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学者姓名：程艺真
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Abstract ：
This study investigates the environmental significance of ciprofloxacin as an emerging contaminant and the need for effective degradation methods. The chemical coprecipitation method was used in this study to prepare the Zn-Cu-Ni composite silicate, serving as a heterogeneous ozonation catalyst. The catalytic activity was then evaluated by degrading ciprofloxacin (CIP). Scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption, and Fourier transform infrared analysis (FTIR) were used to characterize the Zn-Cu-Ni composite silicate. The catalyst had a high surface area (308.137 m2/g), no regular morphology, and a particle size of 7.6 mu m and contained Si-O-Si, Ni-O-Si, and Zn-O-Si. The results showed that the CIP degradation and mineralization rates (pH 7.0, CIP 3.0 mg/L, Ozone 1.5 mg/L) were significantly enhanced in the presence of the Zn-Cu-Ni composite silicate. The CIP and total organic carbon (TOC) removal rates were increased by 51.09% and 18.72%, respectively, under optimal conditions, compared with ozonation alone. The adsorption of Zn-Cu-Ni composite silicate, ozone oxidation, and OH oxidation synergistically promoted the efficient removal of CIP. This study provides valuable catalytic ozone technology for degradation of antibiotics in wastewater to reduce environmental pollution with potential practical applications.
Keyword ：
chemical coprecipitation method chemical coprecipitation method ciprofloxacin degradation ciprofloxacin degradation heterogeneous catalytic ozonation heterogeneous catalytic ozonation reactive oxygen species reactive oxygen species Zn-Cu-Ni composite silicate Zn-Cu-Ni composite silicate
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| GB/T 7714 | Liu, Yue , Guo, Rong , Li, Jie et al. Enhanced Ciprofloxacin Ozonation Degradation by an Aqueous Zn-Cu-Ni Composite Silicate: Degradation Performance and Surface Mechanism [J]. | SEPARATIONS , 2025 , 12 (1) . |
| MLA | Liu, Yue et al. "Enhanced Ciprofloxacin Ozonation Degradation by an Aqueous Zn-Cu-Ni Composite Silicate: Degradation Performance and Surface Mechanism" . | SEPARATIONS 12 . 1 (2025) . |
| APA | Liu, Yue , Guo, Rong , Li, Jie , Cheng, Yizhen , Wang, Congmin , Wang, Weiqiang et al. Enhanced Ciprofloxacin Ozonation Degradation by an Aqueous Zn-Cu-Ni Composite Silicate: Degradation Performance and Surface Mechanism . | SEPARATIONS , 2025 , 12 (1) . |
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Abstract ：
Heterogeneous catalytic ozonation (HCO) becomes a promising advanced oxidation process for water purification due to its strong portability and applicability. Although many efforts have been made to explore the radical-based catalytic mechanism in traditional HCO processes, they are susceptible to co-existing impurities in natural water. Hence, achieving non-radical and selective oxidation in the catalyst surface region is an important strategy to overcome this bottleneck and attain high chemical utilization efficiency. Despite a handful of studies having been conducted for the non-radical ozonation system, the associated mechanism has not been fully elucidated yet. In this perspective, the surface coordination species in different HCO catalysts are deliberately discussed, including (1) surface-adsorbed H2O or surface-OH, (2) surface-adsorbed oxygen species, and (3) surface-organic-O3 complex. The limitations and prospects of these surface coordination species in HCO were highlighted to arouse attention in future applications.
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| GB/T 7714 | Cheng, Yizhen , Chen, Zhonglin , Bi, Jinhong et al. Surface coordination species in heterogeneous catalytic ozonation for water purification [J]. | CELL REPORTS PHYSICAL SCIENCE , 2024 , 5 (11) . |
| MLA | Cheng, Yizhen et al. "Surface coordination species in heterogeneous catalytic ozonation for water purification" . | CELL REPORTS PHYSICAL SCIENCE 5 . 11 (2024) . |
| APA | Cheng, Yizhen , Chen, Zhonglin , Bi, Jinhong , Wang, Shaobin , Duan, Xiaoguang . Surface coordination species in heterogeneous catalytic ozonation for water purification . | CELL REPORTS PHYSICAL SCIENCE , 2024 , 5 (11) . |
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Activating peroxymonosulfate (PMS) to generate sulfate radicals (SO4 & sdot;-) is an effective method for water purification. An efficient, low-cost, and easily synthesized catalyst ensures decontamination performance and practical application feasibility. In this work, oxygen vacancy-enriched magnetic Co0.2FeOx was synthesized by isomorphous substitution of Fe3+ with Co2+ in alpha-FeOOH and employed to activate PMS to degrade iohexol, an iodinated X-ray contrast media widely detected in water. Co0.2FeOx exhibited higher performance than previously reported transition metal oxides. Iohexol could be effectively degraded in the Co0.2FeOx-catalyzed system from pH 3.5 to 10.5 compared to PMS oxidation alone. In situ tests in D2O and H2O using ATR-FTIR spectra inferred that the oxygen vacancies on the Co0.2FeOx surface could facilitate the formation of surface hydroxyl groups, which could complex HSO5- to form Me-(OH)-OSO3-. Electron transfer in the inner complex via the redox of Co(II)/Co(III) and Fe(III)/Fe(II) caused the breakage of the O-O bonds, thus promoting free radical generation. ESR spectra identified SO 4 & sdot;- and & sdot;OH as the predominant active species. This study suggests new ideas for the synthesis of efficient catalysts and elucidates new insights into the interfacial mechanism of PMS activation.
Keyword ：
Co 0.2 FeO x Co 0.2 FeO x Interfacial mechanism Interfacial mechanism Iohexol Iohexol Oxygen vacancy Oxygen vacancy Peroxymonosulfate Peroxymonosulfate
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| GB/T 7714 | Yan, Pengwei , Zhang, Ziliang , Wu, Wenyu et al. Improving peroxymonosulfate activation via surface-constructed oxygen vacancies on Co0.2FeOx for durable water decontamination [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 359 . |
| MLA | Yan, Pengwei et al. "Improving peroxymonosulfate activation via surface-constructed oxygen vacancies on Co0.2FeOx for durable water decontamination" . | SEPARATION AND PURIFICATION TECHNOLOGY 359 (2024) . |
| APA | Yan, Pengwei , Zhang, Ziliang , Wu, Wenyu , Chen, Zhonglin , Sun, Lianpeng , Ma, Fang et al. Improving peroxymonosulfate activation via surface-constructed oxygen vacancies on Co0.2FeOx for durable water decontamination . | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 359 . |
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