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化工学报  2014 

非均相类Fenton法降解硝基苯化工废水的效能及其机制

DOI: 10.3969/j.issn.0438-1157.2014.04.045, PP. 1488-1494

Keywords: 类Fenton,沸石,废水,过氧化氢,降解

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Abstract:

以实验室制备的3A-Fe型分子筛为催化剂,并利用扫描电镜、能谱分析和XRD技术对催化剂进行了表征。在3A-Fe型分子筛与H2O2构建的非均相类Fenton催化体系内对硝基苯的降解效能和机制进行了研究,讨论了体系pH值、H2O2的投加量、催化剂投加量、硝基苯废水浓度对硝基苯降解率和反应速率的影响,并初步揭示了硝基苯的降解机理。结果表明:3A-Fe分子筛作为催化剂的类Fenton反应,在pH值2~10之间都具有较好的处理效果;类Fenton体系氧化降解反应过程是一种非均相的界面微观反应;3A-Fe类Fenton催化剂性能优越,对硝基苯废水中硝基苯的去除率为94.1%,CODCr和TOC的去除率分别为78.6%和60.5%。

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