The magnetite nanoparticles were prepared using a coprecipate method and the surface was modified by the imine groups. First, the amine groups were bounded to surface of magnetic nanoparticles with Aminopropyl TriEthoxysilane. Then two-aldehyde, pyrrole-2-carboxyaldehyde and bromobenzaldehyde were used to create the imine group on the surface. The synthesized adsorbents were investigated in lead ion removal. Absorption efficiency was concidered with emphasis on various parameters such as pH, contact time, temperature, concentration of ionic solutions and amount of adsorbent. In order to better understand the absorption process, absorption kinetics and equilibrium isotherms were investigated. It was also found that the kinetic equations for lead follow the second-order kinetic equation for both absorbent. In second project palladium was loaded onto synthesized adsorbents. In fact, a complex of palladium was placed on a magnetic surface. The resulting nanoparticles were identified by the following FT-IR, X-ray diffraction, scanning electron microscopy and thermal decomposition analysis. The resulting catalysts were investigated in the reaction of reducing paranitrophenol. The progress of the catalytic reaction was followed by the use of UV-visible spectroscopy. The catalyst was used up to 4 times without significant reduction in catalytic activity.