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- W4362636957 abstract "Background: Catalytic ozonation process has become one of the most promising technologies in organic wastewater treatment industry due to its high efficiency and rapidity. Some researchers have found that alkaline earth metal oxides can be used to promote the ozonation process to removal organic compound in wastewater. And some of them believe that calcium-based catalysts can effectively catalyze the ozonation reaction, but there are few reports about its reaction mechanism. Methods: In this work, calcium oxide was used as catalyst to study their effect in phenol wastewater and the mechanism of catalytic reaction process. In the catalytic ozonation process, the surface hydroxyl of solid CaO-based catalyst can react as the reaction active sites to promote the formation of free radicals, and the Ca2+ solutes in this system can promote the decomposition of H2O2 to produce free radicals. At the same time, the addition of calcium oxide-based catalyst also increases the pH of the reaction system, which is conducive to the decomposition of ozone to produce hydroxyl radicals. Owing to the presence of •OH, 1O2 and •O2−, phenol and by-product are decomposed effectively. Significant findings: The experimental results show that the COD removal rate of phenol reached ∼100% in 20 min. And in this study, the mechanism of CaO-based catalysts used in the ozonation process was studied. We found that both of Ca2+ in solution and solid calcium oxide promoted the formation of active free radicals in catalytic ozonation process." @default.
- W4362636957 created "2023-04-07" @default.
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- W4362636957 date "2023-04-01" @default.
- W4362636957 modified "2023-10-15" @default.
- W4362636957 title "Efficient mineralization of organic pollutants in water via a phenol-responsive catalytic ozonation process" @default.
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- W4362636957 doi "https://doi.org/10.1016/j.jtice.2023.104804" @default.
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