Lv Hongxia, Han Peiwei, Li Xiaogang, Mu Zhao, Zuo Yuan, Wang Xu, Tan Yannan, He Guangxiang, Jin Haibo, Sun Chenglin, Wei Huangzhao, Ma Lei
Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, School of Energy Science and Engineering, University of Science and Technology of China, Guangzhou 510640, China.
Materials (Basel). 2021 Nov 11;14(22):6814. doi: 10.3390/ma14226814.
Presently, in the context of the novel coronavirus pneumonia epidemic, several antibiotics are overused in hospitals, causing heavy pressure on the hospital's wastewater treatment process. Therefore, developing stable, safe, and efficient hospital wastewater treatment equipment is crucial. Herein, a bench-scale electrooxidation equipment for hospital wastewater was used to evaluate the removal effect of the main antibiotic levofloxacin (LVX) in hospital wastewater using response surface methodology (RSM). During the degradation process, the influence of the following five factors on total organic carbon (TOC) removal was discussed and the best reaction condition was obtained: current density, initial pH, flow rate, chloride ion concentration, and reaction time of 39.6 A/m, 6.5, 50 mL/min, 4‱, and 120 min, respectively. The TOC removal could reach 41% after a reaction time of 120 min, which was consistent with the result predicted by the response surface (40.48%). Moreover, the morphology and properties of the electrode were analyzed. The degradation pathway of LVX was analyzed using high-performance liquid chromatography-mass spectrometry (LC-MS). Subsequently, the bench-scale electrooxidation equipment was changed into onboard-scale electrooxidation equipment, and the onboard-scale equipment was promoted to several hospitals in Dalian.
目前，在新型冠状病毒肺炎疫情背景下，医院中几种抗生素被过度使用，给医院污水处理过程带来巨大压力。因此，开发稳定、安全、高效的医院污水处理设备至关重要。在此，采用响应面法（RSM），使用一套实验室规模的医院污水电氧化设备评估医院污水中主要抗生素左氧氟沙星（LVX）的去除效果。在降解过程中，讨论了电流密度、初始pH值、流速、氯离子浓度和反应时间这五个因素对总有机碳（TOC）去除的影响，并得出最佳反应条件：分别为39.6 A/m、6.5、50 mL/min、4‱ 和120 min。反应120 min后，TOC去除率可达41%，这与响应面预测结果（40.48%）一致。此外，分析了电极的形态和性能。使用高效液相色谱 - 质谱联用仪（LC - MS）分析了LVX的降解途径。随后，将实验室规模的电氧化设备改造成车载规模的电氧化设备，并将该车载规模设备推广至大连的几家医院。
