Study On Treatment Of Heterogeneous Fenton Bisphenol A Reagent

Endocrine disruptors,also known as environmental hormones and chemicals is an exogenous endocrine disrupting.Bisphenol A?BPA?is a kind of typical endocrine disruptors,because of its wide application,difficult degradation,environmental toxicity,has become an important research area in recent years.Studies have shown that advanced oxidation technology can effectively the removal of EDCs,Fenton advanced oxidation technology using H₂O₂ to produce OH under the catalysis of Fe2+,is a relatively common advanced oxidation technique in water treatment.But the traditional Fenton oxidation technology H₂O₂ utilization rate is not high,the application range of pH is small?less than or equal to Three?,easy to form iron mud and other deficiencies.Non homogeneous Fenton oxidation technology is an improvement to the traditional Fenton oxidation technology,iron will be loaded onto the carrier made of solid catalyst for catalytic oxidation reaction,compared with the homogeneous Fenton reaction with the catalyst is easy to separate,easy recovery,recycling more.Mild reaction conditions,Fe2+ has the advantages of maintaining sustained release reaction rate stability,saving operation cost,and prevent a large amount of iron sludge produced.In this experiment,BPA as the target pollutants,proposed the use of non catalytic oxidation process of Fenton homogeneous processing.By mixing the catalyst particle activated carbon supported iron oxide and ultrasonic impregnation reduction method,bisphenol A in water to achieve better treatment effect.The main conclusions are as follows:?1?By ultrasonic impregnation reduction method and impregnation-Preparation of activated carbon supported iron and iron oxide catalyst reduction method,scanning electron microscopy,energy spectrum analysis,XRD analysis and specific surface area analyzer of catalysts were characterized on two kinds of catalyst preparation process of the preparation of the structure,morphology and electron microscope were analyzed.Scanning and spectrum analysis results showed that the conventional impregnation reduction catalyst prepared by surface roughness,uneven particle size,ultrasonic impregnation reduction method for preparing the catalyst surface is smooth and porous,more uniform particle size,high content of active components on the surface of the carrier and the load evenly;XRD analysis showed that Two kinds of catalysts in 2?=36°degrees,44.9 degrees and 56.8°degrees respectively appeared strong diffraction peak,higher peak value of ultrasonic catalyst prepared by impregnation,these peaks represent the characteristic diffraction peaks of Fe2O3,Fe3O4,iron and this shows that the reduction in the process of adding sodium borohydride,catalyst the reduction is not complete,thus forming the three components of the mixed iron catalyst;specific surface area analysis results showed that the granular activated carbon supported active component Fe,the total pore volume,average pore size and specific surface area decreased to a certain extent,the conventional catalyst prepared by impregnation decreases more greatly.?2?Two kinds of catalyst preparation process of photodegradation of bisphenol A at the same time,analysis of the experimental result of two kinds of catalysts for catalytic degradation of BPA.The results showed that in the same reaction conditions,ultrasonic impregnation reduction catalyst prepared by better stability,better degradation effect of BPA;?3?The treatment effects of AC,Fe/AC,AC+H₂O₂,Fe/AC+H₂O₂ and on BPA were investigated.The results showed that,under the same reaction conditions,the treatment effect of Fe/AC+H₂O₂ on BPA was better.?4?We studied the catalyst with hydrogen peroxide catalyzed degradation of BPA wastewater by ultrasonic impregnation reduction?pH value,dosage of catalyst,temperature,concentration of H₂O₂?,and ultimately to bisphenol A removal rate as target to determine the optimum conditions,the pH value is 4⁵,the catalyst dosage is 4g/L,the concentration of H₂O₂ was 0.05mol/L the temperature of 30⁴0 DEGC,the reaction of 60 min under this condition,the BPA removal rate reached over 90%.?5?Study on dynamics of the reaction,and the kinetic parameters were determined.Results show that,the Langmuir kinetics model apply to the research of preparation of Fe catalysts,the removal of BPA process includes adsorption and degradation.