Gu Xuege, Li Junfeng, Feng Xueting, Qu Wenying, Wang Wenhuai, Wang Jiankang
College of Water Conservancy and Architectural Engineering, Shihezi University Shihezi 832000 PR China
RSC Adv. 2023 Mar 17;13(13):8944-8954. doi: 10.1039/d3ra00471f. eCollection 2023 Mar 14.
In this study, we developed an airlift-electrocoagulation (AL-EC) reactor to remove norfloxacin (NOR) from water. Six parameters influencing NOR removal were investigated, and the possible removal mechanism was proposed based on flocs characterization and intermediates analysis. The performances for treating different antibiotics and removing NOR from 3 types of water were also evaluated. The best NOR removal efficiency was obtained with the iron anode and aluminum cathode combination, a current density of 2 mA cm, an initial pH of 7, a treatment time of 32 minutes and an air flow rate of 200 mL min, the supporting electrolyte type was NaCl, and the initial NOR concentration was 10 mg L. Flocs adsorption and electrochemical oxidation were the main ways to remove NOR from water. The average removal efficiency of the AL-EC reactor exceeded 60% of the different antibiotic concentrations in artificial and real water. The highest NOR removal rate reached 93.48% with an operating cost of 0.153 USD m. The present work offers a strategy for NOR removal from water with high efficiency and low cost, showing a huge potential for the application of the AL-EC in antibiotic contaminated water treatment.
在本研究中，我们开发了一种气升式电凝（AL-EC）反应器用于去除水中的诺氟沙星（NOR）。研究了影响NOR去除的六个参数，并基于絮体表征和中间体分析提出了可能的去除机制。还评估了该反应器处理不同抗生素以及从三种类型水中去除NOR的性能。采用铁阳极和铝阴极组合、电流密度为2 mA/cm²、初始pH为7、处理时间为32分钟、空气流速为200 mL/min、支持电解质类型为NaCl且初始NOR浓度为10 mg/L时，获得了最佳的NOR去除效率。絮体吸附和电化学氧化是从水中去除NOR的主要方式。AL-EC反应器对人工水和实际水中不同抗生素浓度的平均去除效率超过60%。最高NOR去除率达到93.48%，运行成本为0.153美元/m³。本研究为高效低成本去除水中NOR提供了一种策略，显示出AL-EC在抗生素污染水处理中的巨大应用潜力。
