碳毡电极用于电芬顿脱色性能及机理研究  

Study on Performance and Mechanism of Dye Decolorization by Electro-Fenton with Carbon Felt Cathode

作　　者：卢素敏[1] 李献朋 尹良珂 张松松 LU Sumin;LI Xianpeng;YIN Liangke;ZHANG Songsong(School of Chemistry and Chemical Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学化学工程与技术学院,天津300387

出　　处：《水处理技术》2023年第8期55-59,65,共6页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(91745116)。

摘　　要：为了探究CF电极在电芬顿脱色中的应用性能及机理,通过对阴极材料的对比,建立了以碳毡为阴极的电芬顿降解体系,探讨了不同操作参数如废液pH、O_(2)流量、电压、Fe^(2+)浓度等因素对活性红195染料废水的脱色率、COD去除率的影响。根据实验结果,采用碳毡做阴极,Fe^(2+)浓度为20 mg/L,pH为3、O_(2)流量60 mL/min、电压3 V条件下,反应3 h染料几乎完全脱色,COD去除率可达73.31%;利用猝灭实验初步探讨了染料降解的主要机制,•OH的生成及其强氧化作用是染料降解的主要因素;利用UV-Vis及GC-MS对染料降解机理进行了分析,发现反应前30 min降解速度最快;电极稳定性实验及扫描电子显微镜(SEM)形貌分析证明了碳毡阴极具有良好的电化学稳定性。To explore the application performance and mechanism of carbon felt(CF)electrode in electro-Fenton decolorization,an electro-Fenton degradation system with CF as the cathode was developed through the comparison of different cathode materials.The effects of different operating parameters such as pH,O_(2)flow rate,voltage,Fe^(2+)concentration on the decolorization rate and COD removal rate of reactive red 195 wastewater were discussed.From the experimental results,with CF as the cathode,the dye wastewater was almost completely decolorized,and the COD removal rate could reach 73.31%after 3 h at Fe^(2+)concentration of 20 mg/L,pH of 3,O_(2)flow rate of 60 mL/min,and voltage of 3 V.The main mechanism of dye degradation was preliminarily discussed by quenching experiments.The formation of•OH and its strong oxidation were the main factors for dye degradation.The dye degradation mechanism was analyzed by UV-Vis and GC-MS,and it was found that the degradation rate was the fastest in the first 30 min.Stability experiment of electrode and scanning electron microscope(SEM)morphology analysis proved that the CF cathode had good electrochemical stability.

关 键 词：电芬顿 阴极材料 降解机制 脱色率 COD去除率 

分 类 号：O646[理学—物理化学]