cu-Fe-Pd-La/FSC (ratio 0.75:0.75:1.5:3) has the best treatment effect; the metal dissolution concentration of the waste-water increases with the reaction time. Cu and Al are relatively stable, and the dissolution concentration in treated effluent is between 0.5 and 3.0 mg/L. The results showed that the Cu-Fe-Pd-La/FSC catalyst composed of Cu: Fe: Pd: La=1:1:1:3 had good catalytic activity and stability.