钴基气体扩散电极强化电芬顿处理磺胺噻唑钠  

Cobalt-based gas diffusion electrodes enhance the E-Fenton for sulfathiazole sodium treatment

作　　者：谢谨裕 王卓雯 高伟杰 邓凤霞 邱珊 XIE Jin-yu;WANG Zhou-wen;GAO Wei-jie;DENG Feng-xia;QIU Shan(School of Environment,State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]哈尔滨工业大学,环境学院,城市水资源与水环境重点实验室,黑龙江哈尔滨150090

出　　处：《中国环境科学》2023年第1期122-131,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(52000052,52070056);城市水资源与水环境国家重点实验室(哈尔滨工业大学)自主课题(2020TS04);河北省省级科技计划资助项目(20373602D);黑龙江省联合引导项目(LH202E054)。

摘　　要：制备钴氧化物掺杂的碳氮气体扩散电极(Co-CN-GDE)强化电芬顿体系抗生素降解效能.引入CoOx后,Co-CN-GDE界面反应电荷阻力降低,氧强度提高,促进HO·等活性物质生成.将其应用于磺胺噻唑钠(STZ)废水处理,20min内随钴掺杂比例从0增加至1/5,反应动力学常数从0.008min^(-1)提升至0.243min^(-1),STZ降解率从76.94%提升至98.99%.同时生物毒性实验证明新电芬顿体系对STZ有去毒作用.最后,通过超高效液相色谱-串联质谱检测STZ降解过程中的产物,得出STZ主要降解路径为α,β和γ键断裂.本文为解决微区强碱环境催化剂还原受阻进一步提高气体扩散电极处理抗生素废水能力提供解决思路.A cobalt oxide-doped carbon and nitrogen-based gas diffusion electrodes(Co-CN-GDE)were prepared,intending to enhance the degradation rate of antibiotic wastewater in the electro-Fenton process(EF).The interface reaction charge resistance of the Co-CN-GDE was reduced coupled with an enhancement of oxygen intensity after introduction of CoOx.It resulted in an obvious promotion of the active oxygen species,such as HO·.As the Co-CN-GDE EF was adapted to the treatment of sodium sulfathiazole(STZ)wastewater,the reaction kinetic constant increased from 0.008min^(-1)to 0.243min^(-1),and the degradation rate of STZ increased from 76.94%to 98.99%with the proportion of cobalt doping increased from 0 to 1/5 within 20min.Biotoxicity experiments proved that EF had a detoxifying effect.Finally,the intermediates of STZ were detected by Ultra performance liquid chromatography-mass spectrometry.Degradation of STZ were mainly throughα,β,γbond fracture.Therefore,this study provides a new idea to alleviate the slow iron reduction rate in micro-area strong alkali environment in EF,and further strengthen the ability of gas diffusion electrode to treat antibiotic wastewater.

关 键 词：电芬顿 气体扩散电极 抗生素 CoOx 氧化效能 

分 类 号：X703.1[环境科学与工程—环境工程]