电生过氧化氢联合零价铁体系降解左氧氟沙星
Electrogenic hydrogen peroxide combined with nanoscale zero-valent iron for levofloxacin degradation
王春峰 1彭婧芳 1曹芳源 1皮运清 1李琦璐 1闫旭 1沈锦优2
作者信息
- 1. 黄淮水环境与污染控制重点实验室(河南师范大学),河南师范大学 环境学院,河南 新乡 453007
- 2. 南京理工大学 环境与生物工程学院,江苏 南京 210094
- 折叠
摘要
为了探究不同电极材料电生过氧化氢(H2O2)的性能及机理,选择石墨、钛、不锈钢和铱钽作为阴极材料,联合零价铁(nZVI)进行了左氧氟沙星(LVF)的降解实验.考察不同阴极材料在不同pH下电生过氧化氢的性能,并以石墨作为阴极材料,探究了离子对电生H2O2 的影响及LVF的降解机理.结果表明,当石墨作为阴极材料,电生H2O2 的性能最好,且 H2O2 通过单电子途径和双电子途径生成.当 pH=3 时,石墨作为阴极可通过产生羟基自由基(·OH)和电子直接转移(DET)有效降解LVF.实验证明石墨作为阴极可有效降解LVF,并高效产生H2O2,为电生过氧化氢的类芬顿技术提供数据支持.
Abstract
To explore the properties and mechanism of electrogenic hydrogen peroxide(H2O2)on different electrode materials,graphite,titanium,stainless steel,and iridium tantalum were selected as cathode materials,and levofloxacin(LVF)degradation experiments were carried out in combination with zero-valent iron(nZVI).The properties of electrogenic hydrogen peroxide at different pH on different cathode materials were investigated,and graphite was used as the cathode material to study ions effects on electrogenic H2O2 and the degradation mechanism of LVF.The results show that electrogenic H2O2 has the best performance when graphite is used as the cathode material,and H2O2 is generated by single-electron and two-electron pathways.At pH=3,graphite can effectively degrade LVF by forming·OH and electron direct transfer(DET).The experimental results show that graphite as a cathode can effectively degrade LVF and efficiently produce H2O2,which provides data for the Fenton-like technology of electrogenic hydrogen peroxide.
关键词
电生过氧化氢/电极/零价铁/左氧氟沙星Key words
electro-generated H2O2/electrode/zero valent iron/levofloxacin(LVF)引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据