Simulated Sunlight Homogeneous/Heterogeneous Fenton For Degradation Of Benzyl Chloride

With the rapid development of China's industry,the pollution of water resources and the shortage of water resources have seriously affected China's sustainable development strategy.The hard-to-degrade organic pollutants have attracted widespread attention due to their high toxicity,slow microbial degradation and incomplete decomposition.The treatment of refractory organic pollutants has become a major global environmental problem.Fenton catalysis as an advanced oxidation technology is being widely used in the catalytic degradation of refractory organic wastewater.Photo-assisted Fenton reaction is one of the most effective advanced oxidation reactions.Under the action of light radiation,hydrogen peroxide(H2O2)is The Fe2+ catalyst catalyzes the formation of(·OH)in the Fenton oxidation system,Fe2+ is oxidized to Fe3+,and H2O2 can also be photolyzed to generate(·OH).The active(·OH)attack of organic pollutants causes it to catalytically degrade to water and carbon dioxide.Heterogeneous Fenton catalysis as an advanced oxidation technique is being extensively studied to catalytically degrade organic pollutants.To develop a heterogeneous Fenton catalyst that can be easily separated and recovered,and has a small amount of iron-free loss or iron loss,can be reused,has stable catalytic performance,and has a wide range of applications,That is An important direction of research to degrade refractory organics in water.Firstly,benzyl chloride was used as the organic contaminant in the waste water.Under the premise of Fenton reaction,the xenon lamp was used to simulate the sunlight of the solar lightsource to change the molar ratio of H2O2 and Fe2+ addition and adjust the initial pH of the solution to catalytically degrade the benzyl chloride in the chemical pollutants.The trend of the degradation of benzyl chloride is to explore the optimal conditions for the reaction.The results showed that when the pH was controlled at 3,the Fe2+ concentration was 4 mmol and the H2O2/Fe2+ molar ratio was 15:1,the degradation effect was best.The degradation rate of benzyl chloride reached more than 90%in 60 min.The components of the degradation products were analyzed by F1-IR infrared spectroscopy apparatus and gas chromatography-mass spectrometry(GS-MS)to analyze the catalytic degradation reaction and analyze the catalytic degradation mechanism.The oxidative degradation of benzyl chloride wastewater was studied by preparing a heterogeneous Fenton catalyst and adding an external xenon lamp to simulate the sunlight source.One-step Fe-Mn-ATP heterogeneous catalyst was synthesized by hydrothermal method.The catalyst was characterized.The effects of pH value,hydrogen peroxide addition amount,illumination time,and initial pollutant concentration on the degradation rate were concluded.One-step hydrothermal method was used to synthesize Fe-Mn-ATP heterogeneous catalyst,and the catalyst was characterized.The characterization results showed that Fe,Mn oxide spheres with 200-300 nm in diameter were successfully formed on the surface of attapulgite.The sun light was simulated by xenon lamp,and explored the Oxidative ability of Benzene Chloride to Refractory Organic Matter by Heterogeneous Fenton Catalyst and analyzed the influence of the optimum pH value,hydrogen peroxide addition amount,different illumination time,different initial pollutant concentration and other factors on the degradation rate.Obtained the initial pH value was 5,the addition of hydrogen peroxide was 2.0 ml,and the degradation efficiency is the best when it was 94.4%.The Fe-Mn-ATP catalyst prepared by this method has good catalytic performance and recycling efficiency,and was an efficient and inexpensive heterogeneous catalyst.