Fenton试剂催化氧化降解含硝基苯废水的特性  

Characteristics of Nitrobenzene Containing Wastewater Catalytic Oxidation Degradation by Fenton Reagent

作　　者：韦朝海[1] 陈传好[1] 王刚[1] 任源[1] 吴超飞[1] 吴海珍[2] 

机构地区：[1]华南理工大学化工学院,广州510640 [2]华南理工大学食品与生物工程学院,广州510640

出　　处：《环境科学》2001年第5期60-64,共5页Environmental Science

基　　金：国家自然科学基金 (2 98770 0 9);国家教育部跨世纪优秀人才培养计划基金;广东省与广州市环保局科技基金项目

摘　　要：探讨不同氧化剂和催化剂浓度下Fenton试剂氧化降解硝基苯的作用规律 ,用一元线性回归方程对不同氧化降解时间后硝基苯的相对残余浓度对反应时间的相关性进行了定量分析 ,结果发现硝基苯的Fenton试剂氧化降解符合一级反应动力学模式 ,通过回归求出了各反应条件下的一级速率常数 .实验中还发现以Fenton反应过程中产生的铁离子的复合物代替Fe2 +作为催化剂时Fenton反应不仅取得了较高的催化反应速率和降解效率 ,而且对硝基苯具有明显的专属性 ,硝基苯的降解速率可由原来的 1 7 4 8mg/(L·min)提高到 71 2 2mg/(L·min) ,反应 5min的硝基苯去除率由 9 74 %提高到 91 79% .用人造沸石为载体吸附该物质制成的非均相催化剂同样具有良好的催化性能 .另外 ,在体系中引入紫外光可以促进废水中CODCr的进一步降解 。Through the alteration of the concentration of catalyst and oxidant, the rulers and dynamics of nitrobenzene oxidized by Fenton reagent in different concentrations were studied. The correlativity of the reaction time and relatively remain nitrobenzene was analyzed by the unitary linear regress equation. The result of the analysis proves that the coefficient was over the critical constant. The oxidation of nitrobenzene by Fenton reagent was in conformity with first-order dynamics model and the reaction rate constant was got at the same time. The idea, using the complex of Fe as the catalyst replacing Fe 2+ in the Fenton Reaction, not only got a higher reaction velocity and efficiency, but also had a distinct exclusive to the degradation of nitrobenzene. The remove velocity of nitrobenzene was improved from 17 48mg/(L·min) to 71 22mg/(L·min), the remove rate in 5 minutes was from 9 74% to 91 79%. The nonhomogeneous catalyst made by the artificial zeolite with Fe\|complex adsorbed had the same catalyzing behavior. In addition, ultraviolet radiation can also improves the Fenton reaction to some degree. These research works could demonstrate the good application potentiality of Fenton reagent in treating wastewater.

关 键 词：FENTON试剂 硝基苯废水 催化氧化 动力学 UV催化 废水处理 降解 特性 

分 类 号：X783[环境科学与工程—环境工程]