催化臭氧化降解技术中的两个问题

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。

Two problems in process of catalytic ozonation technology

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),Fe²⁺/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.