摘要
以邻氯苯酚为模型污染物探讨了直接阳极氧化,紫外光辐射联合阳极氧化和阴极还原3种电化学技术用于难生化污染物的削减.直接阳极氧化更适于有机物降解的预处理.提高电流虽能增加邻氯苯酚及其废水COD的去除速率,电流效率却降低.联合紫外光化学氧化后,光电一体化工艺存在协同效应,通过动力学参数计算了协同作用的增加因子.在阴极还原工艺中,通过合理的电化学反应器设计使得邻氯苯酚的氧化效率较直接阳极氧化有所提高.通过色谱分析简单揭示了邻氯苯酚在阳极氧化和阴极还原中的不同降解路径.
Application of three electrochemical techniques of direct anodic oxidation, anodic oxidation combined with UV radiation, and cathodic reduction for the abatement of biorefractory pollutants, was explored with o-chlorophenol as model pollutant. It was found that direct anodic oxidation was more suitable for pretreatment of organic matter degradation. Enhancement of the electric current could increase the removal rate of o-chlorophenol and COD of its wastewater; but the current efficiency was decreased. There existed synergetic effects in the technique combined with UV radiation, and the increase factor was calculated with kinetic parameters. In the cathodic reduction technique, the oxidation efficiency for o-chlorophenol was enhance, with rational design of electrochemical reactor, compared with that of direct anodic oxidation. The different degradation pathways of o-chlorophenol were revealed in the anodic oxidation and the cathodic reduction through chromatographic analysis.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2003年第3期225-229,共5页
China Environmental Science
基金
教育部留学人员科研基金资助项目(98679)
浙江省自然科学基金资助项目(200043)
关键词
邻氯苯酚降解
电化学
光电催化
协同效应
阴极还原
o-chlorophenol degradation
electrochemistry
photoelectrocatalysis
synergetic effects
cathodic reduction
