摘要：

电催化氧化技术是水处理领域的一门新兴技术,具有环境兼容性好的优势。采用Ir-Ta-Sn掺杂电极作阳极、不锈钢电极作阴极处理垃圾渗滤液,并考察极板间距、电催化氧化电压、起始pH和电催化氧化时间对电解效果的影响。实验结果表明,酸性条件下进行降解较有利;极板电压和极板间距对降解效果均有不同程度的影响;电解时间超过4 h时,对COD的降解没有显著影响。当pH为3、极板电压为24~36 V、极板间距为1.5~2.0 cm及反应时间为4 h时,对垃圾渗滤液的COD去除率可达50%左右。

关键词: Ir-Ta-Sn掺杂电极, 电催化氧化, 垃圾渗滤液

Abstract:

Electric catalytic oxidation technology is an emerging technology in the field of water treatment,which has good environmental compatibility. The Ir-Ta-Sn doping electrode as anode and stainless steel electrode as cathode have been used for treating landfill leachate. The effects of the plate distance,electric catalysis oxidation voltage,the initial pH and the electric catalytic oxidation time have been investigated. The experimental results show that acidic condition is more advantageous for the degradation of COD. The degradation effect is affected by both of the plate voltage and plate distance to different degrees. The degradation of COD is not significantly affected when the electrolysis time is longer than four hours. When the initial pH is 3,the plate voltage 24-36 V,plate spacing 1.5-2.0 cm,and reaction time 4 hr,the COD removing rate from landfill leachate can reach about 50%.

Key words: Ir-Ta-Sn doping electrode, electric catalytic oxidation, landfill leachate

中图分类号: 

• X703.1