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Keywords: computational fluid dynamics; degradation; Swirling vortex cavitator; tetracycline EN computational fluid dynamics degradation Swirling vortex cavitator tetracycline 955 963 9 09/20/22 20220901 NES 220901 1 Introduction Antibiotics are commonly utilized for treatment and prevention of deadly infections in humans and animals. Nevertheless, the absolute degradation amount of tetracycline at higher initial concentration of tetracycline was larger than that of tetracycline at low concentration owing to the fuller utilization of hydroxyl radicals. When the initial concentration of tetracycline increases, the degradation efficiency of tetracycline decreases accordingly due to the limited amount of tetracycline degradation. 3.5 Degradation of tetracycline at different reaction times Figure 10 shows the degradation efficiency of tetracycline by the vortex cavitator at different degradation times. [Extracted from the article]