纳米氧化铁絮凝剂的制备及应用研究  

PREPARATION OF NANO-SIZED IRON OXIDE FLOCCULANT AND THE APPLIED RESEARCH

作　　者：王国田[1,2] 李久义[1] 田秉晖[2] 刘徽[2] 刘俊伟[2] 

机构地区：[1]北京交通大学市政与环境工程系,北京100044 [2]中国科学院生态环境研究中心,北京100085

出　　处：《环境工程》2009年第S1期606-610,共5页Environmental Engineering

基　　金：国家高技术研究发展计划("863"计划)项目(2008AA06Z301);国家科技重大专项水体污染控制与治理(2008ZX07314-001-09)

摘　　要：制备4种形态纳米氧化铁Fe3O4、α-FeOOH、α-Fe2O3、γ-Fe2O3,应用透射电子显微镜(TEM)和x?射线衍射仪(XRD)对4种纳米氧化铁进行了形貌,粒径,晶型结构的表征;并对4种纳米氧化铁进行了腐殖酸吸附和絮凝去除实验研究。结果表明:制得的4种纳米氧化铁粒径均在0～100nm,其晶型和结构都符合各自的性质,且在无分散剂的条件下分散性良好。4种纳米氧化铁中纳米α-FeOOH对腐殖酸的吸附和絮凝去除效果最好,这与纳米α-FeOOH含有的特有基团羟基自由基有关。It was prepared that four sorts of nano-sized iron oxides:Fe_3O_4,α-FeOOH,α-Fe_2O_3 and γ-Fe_2O_3,whose characterization of nano-morphology,particle size and crystal is expressed by TEM and XRD;and their ability of adsorption and flocculation of humic acid was studied.The results show that the four types of iron oxides' nano-particle size is between the 0-100 nm,and their crystal form and structure are consistent with the nature of their own,and in the absence of dispersing agent under the conditions of good dispersion.Nano α-FeOOH has the best ability of adsorption and flocculation of humic acid,which is related to its unique group of the hydroxyl radical.

关 键 词：纳米氧化铁 吸附 絮凝 腐殖酸 

分 类 号：TB383.1[一般工业技术—材料科学与工程]