A Study Of Copper Treatment Of Waste Water With Sulfate Radical In Heterogeneous Conditions

In this study,reactive brilliant blue was chosen as the target pollutant.China is a big country of dye production,the data show that the textile dyeing industry has developed rapidly in recent years,according to statistics,China's current production of various dyes has reached 900 thousand tons,accounting for about 60%of the world's dye production.Therefore,it is of great significance to study the treatment of dye wastewater.Because of the complex composition,it is difficult to treat dye wastewater with the traditional wastewater treatment methods.So the advanced oxidation technology captures great interest as a promising environmental technology of water treatment.The dye wastewater was treated with activated carbon,activated carbon supported metal and metal oxide catalytic oxidation has obvious advantage.In this experiment,CuO/AC catalysts was prepared with acidificated activated carbon as carrier to support copper.The prepared catalyst were characterized by XRD,the results showed that copper loaded on activated carbon in the form of oxides.In this study,reactive brilliant blue solution was treated by SO4-which was produced with CuO/AC catalyzed persulfate(K2S2O8)and has strong oxidation ability.In this paper,catalyst was synthesized firstly,then the effect of catalyst and oxidant dosage,the reaction solution initial concentration of reaction solution,initial pH and temperature are discussed to find the optimal conditions treating reactive brilliant blue solution.As the activation technology has been got the favor in the researchers of persulfate oxidation technology at present.In this paper,effects of microwave,UV and ultrasonic activation are investigated to find the optimal conditions degrading reactive brilliant blue solution.What's more,free radicals produced in the four reaction systems were tested.Conclusions of experiments are as below:(1)100mL reactive brilliant blue solution of 100mg/L was degraded under the condition of normal temperature,the dosage of CuI/AC was 0.9g/L,K2S2O8 dosage of was 0.7g/L,initial pH in the solution.The decoloration rate of reactive brilliant blue can reach more than 90%after 3.5 hours;The increase of temperature is beneficial to the decolorization of reactive brilliant blue.The decoloration rate of reactive brilliant blue was close to 100%when the temperature is at 70.(2)100mL reactive brilliant blue solution of 100mg/L was degraded under the condition of UV activation,the dosage of CuO/AC was 0.7g/L,K2S2O8 dosage of was 1.1 g/L,initial pH in the solution.The decoloration rate of reactive brilliant blue can reach 79%after 30min.The reaction time of degradation of reactive brilliant blue was obviously shortened after adding UV activation.(3)30mL reactive brilliant blue solution of 100mg/L was degraded under the condition of microwave activation,the dosage of CuO/AC was l.lg/L,K2S2O8 dosage of was 1.1 g/L,initial pH in the solution.the decolorization rate was up to 95%after 70s.(4)100mL reactive brilliant blue solution of 100mg/L was degraded under the condition of ultrasonic activation,the dosage of CuO/AC was 0.8g/L,K2S2O8 dosage of was 0.6g/L,initial pH in the solution.The decoloration rate of reactive brilliant blue can reach 80%after 40min.In the four systems,we can see that there are two kinds of free radicals:SO4-and OH degradation of reactive brilliant blue solution through the free radical verification experiments.