首页|Catalytic ozonation of N, N-dimethylacetamide in aqueous solution by Fe3O4@SiO2@MgO composite: Optimization, degradation pathways and mechanism
Catalytic ozonation of N, N-dimethylacetamide in aqueous solution by Fe3O4@SiO2@MgO composite: Optimization, degradation pathways and mechanism
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NSTL
Elsevier
Background: Catalytic ozonation is a commonly used technique in deep treatment of water. Magnesium oxide is an effective catalyst in ozonation, but how to effectively separate and improve its stability remains big challenge. Method: The magnetic core-shell Fe3O4@SiO2@MgO was prepared by co-precipitation method, and the prepared catalyst could be easily recovered through magnetic separation. Significant findings: Ozonation of N, N-dimethylacetamide (DMAC) was used to test the performance of Fe3O4@SiO2@MgO. The removal fraction of DMAC by Fe3O4@SiO2@MgO catalytic ozonation was 99.96% in 12 min, which was almost 4.3 times that of ozonation alone under the same conditions. In addition, the mineralization rate of DMAC at 12 min was 43.70%, much higher than that of ozone alone (11.90%). The recycling test manifested the excellent stability and recoverability of Fe3O4@SiO2@MgO, indicating the formed composite is a potential practical catalyst. The possible DMAC degradation pathways and reaction mechanism of Fe3O4@SiO2@MgO/O-3 process were proposed. (c) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
NSTL
Elsevier
