Study On Synergistic Effect Of Electrolytic Printing And Dyeing Wastewater By Adsorbing Functional Electrodes

The printing and dyeing industry is an important traditional civilian production in dustry in China.In recent decades,the textile printing and dyeing industry has develo ped rapidly.According to statistics,35%of the total industrial wastewater discharge is discharged from the printing and dyeing industry,and because of the high concentrati on of pollutants,there are many types.It contains high levels of toxic and harmful in gredients and is difficult to be completely treated.In this paper,for the series of prob lems in the treatment of printing and dyeing wastewater,the printing and dyeing wast ewater is electrolyzed by the electrode with adsorption function.In this paper,the electrodes were prepared by using activated carbon and graphen e with good adsorption properties as raw materials.The physicochemical properties of the two materials were characterized by electron microscopy(SEM)and Fourier trans form infrared spectroscopy(FTIR).The electrical properties of the two electrodes were analyzed using cyclic volt-ampere characteristic curve(CV)test,alternating current i mpedance(EIS)test,and constant current charge-discharge(GCD)test.At the same ti me,the two-dimensional electrode method was used to degrade methyl orange wastew ater and rhodamine B wastewater under different conditions.The results show that the internal resistance of the activated carbon electrode is r elatively large,the interface migration resistance is also large,the electrical properties are general,and the specific capacitance value is 192.31 F/g.The graphene electrode has low equivalent series resitance,fast ion mobility,high charge transfer efficiency,good capacitance,and a specific capacitance value of 461.54 F/g.Activated carbon electrode at pH=6,electrolyte dosage of 1.0 g,voltage of 15 V,initial solution concentration of 150 mg/L under optimal conditions of electrolytic methyl orange wastewater,the removal rate can reach 59.34%;at pH=6,the electrolyte dosage is 1.0g,the experimental voltage is 10V,the initial concentration of the solution is 100 mg/L under the optimal conditions for the treatment of rhodamine B wastewater,the removal rate can reach 43.91%.The graphene electrode treated with methyl acetate wastewater at pH=6,electrolyte dosage of 1.0g,voltage of 15V and initial solution concentration of 250 mg/L,the removal rate can reach 97.34%;at pH=6,The dosage of electrolyte was 1.0g,the experimental voltage was 15V,and the initial concentration of 200 mg/L was used to treat Rhodamine B wastewater The removal rate could reach 96.21%.Separate foam nickel electrolysis and electrode adsorption have a relatively low removal rate of printing and dyeing wastewater.It can be seen that when the printing and dyeing wastewater is electrolyzed by the adsorption function electrode,there is a synergistic effect between the electrolysis and the adsorption,and the two effects mutually promote each other and strengthen each other to achieve a better degradation effect.