Fe^(3+)/N-TiO_2填料日光催化处理微污染源水  

Research on Micro-polluted Source Water Treatment by Solar Photocatalysis with Fe^(3+)/N-TiO_2

作　　者：刘佳玉[1] 张玉先[1] 杜尔登[1] 赵绪兰[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国给水排水》2009年第9期1-4,共4页China Water & Wastewater

基　　金：小城镇饮用水水质保障关键处理工艺及设备开发(2006BAJ08B02)

摘　　要：采用溶胶凝胶法制备了铁、氮共掺杂二氧化钛(Fe3+/N-TiO2)粉末,通过浸渍涂膜法将其负载到聚丙烯(PP)生物填料上,并考察了日光激发改性TiO2对微污染源水的处理效果。结果表明,铁、氮的掺杂大大提高了TiO2对太阳光的利用效率,当流量为0.12 m3/h时,负载型Fe3+/N-TiO2填料对CODMn和NH4+-N的去除率分别达到59%和75%。采用扫描电镜观察运行前后填料的表面状况,发现Fe3+/N-TiO2膜的保持程度较好,运行3个月后未发生明显脱落;膜表面生长了类似微生物的物质,可以推测在PP填料表面微生物与二氧化钛形成了功能分区,可以同时进行光化学氧化和生物降解作用。Fe^3＋/N-doped titanium dioxide （ Fe^3＋/N - TiO2 ） nanopowder was prepared by the solgel method and coated by the dipping method on polypropylene bio-filling materials. This modified immobilized titanium dioxide was tested in the treatment of micro-polluted source water by solar photocatalysis. The results show that the titanium dioxide doped by Fe^3＋/N efficiently utilizes sunlight. When the flow rate is 0. 12 m3/h, the degradation rates of CODMn and NH4^＋ - N achieve 59% and 75% respectively.The surface of the filling materials was analyzed by SEM before and after operation for 3 months. The external Fe^3＋/N- TiO2 film is not brushed off, and microorganisms are found on its surface. Thus, it is concluded that photochemical oxidation and biodegradation can be performed simultaneously on the surface of the polypropylene bio-filling materials.

关 键 词：太阳光 光催化 改性二氧化钛 微污染源水 

分 类 号：TU991.2[建筑科学—市政工程]