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Preparation of [email protected]γ-Al2O3 and Study on Catalytic Ozone Oxidation for the Treatment of RO Concentrate Water

College of Urban Construction, Nanjing Tech University, Nanjing 211816, China
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Academic Editor: Laura Bulgariu
Water 2022, 14(18), 2881; https://doi.org/10.3390/w14182881
Received: 21 July 2022 / Revised: 2 September 2022 / Accepted: 10 September 2022 / Published: 15 September 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
In this paper, a high-efficiency and stable [email protected]γ-Al2O3 catalyst was prepared by taking the reverse osmosis (RO) concentrated water of a sewage treatment plant as the treatment object and activated alumina as the carrier. The preparation factors that affected the catalytic activity of [email protected]γ-Al2O3 were investigated. SEM, EDS, XRD, BET, XRF, and XPS techniques were applied to characterize the catalyst. Optimal working conditions, and degradation mechanism of RO concentrated water were researched. In comparison with the ozone oxidation alone, the [email protected]γ-Al2O3 catalytic ozonation has more reactive groups, significantly improving the treatment effect. Characterization results show that Cu and Ce are successfully supported on the surface of the activated alumina support and mainly exist in the form of oxides (e.g., CuO and CeO2). The loading of metal led to a larger specific surface area and pore volume. The repeated use had an insignificant effect on the peaks of Cu2p and Ce3d energy spectra and caused a small loss of active components. Under these conditions, the removal rate of COD from RO concentrated water by [email protected]γ-Al2O3 catalyst was 85.2%. The stability and salt tolerance of [email protected]γ-Al2O3 catalysts were investigated by catalyst wear rate and repeated use times, respectively. The degradation of organic matter and residual tryptophan-like organic compounds were observed through UV absorption spectroscopy and 3D-EEM. Hydroxyl radicals participated in organic pollutants degradation. Finally, a multi-level-fuzzy analysis evaluation model was developed to quantitatively assess the catalytic ozone oxidation system of the Cu-Ce @γ-Al2O3 catalyst for the treatment of RO concentrated water. View Full-Text
Keywords: ozone catalyst; catalytic oxidation; activated alumina; RO concentrated water; model evaluation ozone catalyst; catalytic oxidation; activated alumina; RO concentrated water; model evaluation
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MDPI and ACS Style

Sun, W.; Xiao, Z.; Sun, Y.; Ding, L.; Zhou, J. Preparation of [email protected]γ-Al2O3 and Study on Catalytic Ozone Oxidation for the Treatment of RO Concentrate Water. Water 2022, 14, 2881. https://doi.org/10.3390/w14182881

AMA Style

Sun W, Xiao Z, Sun Y, Ding L, Zhou J. Preparation of [email protected]γ-Al2O3 and Study on Catalytic Ozone Oxidation for the Treatment of RO Concentrate Water. Water. 2022; 14(18):2881. https://doi.org/10.3390/w14182881

Chicago/Turabian Style

Sun, Wenquan, Zhiqiang Xiao, Yongjun Sun, Lei Ding, and Jun Zhou. 2022. "Preparation of [email protected]γ-Al2O3 and Study on Catalytic Ozone Oxidation for the Treatment of RO Concentrate Water" Water 14, no. 18: 2881. https://doi.org/10.3390/w14182881

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