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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。
Four kinds of nano-iron oxides Fe3O4, α-FeOOH, α-Fe2O3 and γ-Fe2O3 were prepared. The morphology and particle size of the four kinds of nano-iron oxides were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD) , The crystal structure of the characterization; and four kinds of nano-iron oxide humic acid adsorption and flocculation removal experiments. The results show that all the four kinds of nano-sized iron oxides have diameters in the range of 0-100 nm, and their crystal forms and structures are in accordance with their respective properties, and their dispersibility is good without dispersant. The nano-iron oxide nano-α-FeOOH on humic acid adsorption and flocculation removal of the best, which is related with the nano-α-FeOOH hydroxyl radical containing unique groups.