电催化降解含酚废水动力学及影响因素研究  

Study on Phenolic Wastewater Treatment Using Electro-catalysis:Kinetics and Influential Factors

作　　者：张延乐[1] 王立章[1] 胡云龙[1] 李鹏[1] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《环境科学与技术》2013年第11期121-124,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目(50908226);国家自然科学基金委员会创新研究群体科学基金(50921002)

摘　　要：采用填充床电化学反应器,以IrO2-Ta2O5/Ti为阳极,纯钛板为阴极,在室温条件下处理苯酚模拟废水。文章基于阶段反应理论,研究了填充床电化学系统降解苯酚废水的动力学模型,探讨了进水流速、电流密度、初始酚浓度等因素对模拟废水中苯酚和COD去除率的影响规律;在此基础上,对不同电流密度下的系统能耗进行分析。结果表明:当系统处于扩散控制阶段时,苯酚降解遵循一级反应动力学模型,在反应控制阶段属于零级反应;当起始苯酚浓度为600 mg/L(Na2SO43%),反应时间60 min,进水流速1.1 L/h,电流密度20 mA/cm2时,苯酚去除率可达99.92%,COD去除率为85.21%;随着电流密度增大,能耗提高。A bench scale experiment was conducted with a packed bed electrochemical reactor to treat phenol-containing wastewater,in which IrO2-Ta2O5was used as the anode,Ti as the cathode. The kinetic model of phenol degradation was analyzed and factors affecting removal rates of COD and phenol,such as water flow rate,current density,and initial concentration of phenol,were studied. The result showed that during the diffusion control stage,phenol degradation in the reactor followed the pseudo-first-order kinetic model,while during the reaction stage,the zero-order reaction model;and that phenol removal and COD removal could reach 99.92% and 85.21% respectively. In addition,as the current density increased,so did the energy consumption of the system.

关 键 词：含酚废水 填充床电化学反应器 动力学 能耗 

分 类 号：X703.1[环境科学与工程—环境工程] TQ035[化学工程]