Study On Electron Fenton Treatment Process Of Dye Wastewater

The water pollution caused by the dye industry due to its high concentration of organic compounds and its bright and colorful appearance,which can cause serious environmental problems.Because synthetic dyes and related chemicals are designed to make them stable compounds,traditional methods are often difficult to degrade dye wastewater.This article uses the electric Fenton process for the current status of dye wastewater treatment.The reaction device of this process is made by the laboratory.The iron material is used as the anode material,the graphite plate is used as the cathode material,and sodium sulfate is used as the electrolyte of the system.In order to improve the degradation efficiency of the system,a self-made Fenton-like catalyst was applied,and the catalyst was applied to the electric Fenton system,so that more hydrogen peroxide was generated in the system to generate hydroxyl radicals to improve the degradation efficiency of wastewater.During the experiment,reactive red 3BS dye was selected to prepare the simulated wastewater.By degrading the wastewater,the amount of each component of the catalyst and its proportion are first determined.The optimal process parameters of the electro-Fenton body were finally determined through the degradation of the simulated wastewater by the electro-Fenton process.The experimental prepared Fenton-like catalysts use?-Al₂O₃ as the carrier and support two elements,Fe and Ce.Through the degradation effect of simulated wastewater,it can be concluded that when the molar ratio of Fe and Ce is 1:0.5,the prepared catalyst has the best degradation effect.The catalyst was characterized by SEM,XRD and BET.From the characterization results,it can be seen that the active component was successfully supported on the support surface in the form of crystals,thereby improving the catalytic activity of the catalyst.The effect of electrolysis voltage,initial pH,amount of electrolyte and amount of catalyst on the degradation effect was investigated during the experiment of degrading wastewater by electro-Fenton system.The experimental results show that different factors are explored.When the electrolytic voltage is 6.0 V,the initial pH is 3.00,the plate spacing is 4.0 cm,the amount of sodium sulfate in the electrolyte is4.00 g/L,and the amount of catalyst in the amount of 0.15 g is the best for treating 1.0 L of wastewater.Degradation of wastewater under these process parameters can achieve a decolorization rate of 94.3%and the COD removal rate of 82.5%when the treatment time is 90 minutes.Finally,the wastewater was treated according to the actual wastewater treatment process.First,the pre-treatment was conducted in the pre-treatment phase.The effects of flocculant types,initial pH of the reaction,and the amount of flocculant on the pre-treatment results were investigated.The experimental results show that the best flocculation effect is achieved when the initial pH of the reaction system is 6.50 with PAC as the flocculant and the addition amount is 1.0 g/L.The removal rate of COD can reach57.5%and the removal rate of CN can reach 77.5%.Then the effluent was treated with electric Fenton to verify the practicability and applicability of the process conditions.Then the effluent was subjected to electric Fenton treatment to verify the practicability and applicability of the process conditions.The results showed that when the electrolysis voltage was 8.0 V,the initial pH of the reaction was 3.00,and 0.15 g of catalyst was added.Degradation of COD and chromaticity of wastewater have better effects.The general applicability of the process conditions was verified,and studies showed that the electric Fenton process has a significant effect on the treatment of actual dye wastewater.