摘要：

电Fenton是电化学与Fenton技术相结合的一种高级氧化技术，具有铁泥产量少、无需投加H₂O₂等优点。电Fenton过程中O₂在阴极发生还原反应生成H₂O₂，再与Fe²⁺反应生成强氧化性的·OH，达到降解污染物的目的。阴极材料对电Fenton技术降解效果有一定影响。以硫酸和苯胺为原料，通过电聚合法改性石墨毡，研究了改性石墨毡（GF-N）的物理化学性能，并将其用于电Fenton降解印染废水实验。FT-IR、扫描电镜、接触角分析结果表明，GF-N表面成功负载上聚苯胺，含氧官能团增加，比表面积增大，接触角变小。实验结果表明，GF-N的吸附性能和产H₂O₂性能明显增强，120 min时，H₂O₂质量浓度从111 mg/L增加到158 mg/L，且稳定性较好。以石墨毡为阴极构建电Fenton体系降解印染废水，120 min时，GF-N阴极电Fenton体系的COD、氨氮去除率分别为56.76%和78.32%，相比未改性体系，COD、氨氮去除率分别增加了20.47%、33.30%。

关键词: 聚苯胺, 石墨毡, 电Fenton, 印染废水

Abstract:

As an advanced oxidation technology combining electrochemistry and Fenton technology， electro-Fenton technology has the advantages of low iron sludge production and no H₂O₂ injection. In the process of electro-Fenton， oxygen is reduced at the cathode to produce H₂O₂， which then reacts with Fe²⁺ to produce ·OH for degrading pollutants. The cathode material has a certain influence on the degradation effect of electro-Fenton technology. The physical and chemical properties of modified graphite felt（GF-N） were modified by electropolymerization using sulfuric acid and aniline as raw materials， and it was used in the experiment of electro-Fenton degradation of printing and dyeing wastewater. FT-IR， SEM and contact angle analysis results showed that the surface of GF-N was successfully loaded with polyaniline， and the oxygen-containing functional groups， the specific surface area increased， while the contact angle decreased. The experimental results showed that the adsorption and H₂O₂ production performance of GF-N were significantly enhanced. H₂O₂ mass concentration increased from 111 mg/L to 158 mg/L at 120 min with good stability. The electro-Fenton system was constructed by using graphite felt as the cathode to degrade the printing and dyeing wastewater. At 120 min， the COD and ammonia nitrogen removal rates of electro-Fenton system with GF-N as the cathode were 56.76% and 78.32%， respectively， which increased 20.47% and 33.30%， compared with the unmodified system.

Key words: polyaniline, graphite felt, electro-Fenton, printing and dyeing wastewater

中图分类号: 

• X703.1