基于气体扩散电极的电芬顿技术去除水中抗生素的研究进展

Research progress on antibiotics removal in wastewater by electro-Fenton based on gas diffusion electrodes

最大限度地减少抗生素对环境的负面影响是一项巨大的挑战,而高效产H_(2)O_(2)的气体扩散电极(gas diffusion electrodes,GDEs)在电芬顿技术去除水中抗生素中具有很大的需求.GDEs作为电芬顿阴极对H_(2)O_(2)的电合成有更高的氧利用率、低能耗和高成本效益,已在抗生素废水处理的关键基础研究中得到了很好的发展.在本文中,介绍了电芬顿-H_(2)O_(2)法的基本原理,重点关注了GDEs作为电芬顿阴极的研究现状,并着重分析改性方式.同时,对GDEs与反应器装置组合的H_(2)O_(2)合成效率进行总结.此外,研究了通过GDEs高效合成H_(2)O_(2)的电芬顿体系对水中磺胺类、喹诺酮类、β-内酰胺类和四环素类等四大类抗生素的去除效果和降解机制,为GDEs应用于电芬顿体系的深入研究提供参考.最后,分析和展望了GDEs在H_(2)O_(2)生产和水处理的应用前景.

Minimize the negative impact of antibiotics to the environment is a huge challenge,high efficiency H_(2)O_(2) production of gas diffusion electrode(GDEs)is in great demand for the removal of antibiotics from water by electro-Fenton technology.As an electro-Fenton cathode,GDEs has a higher oxygen utilization rate,low energy consumption and low costfor the electrosynthesis of H_(2)O_(2).Ithas been well developed in the key basic research of antibiotic wastewatertreatment.In this review,we introduce the basic principle of electro-Fenton-H_(2)O_(2) method,focus on the research status of GDEs as electro-Fenton cathode,and analysis the modification methods of cathode.At the same time,the H_(2)O_(2) synthesis efficiency of GDEs combined with reactor unit was summarized.In addition,we studied the removal effect and degradation mechanism of sulfonamides,quinolones,β-lacamides and tetracyclines in water by electro-Fenton system with high efficiency synthesis H_(2)O_(2) by GDEs,so as to provide a reference for further study of the application of GDEs in electro-Fenton system.Finally,the application of GDEs in H_(2)O_(2) production and water treatment is analyzed and prospected.