Adsorption Capacity of Some Metal Ions Using Polyurethane Modified Magnetic Nanoparticles as Adsorbent

The current research was designed to study the adsorption of Cobalt Co (II) and Nickel Ni (II) on the surface of modified polyurethane-magnetic nanoparticles (PU-MNPs) as adsorbent. The adsorbent was characterized using a variety of techniques including Fourier Transform Infrared Spectroscopy (FTIR), Atomic Absorption Spectroscopy (AAS), Field Emission Scanning Electron Microscope (FESEM), Dispersive X-Ray Detection (EDX and) Transmission Electron Microscopy (TEM). Different parameters were studied to obtain the best results such as pH, contact time, the concentration of initial metals and temperature. The highest results were obtained at a pH of 5 for Cobalt ions, and at a pH of 7 for   Nickel ions. The minimum contact time was 120 min for Cobalt ions and 60 min for Nickel ions. The initial concentration was 150 mg/g for Co ions and 250 mg/g for Ni ions, and 300 agitation rpm speed at temperature 25±2 °C, which was 82% and 94% for Cobalt and Nickel ions respectively. The results showed that the adsorption follows the Lankmayr and Freundlich equations. It was noticed that the Cobalt Co (II) and Nickel Ni (II) ions both followed the Langmuir isotherms. The maximum adsorption of Co (II) was higher than that of Ni (II).