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• W3047548329 endingPage "123572" @default.
• W3047548329 startingPage "123572" @default.
• W3047548329 abstract "Heterogeneous Fenton dominated by ·OH is limited in its application, as pre-acidification is required to maximize the generation amount and redox potential of ·OH. It is thus featured to consume resources and generate pollutants. In this study, both CuS/H2O2 and Cu2S/H2O2 are found to show better performances under close-to-neutral condition (pH 5.0 to 9.0) than acidic condition (pH 3.0) when degrading a model contaminant, sulfamethazine (SMZ), because ·OH does not play a major role in both systems. The Cu valence-dependent catalytic mechanisms are responsible for the varied kinetics between CuS/H2O2 and Cu2S/H2O2. In CuS/H2O2, Cu(III) and 1O2 contribute to the SMZ degradation, and their contributions are pH-dependent. In Cu2S/H2O2, Cu(III) is responsible for the degradation regardless of the pH. Both systems with optimal performances under neutral condition are advantageous as pre-acidification can be avoided. In addition, air sparging induces additional 16% SMZ degradation in Cu2S/H2O2 under acidic condition, because the sparged O2 reacts with dissolved Cu(I). The more O2 reacts with the dissolved Cu(I), the less generated Cu(III) is ineffectively depleted. Air sparging is readily applicable to different operations, thus its combination with Cu2S/H2O2 potentially benefits the development of environmentally-friendly treatment process for industrial wastewater." @default.
• W3047548329 created "2020-08-10" @default.
• W3047548329 creator A5017457172 @default.
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• W3047548329 date "2021-01-01" @default.
• W3047548329 modified "2023-10-16" @default.
• W3047548329 title "Cu(III) generation and air sparging extend catalytic effectiveness of Cu2S/H2O2 from neutral to acidic condition: performance and mechanism in comparison with CuS/H2O2" @default.
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• W3047548329 doi "https://doi.org/10.1016/j.jclepro.2020.123572" @default.
• W3047548329 hasPublicationYear "2021" @default.
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