Electro-Fenton is a promising advanced oxidation process for the treatment of emerging contaminants from water bodies. Here, we developed a robust and affordable flow-through electro-Fenton process to degrade antibiotic tetracycline. The key component of this technology is an electroactive and porous carbon nanotube filter functionalized with FeOCl. These nanoscale FeOCl significantly promoted the generation of HO• by facilitating efficient cycling of Fe³⁺/Fe²⁺. Electrochemical filtration of 0.04 mM tetracycline at −0.8 V vs. Ag/AgCl and a flow rate of 1.5 mL min⁻¹ resulted in an oxidative flux of 5.32 ± 0.41 mmol h⁻¹ m⁻². Relative to conventional batch reactor, the proposed system showed enhanced tetracycline degradation kinetics because of the convection-enhanced mass transport. The underlying working mechanism of the system was proposed based on various advanced assessments and density functional theory calculations. This study should offer new insights about the rational design of continuous-flow systems towards efficient removal of various contaminants.

电子芬顿是一种有前途的先进氧化工艺，用于处理水体中新兴的污染物。在这里，我们开发了一种功能强大且价格合理的流通式电子芬顿工艺，以降解抗生素四环素。该技术的关键组件是用FeOCl功能化的电活性和多孔碳纳米管过滤器。这些纳米级FeOCl通过促进Fe ³⁺ / Fe ^2+的有效循环而显着促进了HO•的生成。在-0.8 V 0.04毫四环素的电化学过滤VS。Ag / AgCl和1.5 mL min ^-1的流速导致的氧化通量为5.32±0.41 mmol h ^-1  m ^-2。相对于常规间歇式反应器，由于对流增强了传质，所提出的系统显示出增强的四环素降解动力学。基于各种高级评估和密度泛函理论计算，提出了系统的基本工作机制。这项研究应为有效去除各种污染物的连续流系统的合理设计提供新的见解。