MnO_x/介孔γ-Al_2O_3催化臭氧化降解水中安替比林的研究  

Catalytic ozonation of phenazone on MnO_x/mesoporous γ-Al_2O_3 in water

作　　者：杨力[1] 聂玉伦[1] 胡春[1] 马刚 李礼 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 [2]北京市自来水集团公司第九水厂,北京100192

出　　处：《环境工程学报》2011年第11期2542-2546,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20097714;50921064)

摘　　要：以自制的介孔γ-Al2O3为载体,通过等体积浸渍法合成了MnOx/介孔γ-Al2O3催化剂。采用X射线衍射(XRD)、透射电镜(TEM)以及紫外-可见漫反射(UV-Vis DRS)等手段对其进行表征。结果表明,锰氧化物在介孔氧化铝载体上具有较高的分散度,并且锰以多种价态存在。高度分散以及多价态的MnOx能够提高催化臭氧化过程中电荷转移,引起更高的催化活性。MnOx/介孔γ-Al2O3催化剂能够有效地提高臭氧对水中安替比林的矿化效果,对含量为10 mg/L的安替比林水溶液在反应60 min后基本达到完全矿化。MnOJmesoporous γ-A12O3 was prepared by impregnation method using synthetic mesoporous γ-A12O3 as the support. The obtained catalyst was characterized by X-ray diffraction （XRD） , transmission electron microscopy （TEM） and UV-Vis diffuse reflectance spectra （UV-Vis DRS）. The results reveal that MnOxis highly dispersed on mesoporous γ-A12O3 and exists as the muhivalenee oxidation states. The high dispersion and multivalence oxidation states of MnOx enhance the interfacial electron transfer in the ozonation process, resulting in the higher catalytic activity. The presence of MnOx/mesoporous γ-A12O3 catalyst significantly improves the mineralization efficiency of phenazone aqueous solution compared to non-catalytic ozonation. The total organic carbon （TOC） of the solution is almost completely removed at 60 rain at the phenazone concentration of 10 mg/L.

关 键 词：催化氧化 臭氧氧化 MnOx/介孔γ-Al2O3 安替比林 矿化 

分 类 号：X703.1[环境科学与工程—环境工程]