摘要
以自制Ti基SnO2/Sb2O3/IrO2镀层形稳电极(Dimensionless Stable Anode)为阳极,采用电催化氧化法处理模拟含酚废水.通过涂层分析和电化学性能测试表征了自制电极特性,考察了电解质类型和浓度、电流密度、苯酚初始浓度及体系初始pH值等因素对苯酚氧化过程的影响,并探讨其降解动力学规律.结果表明,自制电极是以SnO2为基础的纳米级固熔体氧化物电极且具有较好的表面结构,运行稳定性较好.苯酚的降解主要依赖于以NaCl为电解质时产生的氯系活性物质的间接氧化作用.随着电解质浓度及电流密度的增加,苯酚降解速率随之增大;而苯酚的初始浓度越大,降解速率越慢.体系初始pH对过程影响不明显.苯酚的降解过程符合一级反应动力学。
Using a home-made dimensionless stable anode（DSA） with Ti-base and SnO2 /Sb2O3 /IrO2-coating,electro-catalytic oxidation was applied to treat phenol wastewater.Through coatings analysis and electrochemical property test,the characteristics of DSA were investigated.And the effects on the phenol oxidation process of such factors as the type and concentration of electrolyte,current density,initial phenol concentration and initial pH,were studied to explore its degradation kinetics law.The results showed that the home-made electrode was a nano-scale SnO2-based solid-melt-oxide with a productive surface structure and high stability.The degradation of phenol mainly depended on the indirect oxidation of chlorine reactive substances produced with sodium chloride as the electrolyte.Degradation rate of phenol improved with the increasing electrolyte concentration and current density,while it decreased with higher initial phenol concentration.And the initial pH of the system had no obvious effect on the process.Phenol degradation process fitted first-order reaction.
出处
《环境化学》
CAS
CSCD
北大核心
2010年第6期1019-1026,共8页
Environmental Chemistry
基金
福建省重大科技项目(2006SZ010080044)
关键词
电催化氧化
苯酚
形稳电极
活性氯
动力学
electrocatalytic oxidation
phenol
dimensionless stable anode
active chlorine
kinetics.
