Fenton法氧化降解聚乙烯醇的机制  

Oxidation Degradation Mechanism of Polyvinyl Alcohol by Fenton Process

作　　者：华兆哲[1] 曹扬[1] 陈坚[1] 

机构地区：[1]江南大学生物工程学院环境生物技术实验室

出　　处：《化工环保》2006年第1期1-4,共4页Environmental Protection of Chemical Industry

基　　金：教育部留学回国人员科研启动基金项目[教外司留(2005-55)]。

摘　　要：为深入了解Fenton法氧化降解聚乙烯醇(PVA)的机制,通过考察反应过程中COD、BOD5、总有机碳及pH等随反应时间的变化,研究了聚乙烯醇Fenton氧化降解过程的特点,结果表明,当PVA被Fenton试剂氧化时,可生成大量CO2,同时生成酸性中间产物。进一步分析认为,当Fenton试剂中H2O2不足量时PVA氧化的中间产物以醛为主,而当HO足量时醛会被继续氧化生成有机酸,最终COD去除率达到80%。In order to comprehend the oxidation degradation mechanism of polyvinyl alcohol （ PVA ） by Fenton process, characteristics of the process were studied by investigating the varying of parameters （ such as COD, BOD5, TOC, pH, and so on ） with the reaction time. The results show that a large amount of CO2 and some acidic intermediate products are generated in the oxidation of PVA by Fenton reagent. Further analysis indicates that when H2O2 in Fenton reagent is deficient,the main intermediate product of PVA oxidation is aldehyde, whereas when H2O2 is enough, aldehyde will be further oxidized to organic acid. At the end,the removal rate of COD can reach 80%.

关 键 词：芬顿试剂 聚乙烯醇 氧化 降解 机制 

分 类 号：X791[环境科学与工程—环境工程]