Preparation Of Multi-metal Supported Particle Electrode And Its Research On Simulated Wastewater Treatment Of Polyacrylamide

Three-dimensional electrode electrochemical treatment technology with its no need to add drugs,simple equipment and other unique advantages are concerned in electrochemical water treatment.The particle electrodes of the third pole of the reactor greatly increase the electrode surface area and promote the process of electrolysis mass transfer process.Shale gas is a fast-growing source of natural gas and has become a new hotspot in global resource exploration and development.The treatment of the effluent waste liquid with the acrylamide polymer?PAM?as the characteristic contaminant is a key link of environmental protection and maintaining shale gas production industry sustainable development.In this paper,Sn\Sb and Sn\Sb\Co were combined with activated carbon particles which are the substrate.The results show that:? GAC/SnSbCo particles have the best effect on the degradation of PAM simulated wastewater in three kinds of particle electrodes,The COD_cr removal rate of GAC/SnSbCo is up to 34.2%,7%higher than GAC/SnSb,14%higher than GAC.? The corresponding oxygen overpotential of GAC,GAC/SnSb,GAC/SnSbCo three types of particle electrodes are respectively 0.60,0.725 and 0.925V,namely,GAC/SnSbCo>GAC/SnSb>GAC,which indicates that when using GAC/SnSbCo as particle electrodes,the occurrence of side reactions is less,the electrocatalytic activity is higher.?The impedance Rf values of GAC,GAC/SnSb and GAC/SnSbCo are 26.15,23.76 and 18.73Q · cm-2 respectively.The impedance of GAC/SnSbCo is the smallest,the conductivity is the best,? In the three kinds of particle electrodes,the amount of hydroxyl radicals produced by GAC/SnSbCo as the particle electrode was the highest,followed by GAC/SnSb,and GAC was the lowest.The effect of Co doping amount and calcination temperature on the PAM simulated wastewater effect and the electrochemical performance of GAC/SnSbCo were investigated.And its microstructure and crystal structure were characterized.The results show that:?the degradation efficiency of PAM simulated wastewater is the best and the energy consumption per unit volume is the lowest when the doping amount of Co is 2%.At the time of 40 min,the corresponding COD_cr removal rate and unit volume energy consumption were respectively 42.8%and 10.13 kw · h/m³.?Comparing the polarization curves and oxygen overpotential at different Co doping amount,the highest oxygen evolution potential is 1.18V when the doping amount is 2%,which indicates that the side effect of the supported particle electrode is less and the electrocatalytic activity is higher.?The degradation efficiency of PAM simulated wastewater is the best and the energy consumption per unit volume is the lowest when the doping temperature of Co is 450 ?.At the time of 40 min,the corresponding COD_cr removal rate and unit volume energy consumption were respectively 44%and 10.21 kw · h/m.The highest oxygen overpotential is 1.17V and the electrocatalytic performance is best.?According to the SEM,when the doping amount is 2%,the coating effect is the best,the metal oxide agglomeration decreases,the particle size is uniform,the number of grains is the largest,and the grain size is the smallest.?the temperature of the metal oxide oxidation is complete through XRD,resulting in better replacement of solid solution.The optimum electrolysis conditions were as follows:pH = 6.0,particle electrode dosage 600g/L,tank voltage 20V,apron insulation method,COD_cr removal rate as high as 57.3%.The GAC/SnSbCo particles were the same as the electrochemical degradation of PAC.The main intermediates were acrylic and,but the GAC/SnSbCo particles were more oxidized than GAC/SnSb.thorough.The electrochemical reaction of PAM wastewater with three-dimensional electrode is consistent with the first-order kinetics equation.