Synthesis Of Magnetic Fe3o4-Supported Schiff Base Materials And Adsorption Properties Of Cu(Ii), Pb(Ii) And Cd(Ii)

The magnetic Fe3O4-supported Schiff base adsorption material was synthesized via the reaction with activated silica gel silane and salicylaldehyde or its derivatives by homogeneous method and heterogeneous method, respectively. The prepared materials were fully characterized by infrared spectroscopy (FTIR), X - ray diffraction (XRD), scanning electron microscopy (SEM) and so on. The adsorption performance of these materials on Cu(ll), Pb(II) and Cd(ll) in water was studied at 30 degrees C. The effects of synthesis method, pH value, ion concentration and material structures on the adsorption properties were examined. Finally, the regeneration property of the adsorbent was evaluated. The results showed that the obtained materials exhibited good adsorption performance for Cu(ll), Pb(ll) an d Cd(ll) ions, and the adsorption capacity increased with the increase of pH value in the range of 1 similar to 6. The adsorption capacity of the adsorbents obtained by heterogeneous method was better than those of homogeneous method. In addition, the materials bearing electron-donating groups on the Schiff base showed better adsorption properties. This type of adsorbent exhibited good regeneration property with 89.4% regeneration rate after 4 cycles.