Antibiotic Resistant Bacteria Inactivation Through Electro-Fenton Disinfection with Carbon Catalysts and its Potential Risks

作     者：Zuo, XiaoJun Cao, WenXing Li, Yang Wang, Tao 

作者机构：Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Joint Laboratory of Atmospheric Pollution Control Nanjing210044 China School of Environment Engineering Wuxi University Wuxi214105 China 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Disinfection 

摘      要：Recently, increasing attention has been paid to the inactivation of antibiotic resistant bacteria (ARB) during electrochemical oxidation processes. However, no available information could be found on ARB inactivation during metal-free electro-Fenton (EF) disinfection. In this study, PVDF-based carbon catalyst (PPC) was chosen as the working electrode, and batch experiments were conducted to investigate key design for ARB inactivation, effects of water matrix and potential risks after the EF disinfection under the pre-determined conditions. ARB inactivation was the largest (5.0 log reduction for 40 min) through the used EF disinfection with current density at 2.25 mA/cm2 and Air/Water ratio of 10:1, which was in line with the profile and yield of H2O2 during the disinfection. Effects of water matrix analysis implied that ARB inactivation efficiencies during the EF disinfection in acidic solutions were better than the one in alkaline solutions under the optimal conductivity of 8000 μs/cm, which could be due to rich C=C levels on surface of PPC cathode. After the EF disinfection for 40 min, ARB counts increased slightly at the first 2 hr and then tended to disappear, and there were no ARGs conjugation transfer and little transformation, indicating that 40min of EF disinfection process was adequate to block the potential risk of ARB. Furthermore, the sequencing batch operation was more suitable for the inactivation of ARB by EF disinfection with carbon materials than the continuous operation. © 2022, The Authors. All rights reserved.