Most previous reports related to heterogeneous Fenton focused on improving the catalytic activity of the catalysts but ignored the consumption and utilization efficiency of hydrogen peroxide (H 2 O 2 ), which has caused a large invalid waste of H 2 O 2 . This paper reports a Fe 3 O 4 -zeolite-cyclodextrin (F-Z-C) heterogeneous Fenton catalyst that can prolong the reaction duration time and improve the H 2 O 2 utilization. The pollutants can be adsorbed to the catalyst surface by the zeolite and the Fe 3 O 4cyclodextrin nanostructure, which will increase the local concentration of pollutants. Meanwhile, the H 2 O 2 dispersed in water can be temporarily captured and stored by β-cyclodextrin, decreasing the invalid consumption of free H 2 O 2 . A series of experiments indicate that the F-Z-C catalyst can store H 2 O 2 and release out slowly in a certain condition. Benefiting from the "storage-release" effect of F-Z-C on H 2 O 2 , the utilization efficiency of H 2 O 2 can be greatly improved. As a result, the contradiction between the large needed amount and the low concentration of H 2 O 2 can be solved in practical wastewater treatments.
The gas phase surface discharge with microporous bubbling was used to evaluate the degradation feasibility of pharmaceutical contaminants. After 25 min treatment, 82% removal of ibuprofen (initial concentration of 60...
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