| 摘 要： | Novel magnetic Fe_3O_4@C@MgAl-layerecl double-hydroxide(LDH) nanoparticles have been successfully prepared by the chemical self-assembly methods.The properties of surface functional groups,crystal structure,magnetism and surface morphology of magnetic nanoparticles were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),thermal gravity-differential thermal gravity(TG-DTG),scanning electron microscopy(SEM),and transmission electron microscopy(TEM).The adsorption studies of the novel adsorbent in removing heavy metals Cr(Ⅵ) from waste water showed that the maximum absorption amount of Cr(Ⅵ) was 152.0 mg/g at 40℃ and pH 6.0.The excellent adsorption capacity of the Fe_3O_4@C@MgAl-LDH nano-absorbents plus their easy separation,environmentally friendly composition and reusability makes them more suitable adsorbents for the removal of metal ions from waste water.
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