微波辅助催化湿式氧化技术降解高浓度苯酚废水  

Microwave assisted catalytic wet oxidation of phenol solution

作　　者：金颜[1] 赵国华[1] 胡惠康[1] 

机构地区：[1]同济大学化学系,上海200092

出　　处：《环境污染与防治》2007年第12期925-929,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.50478106;No20577035);上海市纳米专项资助项目(No.0652nm030)

摘　　要：以纳米CuO为催化剂,采用微波辅助催化湿式过氧化氢氧化方法对高浓度苯酚废水(1000mg/L)进行降解处理,并与传统的催化湿式过氧化氢氧化技术进行比较,研究了微波强化作用对该技术的处理工艺条件、降解效率及机制的影响。结果表明,在微波的辅助作用下,当温度仅为60℃、压力为0.3MPa时,催化湿式氧化反应15.0min,苯酚废水的TOC去除率即达到90.8%。这表明微波促使催化湿式氧化反应可以在温和的条件下实现,而且效率高、速率快。进一步的降解机制研究发现,在微波的作用下,苯酚于2.0min内完全氧化转化,主要发生直接开环反应,生成短链羧酸,所经历氧化过程更为简单。Series of experimental runs of microwave assisted catalytic wet peroxide oxidation（MWCWPO）, using CuO nanoparticles as the catalyst, were performed on a phenol solution（ 1 000 mg/L）to determine the effects of micro wave irradiation on the reaction temperature/pressure, degradation rate/TOC removal relationships and the reaction mechanism. XRD and SEM were employed to characterize the catalyst,and HPLC was employed to identify the reaction products. The MWCWPO was far more effective than the traditional catalytic wet peroxide oxidation（CWPO） ;it was capable of achieving a greater TOC reduction in a shorter time at a lower temperature and/or lower pressure. The MWCWPO treatment,at 60 ℃ and 0.3 MPa,converted nearly all phenol to short-chain acids by direct open-ring reaction within 2.0 rain and achieved 90.8% TOC reduction in 15.0 min.

关 键 词：微波辅助催化湿式过氧化氢氧化 苯酚 纳米CUO 氧化温度 降解机制 

分 类 号：X703[环境科学与工程—环境工程]