Treatment Of Simulated Black Wastwcater By Eombination Of Voltage Pusled Discharge And Fe/Cu Co-doped TiO₂

This article take the high pressure mercury lamp as the stimulation source, The organic contaminant, REACTIVE Black 5 (RB5) was degraded by Fe/Cu co-doped TiO2 nano-particles under mercury lamp. In the present study, the combined effects of Fe/Cu doping amount, calcination temperature and calcination time on catalyst activity were investigated, and through quadratic regression general rotation design, Using First-level dynamics to research the density of Black 5 change along with time, has obtained three Yuan quadratic equations, carries on the plan solution to the equation the optimal condition for preparing the catalyst was obtained as follows: calcination time,3.55h; calcination temperature,453℃; Cu doping amount,1.89%; Fe doping amount,1.62%.The TiO2 coordination impulsive discharge which prepares the above condition under to simulated the active black waste water to carry on processing, had considered the electric appliance parameter, the solution parameter, the catalyst joined to activeness black wastewater disposal influence, and has carried on the synopsis determination to the intermediary product.Draws the main conclusion to be as follows:(1) Doping's TiO2 to the active black photochemical catalysis degradation reaction is the first-level response, active black degeneration decolorization speed constant k is approximate for the active black solution initial density.(2) Had considered Fe, the Cu doping quantity, the calcining heat as well as the calcine time joint action to this catalyst active influence, and uses two return general revolving unitized design, obtains prepares this catalyst the optimum condition for the calcine time is 3.55h, the calcining heat for 453℃, the copper doping quantity is 1.89%, the hard doping quantity is 1.62%. (3) Throws the increment along with catalyst TiO2 elevation, the active black degeneration rate increases gradually. But works as the catalyzed dosage to be excessively many, the active black degeneration rate starts to appear reduces the tendency.(4) Doping few Fe and Cu can enhance the TiO2 photochemical catalysis activeness, but when mixes the quantity is big, will then cause the TiO2 photochemical catalysis activeness to reduce.(5) Under the impulsive discharge condition, dopes TiO2 to compare does not add the catalyst and does not dope TiO2 the degeneration effect to be friends with.(6) The Spectral analysis of black under TiO2 degeneration indicated that catalyst TiO2 can degrade the active black solution under the impulsive discharge and cause it to decolorize completely, azo structure, benzene ring and fused ring disarrangement of the structure decomposition.