Experimental Study On Degradation Of Methyl Orange By Electrochemical Method With Separating System Cathode And Anode

In recent years,with the rapid development of China's modern industry,more and more organic pollutants are difficult to be degraded.Advanced electrochemical oxidation technology,because of its environmental friendly characteristics,has a great prospect in the treatment of dye wastewater.In this paper,the anode and basic function of electrochemical method on the diaphragm device for treatment of methyl orange simulated dye wastewater was studied,analysis of the mechanism and reaction conditions,explore the reaction principle,lay the foundation for refractory organic processing.In this paper,a study on the treatment of dye wastewater by the electrochemical oxidation of the anode and cathode in the electrochemical reactor was carried out.The main contents are:the optimization of electrode and diaphragm material;factor analysis of diaphragm system with/without the electrochemical oxidation process of methyl orange;decolorization effect and energy consumption compared with/without membrane system by electrochemical oxidation;kinetics of anode indoor analysis,the degradation of Methyl Orange Degradation Mechanism Analysis and UV Vis spectroscopy.Experiments with graphite,titanium,titanium ruthenium iridium iridium coating coating as the test results show that the anode material,titanium ruthenium and iridium coating electrode effect on the degradation of methyl orange is better than that of the other two kinds of electrode materials;the optimal anode respectively by graphite,steel plate,titanium plate as cathode material test,the results show that the titanium plate electrode degradation is better than that of the other two Mo electrode;in optimal electrode conditions,respectively,747,729 cotton,polyester polyester as the test results in the diaphragm material,diaphragm material for polyester 729 methyl orange degradation effect is better.Study on the influence factors of the Na2SO4 system with/without diaphragm electrolyte by electrochemical oxidation in the dosage and the initial concentration of methyl orange,electrode distance,voltage and aeration on the treatment effect,the effect and mechanism.In the two system,electrolyte dosage can effectively improve the decolorization effect,but not excessive;the low initial concentration of methyl orange wastewater treatment more efficient;the distance between the two electrode plates the size of the best value for the decolorization rate of methyl orange was studied;the reaction effect with the increase of the voltage increased and then decreased,and the size of voltage determine the energy consumption,reaction speed should not be too high;aeration rate of methyl orange decolorization of the cathode chamber affected the decolorization rate of methyl orange on the anode chamber had almost no effect;the removal of the final effect of the reaction time,the longer the more thorough degradation,but the time is too long,will increase the system energy consumption,so to choose a suitable time.In the electrolyte,the dosage of NaZSO4 was 0.02mol/L,the initial concentration of organic matter is 100mg/L,electrode spacing is 4cm,voltage is 20V,aeration rate 2L/min,electrolytic 60min two in the system of methyl orange decolorization rate and COD removal rate can reach the best state.The decolorization rate of methyl orange was 75.21%and the COD removal rate was.In the membrane system,the decolorization rate of methyl orange in the cathode chamber is 90.23%,the removal rate of COD is about 70.77%,the decolorization rate of methyl orange in the anode chamber is,and the removal rate of COD is about 75.38%.The electrochemical degradation of methyl orange in the membrane system was better than that without the membrane system,and the decolorization rate of methyl orange in the anode system was better than that in the non membrane system.Under the optimum experimental conditions,the energy consumption of the electrochemical oxidation process with or without the membrane system was compared.The energy consumption model of diaphragm system and diaphragm free system is established.The results show that the energy consumption of the cathode chamber is only 38%of the energy consumption of the diaphragm system,and the energy consumption of the anode chamber is only about.Comprehensive analysis,regardless of the decolorization rate or in terms of energy consumption,the diaphragm system,the role of the Yin and Yang CO oxidation method has more advantages.The degradation of methyl orange in the anode and cathode in the oxidation and oxidation of the membrane system is in accordance with the first order kinetic model,and the mechanical equation is-ln Ct/CO ?kt.The effects of various factors on the reaction rate were different.Detection of UV Vis absorption spectra,the methyl orange in the electrolysis process concentration decreases,there is destruction of the molecular structure and mineralization,the decolorization effect in the anode chamber in the cathode chamber,but the degree of mineralization of methyl orange cathode chamber is better than the anode chamber.