氯离子对氨氮电化学氧化的影响  

Effect of chloride ion on ammonia electrochemical oxidation

作　　者：朱艳[1] 汪家权[1] 陈少华[1] 胡洁[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009

出　　处：《环境工程学报》2013年第7期2619-2623,共5页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2012ZX07103-004)

摘　　要：以自制的二氧化铅粉末多孔电极为阳极,不锈钢为阴极,探讨了投加Cl-对氨氮电化学氧化反应速率、途径及产物等的影响。结果表明,投加Cl-能显著提高氨氮的电化学氧化速率;有氯离子存在的条件下,氨氮的去除主要靠电催化过程中产生的强氧化性物质.OH,HClO的作用,其去除率随着电流密度的增大呈增高的趋势,随初始pH的增大而增大;投加氯离子后,NO3--N的生成量增加,但氧化产物主要是以N2为主的含氮气体。The effect of chloride ion on the reaction rate, pathway and products of ammonia electrochemical oxidation were studied by self-made PbO2 powder porous electrode as anode and stainless steel as cathode. The results showed that the electrochemical oxidation rate of ammonia was improved significantly by chloride ion added. Ammonia was removed mainly by ·OH and HClO which was produced in the presence of chloride ions. The removal efficiency of ammonia increased with the increasing current density and increasing initial pH. The formation of NO3-N increased by chloride ion added, and the oxidation products were mainly N2-based nitrogen gas.

关 键 词：PbO2 粉末多孔电极 电化学氧化 氨氮 氯离子 

分 类 号：X703.1[环境科学与工程—环境工程]