Abstract: In recent years，magnetic adsorbent material has unique advantages in industrial water treatment owe to its easy re-cyclicity.Magnetic ferriferrous oxide（Fe3O4），as adsorption material，was prepared by hydrothermal synthesis with ferrous sul- fate and urea as raw materials in water and glycerol mixed solvent system.As-prepared ferriferrous oxide was characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM），while its adsorption performance of for divalent lead ions （Pb2+） was also studied.The results showed that pure ferriferrous oxide was obtained，the amount of glycerol had a great effect on the morphology of ferriferrous oxide，and ferriferrous oxide had the best adsorption performance on Pb2+ when added 8 mL of glycerol.Fourier transform infrared spectroscopy（FT-IR spectrum） displayed that there was chemical interaction between ferriferrous oxide and Pb2+.Ferriferrous oxide is easy to recover and has an excellent adsorption performance for removal of heavy metal ions.Therefore，it has a good prospect in industrial water treatment.

Key words: magnetic ferriferrous oxide；preparation and characterization；heavy metal ions, adsorption