催化臭氧化降解技术中的两个问题  

Two problems in process of catalytic ozonation technology

作　　者：童少平[1] 臧兴杰[1] 马淳安[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,绿色化学合成技术国家重点实验室培育基地,杭州310032

出　　处：《环境工程学报》2008年第1期19-22,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50578146)

摘　　要：探讨了有机物特性及中间产物H2O2在催化臭氧化中的作用。结果表明,有机物在自由基链反应过程中的特性直接影响催化臭氧化的降解效率。当目标有机物是对链反应具有促进作用的甲酸时,自由基引发反应可以明显提高甲酸的臭氧化效率。当目标有机物是对自由基链反应具有抑制剂作用的乙酸时,O3和Fe2+/O3对乙酸有着相似的降解效率。以上结果表明,自由基引发反应并不是臭氧化降解效率提高的充分条件。另外,当臭氧化过程有H2O2产生时,必须考虑类Fenton反应对臭氧化效率的影响。The roles of characteristics of organic and intermediate H2O2 in the process of catalytic ozonation were discussed in this paper. The experimental results indicated that characteristics of organic in radical reaction directly affected degradation efficiency of catalytic ozonation. When the target organic was formic acid （a promoter of radical reaction in ozonation）, a radical initiation reaction could obviously enhance the ozoantion efficiency. However, when the target organic was acetic acid （an inhibitor of radical reaction） , Fe^2＋/O3 and O3 had similar degradation efficiencies. These results indicate that initiation reaction is not a plenary condition for enhancing degradation efficiency of ozonation. Also, when the intermediate product H2O2 was produced during ozonation, the effect of Fenton-like reaction on the degradation efficiency of ozonation must be considered.

关 键 词：臭氧 催化臭氧 硝基苯 乙酸 甲酸 降解 

分 类 号：X703[环境科学与工程—环境工程]