Catalytic ozonation of ibuprofen by Fe-Al2O3/SBA-15 in water
SBA-15 was synthesized hydrothermally in acidic conditions using block copolymer as template.Fe-Al2O3/SBA-15 mesoporous molecular sieve catalyst was prepared by loading iron and aluminum on the surface of SBA-15,and it was used for catalytic ozonation of ibuprofen in water.The characterization results of transmission electron microscope,X-ray diffraction and nitrogen adsorption desorption showed that iron and aluminum were uniformly loaded on the surface of SBA-15,maintaining the ordered mesoporous structure of SBA-15,and having a large specific surface area.The activity evaluation results of different catalysts showed that the loading of iron and aluminum significantly improved the catalytic activity of SBA-15 for ozonation of ibuprofen in water,and iron and aluminum had a synergistic effect.After 60 min of reaction,the TOC removal rate of Fe-Al2O3/SBA-15 was 90％,while that of A12O3/SBA-15,Fe/SBA-15 and SBA-15 were 65％,50％and 36％,respectively,and that of ozonation alone was only 26％.The experimental results showed that the synergistic effect of iron and aluminum was beneficial to the decomposition of ozone into hydroxyl radicals,superoxide radicals and active atomic oxygen.Ibuprofen and small molecule organic acid were adsorbed on the surface of the catalyst,which was conducive to the mineralization of organic matter.The catalyst remains high catalytic activity and stability after being reused for 6 times.
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