Abstract：The water resources in China are becoming more and more a critical issue. New technologies for water purification are urgently required. Magnetic seeds are the key materials for treating wastewater containing non-ferromagnetic pollutants with the methods of superconducting magnetic separation . In this work, Fe3O4 nanoparticles were prepared by the co-precipitation method. In order to obtain cellulose assembled or Polyvinyl acetate (PVA) coated magnetic seeds, the nanoparticles were modified by chemical implantation or plasma surface polymerization methods on the surface. Microstructure analyses by X-ray diffraction(XRD) and Transmission Electron Microscope(TEM) and IR (Infrared spectrum) indicate that the absorptive groups can combine well with the magnetic particles. With respect to the magnetic properties of modified magnetic seeds and its absorbing dynamics for aqueous ions and organics, it is shown that both magnetic seeds enjoy over 90% of absorption rate, which can meet the demand of superconducting magnetic wastewater separation.
2011, Vol. 29 
