| Since the industrial revolution in the 1860s,the speed of global industrial development has been accelerated.a series of environmental problems have emerged.In recent years,people began to pay attention to the problem of water pollution.Among them,there is a wide range of sources,a variety of hazardous industrial wastewater if not treated into the nature,will pose a threat to human health and life safety.Therefore,the treatment of different industrial effluents has become a problem all over the world.How to treat benzene series wastewater green,efficient and economical is very important.After exploration and research,electrocatalytic advanced oxidation process（EAOP）,compared with traditional technology,electrocatalytic advanced oxidation process has obvious advantages,including small footprint,green treatment,high efficiency,low cost,simpler operation,and no secondary pollution after the reaction.There is no strict requirements for the working environment.Ti/Ru-Ir-Sn-Sb oxide anodic coating electrode was prepared by thermal decomposition method in order to achieve efficient and green degradation of industrial wastewater.The first step in electrode preparation is to treat the titanium substrate.The purpose of pretreatment is to make the coating adhere to the surface of the titanium substrate better and stably.And the most suitable calcination temperature of anode material was analysed by thermogravimetric-differential scanning calorimetry（TG-DSC）.Ti/Ru-Ir-Sn-Sb electrode was obtained after calcination for several times.The properties of the active layer were analyzed using SEM,EDS,XRD and other characterization techniques;and the electrochemical properties of electrode materials were tested and analyzed by electrochemical means of cyclic voltammetry（CV）,electrical impedance scanning（EIS）and linear sweep voltammetry（LSV）.The data obtained from the test are:the oxygen evolution potential of the electrode is 1.26 V;the chlorine evolution potential is 1.08 V;the active area of the prepared material is 220.3;and the voltammetric charge is 120 m C.The accelerated lifetime of the electrode is 34 h at a current density of 2 A·cm-2,and the electrode has good electrical conductivity.The electrolysis treatment of simulated wastewater（phenol simulated wastewater and aniline simulated wastewater）by electrodes was studied.The degradation was systematically investigated from the initial concentration of phenol and aniline,current density,p H and Cl-concentration.The optimal degradation conditions were obtained,and the degradation mechanism was analyzed.Through the experiments in this paper,it is found that the increase of the initial concentration of phenol,the increase of the current density,and the increase of the Cl-concentration are all conducive to improving the degradation effect of phenol.The degradation is complete after 180 min of degradation reaction when the optimal conditions are follow as:Cl-concentration is 800 ppm;current density is 20 m A·cm-2;the initial concentration of phenol is 200 ppm;p H=3.When using the Ti/Ru-Ir-Sn-Sb electrode to degrade aniline simulated wastewater,it was found that the increase of the initial concentration of aniline,the increase of the current density,and the increase of the Cl-concentration were also beneficial to improve the degradation effect of aniline,and the optimal aniline was obtained.the optimal conditions are follow as:Cl-concentration is 800 ppm;current density is 20 m A·cm-2;initial aniline concentration is 200 ppm;p H=9,and the degradation rate reached 99.7%after 180 min.However,in order to control the cost of raw materials and energy consumption,p H=7 is selected as the optimal degradation condition. |
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