Department of Civil Engineering, Jami Institute of Technology, PO 8491963395, Isfahan, Iran.
Department of Chemical Engineering, Jami Institute of Technology, PO 8491963395, Isfahan, Iran.
Int J Environ Res Public Health. 2020 Mar 8;17(5):1758. doi: 10.3390/ijerph17051758.
Antibiotics are resistant to biodegradation, and their removal by biological processes is difficult. The purpose of this study was to investigate the removal of azithromycin from water using ultraviolet radiation (UV), Fe (VI) oxidation process and ZnO nanoparticles. The effect of different parameters such as pH, temperature, hydraulic retention time (HRT), the concentration of Fe (VI) and ZnO nanoparticles and UV intensity on the removal of azithromycin from water was investigated. The optimal conditions for the removal of azithromycin were a pH of 2, a temperature of 25 °C, a HRT of 15 min, and a ratio of ZnO nanoparticles to the initial concentration of azithromycin (A/P) of 0.00009 which was fitted by Langmuir isotherm. In addition, the optimal conditions for the removal of azithromycin using UV radiation were a pH of 7, a temperature of 65 °C, a HRT of 60 min, and UV radiation power of 163 mW/cm. For the Fe (VI) oxidation process, the optimal conditions were a pH of 2, a temperature of 50 °C and a HRT of 20 min. Also, the optimal ratio of Fe (VI) to the initial concentration of antibiotic was between 0.011 and 0.012. The results of this study showed that the Fe (VI) oxidation process, UV radiation, and ZnO nanoparticles were efficient methods for the removal of azithromycin from water.
抗生素难以生物降解，其生物去除过程较为困难。本研究旨在利用紫外线（UV）、六价铁（Fe（VI））氧化工艺和氧化锌纳米颗粒来去除水中的阿奇霉素。考察了不同参数，如 pH 值、温度、水力停留时间（HRT）、Fe（VI）和 ZnO 纳米颗粒浓度以及 UV 强度对水中阿奇霉素去除效果的影响。结果表明，去除水中阿奇霉素的最佳条件为：pH 值 2、温度 25°C、HRT 15min、ZnO 纳米颗粒与阿奇霉素初始浓度（A/P）比为 0.00009，该条件符合朗缪尔等温线。此外，采用 UV 辐射去除阿奇霉素的最佳条件为：pH 值 7、温度 65°C、HRT 60min、UV 辐射功率为 163mW/cm。对于 Fe（VI）氧化工艺，最佳条件为 pH 值 2、温度 50°C、HRT 20min。此外，Fe（VI）与抗生素初始浓度的最佳比值在 0.011 至 0.012 之间。研究结果表明，Fe（VI）氧化工艺、UV 辐射和 ZnO 纳米颗粒是去除水中阿奇霉素的有效方法。
