Fe2O3-TiO2-MnO2/Al2O3催化臭氧化催化剂的制备及表征  

Preparation and characterization of Fe_2O_3-TiO_2-MnO_2/Al_2O_3 catalysts

作　　者：张耀辉[1] 涂勇[1] 唐敏[1] 徐军[1] 刘伟京[2] 武倩[1] 陈勇[1] 李军[1] 

机构地区：[1]江苏省环境科学研究院,江苏省环境工程重点实验室,江苏南京210036 [2]江苏省环境工程咨询中心,江苏南京210036

出　　处：《中国环境科学》2016年第10期3003-3009,共7页China Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07101-003);江苏省环境工程重点实验室自选课题(ZX2015005)

摘　　要：以Al_2O_3为载体,采用浸渍-焙烧法制备了Fe_2O_3-TiO_2-MnO_2/Al_2O_3催化剂,使用SEM、EDX、BET和XRD方法对其进行了表征.以化工园区污水处理厂二级出水为目标降解物,考察了该催化剂在臭氧催化氧化过程中的催化活性.结果表明,浸渍液中Ti^(4+)、Mn^(2+)、Fe^(3+)的摩尔比为2:2:1、焙烧时间为4h和焙烧温度为500℃下制备出的催化剂对化工园区废水有较好的催化性能,在臭氧投加量为50mg/L,催化剂填充率为50%的条件下,反应60min后废水COD的去除率达到52.2%.三维荧光谱图显示,废水经臭氧催化氧化后,水中可见腐殖质类和UV腐殖质类物质可完全降解,同时有少量类富里酸生成.The Fe_2O_3-TiO_2-MnO_2/Al_2O_3 oxide catalyst was prepared by the dipping-calcination method using A12O3 as a carrier. SEM, EDX, BET and XRD techniques were performed to characterize the catalyst. The catalytic activity of the prepared catalyst was investigated by catalytic ozonation of the effluent in sewage plant of chemical industry park at room temperature and atmospheric pressure. The results showed that the optimal preparation parameters were as follow： the molar ratio of Ti-（4＋）, Mn-（2＋） and Fe-（3＋） in the dipping solution was 2：2：1, calcination time and temperature 4h and 500℃respectively. Furthermore, the degradation performance obtained for COD in wastewater showed that the catalytic activity of Fe_2O_3-TiO_2-MnO_2/Al_2O_3 catalyst was good when amount of ozone was 50mg·L-（-1） and filling ratio of catalyst was 50%, it could be removed 52.2% of COD after 60 min oxidation. Three-dimensional fluorescence spectra showed that visible humus and UV humus in the wastewater were completely degraded after catalytic ozonation, and a small amount of fulvic was generated.

关 键 词：凝胶 浸渍 催化剂 臭氧催化氧化 化工废水 

分 类 号：X703[环境科学与工程—环境工程]