Study Of Synthesise Of α-Fe₂O₃ Composite And Its Properties Of Photo-assisted Wet Oxidation Degradation Dye Wastewater

Wet catalytic oxidation technology is playing an important role in wastewater treatment now, but due to the operating conditions are too harsh and restrict its use. therefore, this artical is mainly about the preparation of different morphologies α-Fe₂O₃ by hydrothermal method and doping α-Fe₂O₃ with different metal, UV-assisted the catalyst modified degrade dye wastewater simulation and actual industrial wastewater to study the optimum conditions for the preparation and degradation and the kinetics of wastewater degradation were also studied.1、By using Fe （NO₃）₃·9H₂O as raw materials, PVP as surfactant,α-Fe₂O₃ was prepared by hydrothermal method, compare the catalytic activity of different morphology a-Fe₂O₃,change the water thermal reaction temperature, reaction time, the structure and morphology characterization of the α-Fe₂O₃ by utilizing the means such as XRD, SEM, EDS,FT-IR.2、By impregnation with a metal ion to be doped α-Fe₂O₃, compare the catalytic activity of different metal ion doping, the results show that the use of dipping metal ions can be loaded onto α-Fe₂O₃, and Al doped α-Fe₂O₃ have the highest catalytic activity, for Al α-Fe₂O₃ preparation process was optimized to obtain a loading of 40% Al, calcination temperature 700℃, calcination time 2h.3、Optimum conditions research on the degradation of dye wastewater with Al/ α-Fe₂O₃ under UV-assisted catalytic wet oxidation, the optimum conditions for the single factor and orthogonal experiments were as follows:reaction time 3h, the amount of catalyst is 0.1g, the amount of 30% H2O2 is 0.6mL, intial pH 4, the reaction temperature is 70℃. On this basis, the kinetics study on Al/α-Fe₂O₃ degrade acid red GR,get this degradation process in line with the pseudo-first-order kinetics equation, first-order reaction rate constant K was 2.8228×103, the activation energy △E of 17.889 kJ/mol。 The apparent kinetic equation was:In（Ct/Co）=-2.8228 × 103 × e -17.889×103/RT × CA0.5366 × CB0.98845 × CC-2.0245 × t4. Study Al/α-Fe₂O₃ catalyst degradation of industrial wastewater actual law, the results of the catalyst of the wastewater treatment better.