CuFeKao粒子电极三维非均相电Fenton体系降解亚甲基蓝  

Degradation of methylene blue by three-dimensional heterogeneous electro-Fenton system with CuFeKao particle electrode

作　　者：陈越 彭雪儿 周琛阳 李婧 孟欣怡 高丽丽[1] CHEN Yue;PENG Xueer;ZHOU Chenyang;LI Jing;MENG Xinyi;GAO Lili(School of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西晋中030600

出　　处：《工业水处理》2025年第2期54-62,共9页Industrial Water Treatment

基　　金：山西省自然科学研究面上项目(202203021211150);山西省重点研发项目(201803D31050)。

摘　　要：采用溶胶-凝胶法合成CuFe_(2)O_(4)/Fe_(2)O_(3)/Kaolin(CuFeKao)催化粒子电极,并将其应用于三维非均相电Fenton(3D/EF)体系降解亚甲基蓝(MB)。XRD结果表明,CuFeKao是由CuFe_(2)O_(4)、Fe_(2)O_(3)和高岭土(Kaolin)构成的复合材料。通过对比实验发现三维电化学作用可以提高H_(2)O_(2)的产量,非均相电Fenton体系可以催化H_(2)O_(2)原位转化为·OH。与以CuFe_(2)O_(4)/Fe_(2)O_(3)或Kaolin为粒子电极的3D体系和2D体系相比,3D/EF/CuFeKao体系表现出最大的·OH产率和最佳的MB降解率。通过单因素实验对3D/EF/CuFeKao体系的降解条件进行优化,在优化条件下反应60 min,MB和TOC的去除率分别可达99.81%和58.13%。自由基猝灭实验证实体系含·OH和O_(2)·-两种活性氧物种(ROS),其相对占比可通过溶液pH进行调控。机理分析表明,3D/EF/CuFeKao体系降解MB的主要机理是发生在CuFeKao粒子电极表面的非均相电Fenton作用。CuFe_(2)O_(4)/Fe_(2)O_(3)/Kaolin(CuFeKao)catalytic particle electrode was synthesized by sol-gel method and used in three-dimensional heterogeneous electro-Fenton system to degrade Methylene blue(MB).XRD results showed that CuFeKao was a composite material composed of CuFe_(2)O_(4),Fe_(2)O_(3) and Kaolin.Through comparative experiments,it was found that three-dimensional electrochemical interactions could increase the yield of H_(2)O_(2),and heterogeneous electro-Fenton systems could catalyze the in-situ conversion of H_(2)O_(2) to·OH.Compared with 3D systems using CuFe_(2)O_(4)/Fe_(2)O_(3) or Kaolin as particle electrode and 2D systems,the 3D/EF/CuFeKao system exhibited the highest·OH yield and the best MB degradation effect.The degradation conditions of the 3D/EF/CuFeKao system were opti-mized by single factor experiments.Under the optimized conditions,the removal rates of MB and TOC could reach 99.81%and 58.13%respectively after 60 minutes of reaction.The quenching of free radicals confirmed that the sys-tem contained two reactive oxygen species,·OH and O_(2)·-,whose relative proportions could be regulated by solution pH.Mechanism analysis showed that the main mechanism of MB degradation in the 3D/EF/CuFeKao system is the heterogeneous electro-Fenton reaction occurring on the surface of the CuFeKao particle electrode.

关 键 词：铜铁双金属 高岭土 三维非均相电Fenton 亚甲基蓝 

分 类 号：X703[环境科学与工程—环境工程]