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以高锰酸钾为锰源、过硫酸铵为还原助剂,采用化学沉淀法在硅藻土藻盘上制备氧化锰纳米线。采用SEM、TEM、HRTEM、XRD、BET、FT-IR等对样品进行了表征,研究了样品对Cr(Ⅵ)吸附规律。氧化锰纳米线直径5~10 nm、长300~500 nm、呈多晶形态,比表面积为144 m2/g。样品对Cr(Ⅵ)的最大吸附容量为47 mg/g,对初始质量浓度为10 mg/L的含Cr(Ⅵ)污水去除率达99.6%。样品对Cr(Ⅵ)吸附等温模型更符合Langmuir等温式。
Using potassium permanganate as a manganese source and ammonium persulfate as a reducing aid, a manganese oxide nanowire was prepared on a diatomaceous earth plate by a chemical precipitation method. The samples were characterized by SEM, TEM, HRTEM, XRD, BET and FT-IR. The adsorption of Cr (Ⅵ) on the samples was studied. Manganese oxide nanowires diameter of 5 ~ 10 nm, length 300 ~ 500 nm, polycrystalline morphology, the specific surface area of 144 m2 / g. The maximum adsorption capacity of Cr (Ⅵ) for the sample was 47 mg / g, and the removal rate of Cr (Ⅵ) with the initial concentration of 10 mg / L was 99.6%. The Cr (Ⅵ) adsorption isotherm model is more consistent with Langmuir isotherm.