Abstract
We prepared a double-layer magnetic nanocomposite Fe3O4@ZIF-8@ZIF-67 by layer-by-layer self-assembly. Fe3O4@ZIF-8@ZIF-67 was used to remove tetracycline from an aqueous solution via a combination of adsorption and Fenton-like oxidation. Depending on the outstanding porous structure of the Fe3O4@ZIF-8@ZIF-67, a high adsorption capacity for tetracycline was 356.25mgg-1, with > 95.47% removal efficiency within 100min based on Fenton-like oxidation. To better understand the mechanisms involved in integrated adsorption and Fenton-like oxidation, various advanced characterization techniques were used to monitor the changes in morphology and composition of Fe3O4@ZIF-8@ZIF-67 before and after removal of tetracycline. Scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) all supported adsorption and Fenton oxidation of tetracycline. This study extends the application of Fe3O4@ZIF-8@ZIF-67 for environmental remediation.
Highlights
Antibiotic consumption has increased globally from usage in human and animal disease treatment, growth promotion, and prophylaxis (Kovalakova et al, 2020)
To better understand the mechanisms involved in integrated adsorption and Fenton-like oxidation, various advanced characterization techniques were used to monitor the changes in morphology and composition of Fe3O4@ZIF-8@ZIF-67 before and after removal of tetracycline
The as-prepared magnetic nanocomposite Fe3O4@ZIF-8@ZIF-67 is a potential material for TC removal from water in combination with adsorption and Fenton-like oxidation
Summary
Antibiotic consumption has increased globally from usage in human and animal disease treatment, growth promotion, and prophylaxis (Kovalakova et al, 2020). Most ingested antibiotics are released into the aquatic environment instead of being metabolized by organisms (Kraemer et al, 2019). Tetracycline (TC), which ranks second in terms of global production and usage, was discovered in the 1940s (Jeong et al, 2010). Recent results suggest that the concentration of TC in surface water is ~ 0.15 ug L− 1 (Guo et al, 2017). Environmental TC residues may destroy ecosystems and result in the development of antibiotic resistant bacteria (ARB) (Wang et al, 2020). It is critical and urgent to remove TC from the aquatic environment
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