Abstract: Multi-walled carbon nanotubes (MWCNTs) and Fe3O4 nanoparticles-polyvinyl alcohol (Fe3O4-PVA) microspheres were composited to adsorb different kinds of water pollutants.MWCNTs/Fe3O4-PVA were developed via three steps:1.Fe3O4-PVA microspheres prepared by the inverse suspension cross-linked reaction were animated;2.MWCNTs were carboxylated;3.through the esterification reaction,MWCNTs and Fe3O4-PVA microspheres were composited.The morphology,composition and magnetism of MWCNTs/Fe3O4-PVA were characterized by FT-IR,XPS and VSM.The application of adsorption properties on copper ions and sulfadiazine in water were investigated.The results showed that MWCNTs/Fe3O4-PVA with saturation magnetization intensity of 16.18emu/g were prepared successfully.The adsorption balance time for copper ions and sulfadiazine was 4h and 2h (T=25℃,the dosage was 1g/L) respectivelly.For copper ions,the maximal adsorption rate was 96.5% (pH=10) and the adsorption capacity was 76mg/g(pH=10).While for sulfadiazine,the maximal adsorption rate was 65.9% (pH=4) and the adsorption capacity was 43mg/g (pH=4).
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