高盐度有机废水磁载催化剂降解工艺研究  

Catalytic Degradation of High Salinity Organic Wastewater Process Research

作　　者：赵俊生[1] 丁杰[1] 何锡阳[1] 

机构地区：[1]四川理工学院,四川自贡643000

出　　处：《化工生产与技术》2011年第2期45-47,58,共4页Chemical Production and Technology

基　　金：四川理工学院创新基金(y2009026)

摘　　要：以均匀沉淀法制备的Fe3O4磁粒为核心,以钛酸丁酯、正硅酸乙酯为原料,采用溶胶-凝胶法制备了磁载TiO2-SiO2-Fe3O4复合微粒,运用X射线衍射(XRD)、红外(IR)测试方法对所制得复合粒子进行表征,并以TiO2-SiO2-Fe3O4复合微粒为催化剂研究其高盐度有机废水催化降解的性能。结果表明,磁基体Fe3O4上包覆了一层SiO2和TiO2,制得磁载TiO2-SiO2-Fe3O4复合微粒。当有机废水pH=4.0,该催化剂的用量为3.0 g/L,空气体积流量为2 L/min,反应时间为1 h、温度为60℃时,COD的去除率为62.0%。In this paper,nano-sized Fe3O4 particles were prepared by the method of homogenous precipitation.By using the prepared Fe3O4 particles as nucleus,TiO2-SiO2-Fe3O4 composite particles were prepared by a sol-gel method with tetrabutyl titanate andtetraethl orthosilicate(TEOS)as starting materials.The composite particles were characterized by using XRD and FTIR.Catalytic degradation of high salinity organic wastewater were investigated using TiO2-SiO2-Fe3O4 as catalyst.The results showed that SiO2 and TiO2 wrapped on the surface of Fe3O4,and magnetic catalysts TiO2-SiO2-Fe3O4 had been prepared.When the solution pH was 4.0,theamount of TiO2-SiO2-Fe3O4 was 3.0 g/L,air flow rate was 2 L/min,reaction time was 1h,reaction temperature was 60 ℃,the removal ratio of COD was 62.0%.

关 键 词：高盐度 磁性Fe3O4 TiO2-SiO2-Fe3O4复合微粒 催化降解 

分 类 号：X703[环境科学与工程—环境工程]