电压波形对三维电极法降解苯酚的影响  

Effect of voltage waveforms on the degradation of phenol by three-dimensional electrodes

作　　者：王兵[1,2] 王波[1] 任宏洋[1,2] 罗东宁 

机构地区：[1]西南石油大学化学化工学院,成都610500 [2]西南石油大学环境保护油气田污染防治与环境安全重点实验室,成都610500 [3]中原油田普光分公司HSE监督管理部,达州635000

出　　处：《环境化学》2015年第5期983-988,共6页Environmental Chemistry

基　　金：十二五国家科技支撑计划项目(2011BAC06B05)资助

摘　　要：研究了三维电极在不同电压波形下处理苯酚废水的电能消耗、降解历程以及工艺条件.结果表明,其他处理条件相同时,方波脉冲电压的降解效率比直流电压平均高出10%.随着苯酚去除率从30%增加到90%,方波脉冲电压节省的电能从0.09 k W·h·kg-1苯酚升高到1.54 k W·h·kg-1苯酚.与常规直流电压相比,脉冲电压对粒子电极复极化程度更高,粒子端电压和工作电流都随粒子间距的增大而增大.采用气质联用仪分析,方波脉冲电压能将苯酚降解为丙二酸、丁烯酸等分子量更小的有机物,降解更为彻底.电解处理苯酚废水最佳条件为:方波槽电压15 V、占空比30%、频率2 k Hz、处理时间50 min,此时苯酚最大去除率为89%.The energy consumption, degradation process and treatment condition of phenol by a three-dimensional electrode under different voltage waveforms were investigated. The results show that the removal efficiency of square-wave pulse voltage was 10% higher than that of DC voltage. Compared with the conventional DC voltage, the saved energy increased from 0.09 kW·h·kgphenol^-1 to 1.54 kW·h·kgphenol^-1 when phenol removal rate rose from 30% to 90%. Higher repolarization extent of particle electrode was obtained using square-wave pulse voltage. The terminal voltage and current increased with the expansion of particle spacing. Based on the analysis of the GC-MS, it was concluded that, through square-wave pulse voltage processing, phenol was degraded into organic compounds with small molecular weight, such as malonic acid, and crotonic acid. Under the optimal electrolytic condition with voltage 15 V, duty cycle 30%, frequency 2 kHz, electrolytic time 50 min, the maximum removal rate of phenol was 89%.

关 键 词：三维电极 苯酚废水 电压波形 能耗 占空比 

分 类 号：X783[环境科学与工程—环境工程]