Enhanced Degradation of Aspirin by Electrochemical oxidation with Modified PbO₂ Electrode and Hydrogen Peroxide

摘要

The degradation of aspirin was performed by electrochemical oxidation with a novel modified PbO2electrode assisted by H2O2. The effects of electrolyte concentration, current density, initial aspirinconcentration and H2O2 concentration on the aspirin degradation were examined in this study. Underan optimized condition, the removal of aspirin concentration, COD and TOC after 150 minutestreatment reached 94%, 81% and 61%, respectively. It was found that H2O2 was effective to acceleratethe organic pollutants degradation. Based on the degradation intermediates detected by IC and GC-MS,a possible degradation mechanism of aspirin was proposed.