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

为了探究不同电极材料电生过氧化氢(H_(2)O_(2))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H_(2)O_(2)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H_(2)O_(2)的性能最好,且H_(2)O_(2)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H_(2)O_(2),为电生过氧化氢的类芬顿技术提供数据支持。

To explore the properties and mechanism of electrogenic hydrogen peroxide(H_(2)O_(2))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 H_(2)O_(2) and the degradation mechanism of LVF.The results show that electrogenic H_(2)O_(2) has the best performance when graphite is used as the cathode material,and H_(2)O_(2) is generated by single-electron and two-electron pathways.At pH=3,graphite can effectively degrade LVF by formingOH and electron direct transfer(DET).The experimental results show that graphite as a cathode can effectively degrade LVF and efficiently produce H_(2)O_(2),which provides data for the Fenton-like technology of electrogenic hydrogen peroxide.