Study On Preparation Of Recyclable Catalyzer And Its Performance In The Degradation With Fenton-Like Technology

In industrial wastewater such as printing and dyeing and papermaking,it contains a large amount of refractory organic pollutants.The content of organic substances in wastewater is complex,the chroma is high,the pH value is large,and the degradation is difficult.If the wastewater is directly discharged,it will have a serious impact on the early morning environment and a direct or indirect impact on the ecosystem and even the health of the human body.Therefore,research and preparation of catalysts with high catalytic performance,wide pH range and good stability are the main directions of Fenton-like treatment research.The main research contents of this thesis are:?1?Based on the decolorization rate of methylene blue,the removal rate of COD and the physical form of the catalyst,the proportion of each component of the catalyst was determined and the preparation of the catalyst was optimized.?2?With the aim of methylene blue,the adsorption and catalytic degradation properties of the catalyst were analyzed.?3?Finally,the recycling of catalysts was studied and the mechanism of catalyst broadening pH was analyzed.The conclusions are as follows:In this study,Fe/Co/graphene composite Fenton catalyst was prepared by liquid phase reduction method.The effects of Fe,Co and graphene content on the degradation of methylene blue by the Fenton-like catalyst were analyzed by single factor method.The adsorption analysis of the catalyst was carried out,which was in accordance with the kinetic quasi-secondary kinetic model.Increasing the temperature in the range of25-55°C was beneficial to the adsorption of methylene blue by the catalyst.The optimum reaction conditions for the heterogeneous Fenton-like Fenton catalyst treatment of methylene blue solution with a concentration of 100 mg/L were determined by single factor and orthogonal experiments:The dosage of catalyst was 1.6g/L,the dosage of H₂O₂ was 6ml/L,the initial pH value was 7,the reaction time was 90min,the decolorization rate of methylene blue was 98.23%,and the removal rate of COD was92.45%.Figure33;Table10;Reference 65...