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- W4210293813 endingPage "134916" @default.
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- W4210293813 abstract "• ZIF-67 was fixed into zeolite beads stably with macroscopic architecture. • Co ion-exchange and organic ligand reaction were used to prepare this composites. • Zeolite@ZIF-67 composites were applied for PMS activation to degrade tetracycline. • Lower Co ion leakage and good recycling capacity were achieved. • Tetracycline was effectively removed in both static and continuous flow processes. Heterogeneous peroxymonosulfate (PMS) based advanced oxidation process has been proven as a promising method for tetracycline removal from water. Among the heterogeneous catalysts, Co based metal–organic framework (ZIF-67) is a good candidate to activate PMS in the aforementioned advanced oxidation system. However, their high metal ion leaching and fine powder form limit their practical application. Herein, zeolite bead-supported ZIF-67 was prepared through the Co ion-exchange and organic ligand reaction, which is simple, cost-efficient and recyclable. The obtained zeolite@ZIF-67 composites were employed for PMS activation to degrade tetracycline in the water. The uniform ZIF-67 loading could provide abundant catalytic sites and the results demonstrated that 93.7% of tetracycline (50 mg/L) could be removed in 60 min with high recycling stability. Intriguingly, due to the strong metal-support interaction, the Co ion leaching from the composite beads during the degradation reaction was much lower compared to pure ZIF-67 particles. In addition, zeolite@ZIF-67 composites with the microsphere form could be easily packed into the bed column to effectively remove tetracycline in a continuous flow process. The degradable mechanism and degradation pathway were comprehensively investigated by quenching experiments, electron paramagnetic resonance spectra, X-ray photoelectron spectroscopy and liquid chromatography-mass spectroscopy. Overall, our work provides a novel PMS heterogeneous catalyst based on macroscopic supported MOF composites for efficient tetracycline removal." @default.
- W4210293813 created "2022-02-08" @default.
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- W4210293813 date "2022-05-01" @default.
- W4210293813 modified "2023-10-06" @default.
- W4210293813 title "Stable metal–organic framework fixing within zeolite beads for effectively static and continuous flow degradation of tetracycline by peroxymonosulfate activation" @default.
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- W4210293813 doi "https://doi.org/10.1016/j.cej.2022.134916" @default.
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