Study On The Treatment Of Organic Pollutants In Water Using Three-dimensional Electrodes

Dye wastewater treatment has always been a distressing problem.This kind of wastewater has high organic content,many biodegradable components,poor biodegradability,and high chroma.At present,there are physical adsorption methods,biological methods,chemical oxidation methods,and electrochemical oxidation methods for the treatment of dye wastewater.The electrochemical oxidation method is an effective method to deal with toxic,hazardous and difficult to degrade wastewater.The electrochemical oxidation method of three-dimensional electrode has the characteristics of large volume,large processing capacity per tank,high current efficiency,no use or use of a small amount of chemicals,and strong processing capacity compared with the conventional two-dimensional plate electrode.Therefore,the process of treating wastewater with the three-dimensional electrode method is becoming more and more widely used in the research of the degradation of difficult-to-treat wastewater.In this paper,reactive brilliant blue was used as the modle dye,and the reaction mechanism,influencing factors,and optimized processing parameters of the simulative wastewater conducted by three-dimensional electrode method with different particle electrode were studied to determine the best experimental conditions.The focus of this paper is to prepare three-dimensional particle electrodes with excellent performance.The main research contents are as follows:?1?Preparation and properties of CuO/AC particle electrodeCuO/AC particle electrodes loaded with different amounts of CuO were synthesized after the activated carbon was immersed in different concentrations of copper sulfate solution for a long time.The samples were characterized by XRD,EDS,SEM,and BET,etc.,indicating that CuO has been successfully loaded on AC and the pore size and specific surface area of??the CuO/AC particle electrode are smaller than those of the AC particle electrode.Through the analysis of the activity of the samples,it was concluded that the electro-catalytic oxidation activity of the CuO/AC particle electrode immersed with 0.05 mol/L copper sulfate solution was found to be the best,the decolorization rate was 82.2%.The decolorization rate of the sample reached 95.4%under the photoelectric cooperation.?2?Preparation and properties of Mn₃O₄/AC particle electrodeMn₃O₄/AC particle electrodes loaded with different amounts of Mn₃O₄ were synthesized after the activated carbon was immersed in different concentrations of copper sulfate solution for a long time.The samples were characterized by XRD,EDS,SEM,and BET,etc.,indicating that Mn₃O₄ has been successfully loaded on AC and the pore size and specific surface area of??the Mn₃O₄/AC particle electrode are smaller than those of the AC particle electrode.Through the analysis of the activity of the samples,it was concluded that the electro-catalytic oxidation activity of the Mn₃O₄/AC particle electrode immersed with0.03mol/L manganese sulfate solution was found to be the best.The decolorization rate was86.88%.?3?Preparation and properties of?-PbO₂/AC particle electrodeIn the experiment,?-PbO₂/AC particle electrodes loaded with different amounts of?-PbO₂ were synthesized under different dosage of lead nitrate.The samples were characterized by XRD,EDS,SEM and BET,etc.,indicating that?-PbO₂ has been successfully loaded on the AC and the pore size and specific surface area of??the?-PbO₂/AC particle electrode are smaller than those of the AC particle electrode.Through the analysis of the activity of the samples,it was concluded that the electrocatalytic oxidation activity of the?-PbO₂/AC particle electrode with 1.3g dosage of lead nitrate was found to be the best.The decolorization rate was 89.51%.?4?Preparation and properties of Fe₄O₃/AC particle electrodeFe₄O₃/AC particle electrodes loaded with different amounts of Fe₄O₃ were synthesized after the activated carbon was immersed in different concentrations of ferric nitrate solution for a long time.The samples were characterized by XRD,EDS,SEM and BET,etc.,indicating that Fe₄O₃ has been successfully loaded on the AC.Through the analysis of the activity of the samples,it was concluded that the electrocatalytic oxidation activity of the Fe₄O₃/AC particle electrode immersed with 0.03 mol/L ferric nitrate solution was found to be the best.The decolorization rate was 75.6%.