An Experimental Study On The Catalytic Oxidation Of Ibuprofen Wastewater By Ozone In An Internal Circulating Fluidized Bed

Heterogeneous catalyzed ozone oxidation of organic wastewater with refractory organic pollutants is a hot topic in wastewater treatment.In this paper,Cu-Mn-Ce/HTS-1catalyst,Cu-Mn-Ce/?-Al₂O₃ catalyst and Cu-Mn-Ce/sepiolite catalyst were prepared and characterized.By constructing heterogeneous catalytic ozonation system,the catalytic activity and stability of catalysts were investigated,and the effects of various reaction conditions on catalytic performance were discussed.Based on the experimental data,the catalytic ozone oxidation and degradation of ibuprofen wastewater was studied.The experimental results are as follows:1)Design catalytic ozone three-phase internal circulating fluidized bed.The overall volume of the reactor was calculated by using the activated alumina as an example,and the flow rate at 0.2 m·s^-11 was obtained through Fluent simulation.2)Prepare Cu-Mn-Ce/HTS-1 catalyst by co-precipitation method.Under the condition of ozone flow rate of 30 mg·min^-1,initial solution pH=7,and catalyst dosage of450 mg·L^-1,TOC removal rate of ibufen was 95.33%at 108 min of catalytic ozone oxidation reaction,which was 53.5%higher than that of ozone reaction alone under the same condition.3)Prepare Cu-Mn-Ce/?-Al₂O₃ catalyst by coprecipitating method.Under the condition of ozone flow of 30 mg·min^-1,catalyst dosage of 450 mg·L^-1and initial pH=7,the TOC removal rate of ibufen was 80.96%at 108 min,which was 39.13%higher than that at the same condition.4)The Cu-Mn-Ce/sepiolite catalyst was prepared by co-precipitation method.Under the condition of ozone penetration of 30 mg·min^-1,catalyst addition of 450 mg·L^-1and initial pH=7,the TOC removal rate of ibufen was 96.17%at 108 min of catalytic ozone oxidation reaction,which was 54.34%higher than that of ozone reaction alone under the same condition.