类电Fenton降解有机偶氮染料媒介黄10  

Degradation of Azo-organic Dye Mordant Yellow 10 by Electro-Fenton-like System

作　　者：刘栓[1] 王攀[1] 陈登霞[1] 赵小蓉[1] 黄应平[1] 

机构地区：[1]三峡大学三峡库区生态环境教育部工程研究中心,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2010年第3期90-93,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：国家重点基础研究发展计划973前期研究课题(2008CB417206);国家自然科学基金项目(20877048);湖北省青年杰出人才基金资助项目(2005ABB030)

摘　　要：以二氧化锰复合石墨(MnO2@graphite)电极为阴极,铂网为阳极,研究了在pH7.0条件下降解媒介黄10(MY10)的类电Fenton反应特性.结果表明,4.7×10-5mol/L媒介黄10在外加电压6.0 V和支持电解质Na2SO410 g/L条件下,反应120 min,MY10脱色率达100%.通过紫外-可见光谱(UV-Vis),傅里叶红外光谱(FTIR)分析和总有机碳(TOC)测定,研究了类电Fenton体系深度氧化(矿化)MY10程度,表明,电Fenton反应4h MY10的矿化率达79.1%.通过对类电Fen-ton体系原位循环伏安参数测定及过氧化物酶催化反应吸光光度法和苯甲酸荧光分析法跟踪测定类电Fenton体系降解MY10过程中H2O2和·OH的变化,表明MY10降解过程涉及·OH历程.The degradation reaction characteristics of mordant yellow 10（MY10） in the neutral pH electro-Fenton-like system which MnO2@graphite worked as cathode and platinum net as anode were studied.It was found that 100% decolorization of 4.7×10-5 mol/L MY10 was achieved in 120 min with applied voltage of 6 V and supporting electrolyte of 10g/L Na2SO4,based on the electro-Fenton-like reaction.The deep degradation process of MY10 was studied by UV-visible spectrum（UV-vis）,FTIR and total organic carbon（TOC）.The findings showed that MY10 was degraded effectively with the mineralization ratio of MY10 79.1% in 4 h.Moreover,in order to investigate the degradation mechanism of the target compound,the electrochemical characteristics of the electrode was determined by in situ cyclic voltammetry;and the variations of hydrogen peroxide and hydroxyl radical during the degradation were traced by enzyme catalysis method and fluorescence spectrometry.The results showed that the degradation process involved hydroxyl radical course.

关 键 词：类电Fenton 双氧水 羟基自由基 媒介黄10 

分 类 号：O657.3[理学—分析化学] X791[理学—化学]