介质阻挡等离子放电臭氧氧化乙醛废水  

Plasma dielectric discharge ozonation of acetaldehyde in wastewater

作　　者：陆彬[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《环境工程学报》2015年第11期5381-5386,共6页Chinese Journal of Environmental Engineering

基　　金：国家"985"工程引进杰出人才基金项目(w20401)

摘　　要：对介质阻挡等离子体放电产生臭氧以及臭氧氧化乙醛模拟废水（乙醛水）的过程特性进行了研究。纯氧的介质阻挡等离子放电产生含有一定臭氧浓度的氧气流,含臭氧的氧气流通入模拟乙醛废水中对乙醛进行臭氧氧化。研究发现,乙醛可以被臭氧深度氧化成CO和CO2,CO2的选择性为66%～80%。乙醛去除反应是臭氧浓度的一级反应和乙醛浓度的一级反应。臭氧氧化乙醛的能量效率随能量密度的增加而降低。研究还表明,如能循环使用未能和废水中的乙醛发生反应的臭氧有望降低臭氧处理废水的成本。Oxidation of acetaldehyde in water was investigated using ozone produced by dielectric barrier discharge. Ozone was produced using dielectric barrier discharge plasmas in pure oxygen. Ozonation of acetaldehyde was carried out after transferring ozone into the water solutions containing acetaldehyde. It was found that acetaldehyde was oxidized into CO and CO2. The selectivity of CO2 was in range of 66% —80%. The ozonation reaction of acetaldehyde presented a first-order reaction of ozone concentration and a first-order reaction of acetaldehyde concentration. The energy efficiency decreased with increasing injected energy density. It was also suggested that the recycle of unreacted ozone into the solution containing acetaldehyde could contribute to reducing the operating cost for wastewater treatment using ozone.

关 键 词：乙醛氧化 臭氧 能量效率 

分 类 号：X703[环境科学与工程—环境工程]