Study On The Preparation Of Functional Carbon Materials And Their Treatment Of Methylene Blue

Dye effluents will pollute the environment and affect human health,because it has the characteristics of complex water quality and large discharge volume.Therefore,how to use efficient and cheap treatment methods to deal with dye effluents,has become an urgent problem to be solved accordingly.The main research content of this topic is as follows:1、The adsorption capacity is prepared by the hydrothermal synthesis method,and the adsorption capacity is 106.4 mg/g.Loading Fe₃O₄does not significantly change the internal structure of activated carbon,but the separability of activated carbon is significantly improved.The magnetic activated carbon is completely precipitated in 5min under the action of natural gravity,and solid-liquid separation is achieved in 30 s under the action of magnetic force.This experiment uses methylene blue as the adsorbent to explore the adsorption process of magnetic activated carbon.The final results are as follows:the initial concentration of methylene blue is 200 mg/L,the magnetic activated carbon is 0.2 g,the adsorption is 3 h,and the removal rate is 95%.The Langmuir model（R²=0.996）and the pseudo-second-order equation can better describe the adsorption process of methylene blue on magnetic activated carbon,and thermodynamic analysis shows that the adsorption process is spontaneous and is an endothermic reaction.Based on the above results,the material is conducive to recycling and has certain value for practical applications.2、In this experiment,under the conditions of mass ratio of sludge,cobalt chloride,and nickel chloride of 2:1:1,activation temperature of 600℃,and reaction time of 60min,a separable activated carbon was prepared.The surface of activated pyrolyzed sludge activated carbon has a rich pore structure,which is characterized by SEM and BET,and its specific surface area is 120.861 m²/g.Through the adsorption process of sludge activated carbon on methylene blue,it is found that alkaline conditions are favorable for adsorption,and the adsorption value can reach 31.35 mg/g at p H=10;within a certain range,the dosage of sludge activated carbon increases,and the adsorption capacity also increases.The analysis of adsorption kinetics shows that the pseudo-second-order kinetic equation better describes the adsorption of methylene blue wastewater by the adsorbent,and R²is greater than 0.977;the adsorption isotherm model analysis shows that the adsorption of methylene blue by sludge activated carbon is monolayer adsorption;according to thermodynamic analysis,the adsorption process is a spontaneous endothermic process.Based on the above results,a new direction and basis are provided for the harmless and resourceful treatment of sludge.3、In this experiment,activated carbon was used as a carrier to prepare a chitosan/TiO₂/activated carbon composite material.The composite materials were characterized and analyzed by SEM,XRD,BET and infrared spectroscopy.The results show that the surface of the composite material is rough with pores distribution;the crystallinity of the crystal is better;the specific surface area of the composite material reaches 27.343 m²/g;the surface of the composite material has abundant functional groups.The adsorption of methylene blue on the chitosan/TiO₂/activated carbon composite material conforms to the Langmuir model（R²=0.999）and the pseudo-second-order equation（R²=0.999）.The experimental results show that the adsorption capacity of the material is 103.4 mg/g;the thermodynamic results show that the adsorption process of methylene blue by chitosan/TiO₂/activated carbon composite is a spontaneous endothermic reaction.The chitosan/TiO₂/activated carbon composite material has a certain photocatalytic degradation effect on the simulated dye effluents methylene blue.The decolorization rate of methylene blue reaches 46.9%under 160min of light.Based on the above results,this method provides a new technical support and data reference for the treatment of printing and dyeing wastewater.Figure[31]table[19]reference[103]...