复极性粒子电-Fenton技术降解苯酚废水研究  

Combination Technology of Particle Electrodes with Electro-Fenton on the Degradation of Phenol Wastewater

作　　者：乔楠楠[1] 胡萌晓 马红竹[1] 

机构地区：[1]陕西师范大学化学化工学院,西安710119

出　　处：《硅酸盐通报》2014年第12期3325-3330,共6页Bulletin of the Chinese Ceramic Society

基　　金：中央高校基本科研业务费专项资金资助项目(GK201302013)

摘　　要：本研究采用电-Fenton/三维电极联合技术降解苯酚废水,利用铁改性膨润土(Fe-Bent)作为粒子电极,考察了溶液初始p H、苯酚初始浓度、电流密度、电极间距及电解质浓度等电化学体系操作条件对苯酚降解效果的影响;同时监测了反应过程中铁离子和羟基自由基浓度的变化情况。结果表明,溶液初始p H=3,电流密度125 m A/cm2,苯酚初始浓度100 mg/L,电极间距1.0 cm,电解质浓度0.05 mol/L,电解时间180 min时,苯酚的转化率可达到67.53%,COD去除率达57.11%。此时,溶液中铁离子的浓度为6.93 mg/L,沥出的铁离子较少,说明粒子电极较稳定。The treatment of phenol wastewater using bipolar particle electrodes coupled with electroFenton method,in which Fe modified bentonite（ Fe-Bent） was employed as the third electrode was studied. The influences of initial p H,initial concentration of phenol,electrolyte concentration,current density,space of anode and cathode were investigated. In addition,the change of iron ions and ·OH concentration with time were also monitored. The results showed that the optimal conditions are as follow：initial p H 3,current density 125 m A / cm2,phenol initial concentration 100 mg /L,space of anode and cathode 1. 0 cm,electrolyte concentration 0. 05 mol / L,electrolysis time 180 min,the phenol removal rate can reach 67. 53%,COD removal 57. 11%. At this time,the concentration of iron ion is 6. 93 mg /L,indicating that the particle electrode is stable.

关 键 词：电-FENTON 三维电极 苯酚 Fe-Bent 

分 类 号：X52[环境科学与工程—环境工程]