MAWen-cheng,ZHANGJing-na,CHEN Jiong-leng,et al.Modified Electro-Fenton Technology for Degradation of Phenol-containing Wastewater Based on Carbon Fiber Brush Cathode[J].China Water & Wastewater,2023,39(11):104-108.
Modified Electro-Fenton Technology for Degradation of Phenol-containing Wastewater Based on Carbon Fiber Brush Cathode
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第11期
Page:
104-108
Column:
Date of publication:
2023-06-01
- Keywords:
- electro-Fenton; carbon fiber brush; hydroxyl radical; phenol
- Abstract:
- Aiming at problems of traditional electro?Fenton technology, such as large iron mud production and narrow application range of pH, the electro-Fenton system was established by using RuO-IrO2/Ti as the anode and carbon fiber brush as the cathode to degrade the target pollutant of phenol. The effects of current intensity, hydrogen peroxide concentration and initial pH on phenol degradation were investigated. The surface of the carbon fiber brush before and after the reaction was analyzed by scanning electron microscope (SEM). When the pH was 3, H2O2 concentration was 20 mmol/L, current was 200 mA and reaction time was 120 min, the degradation rate of phenol reached 96.46%, and the utilization rate of H2O2 reached 93.72%. The free radical capture experiments confirmed that the main active species of the electro-Fenton system was hydroxyl radical (·OH). It was speculated that carbon fiber brush had higher electron transfer efficiency or marginal active sites, thus accelerating H2O2 to produce ·OH. In addition, the cyclic test performance and correlation analysis showed that the carbon fiber brush had good chemical stability, and the degradation rate of phenol still reached more than 90% after 25 cycles.
Last Update:
2023-06-01