Study of Heavy Metal Ions Adsorption Using Grafted Polyurethane with Iron Oxide Nanoparticles as Adsorbent

Adsorption of lead ions Pb (II), Chromium ions Cr (III) and Cadmium ions Cd (II) using the polyurethane grafted on the iron oxide nanoparticles (PU-MNPs) has been investigated in the current study. The adsorbent was characterized using a variability of techniques counting Atomic Absorption Spectroscopy (AAS), Thermogravimetric Analysis & Differential Scanning Calorimetry (TGA& DSC). Different parameters were investigated to obtain the best results such as pH, contact time, the concentration of initial metals and temperature. In regards to the pH parameter, the highest adsorption rates were obtained at pH of 6, 7, and 5 for Pb (II), Cr (III) and Cd (II) respectively. In terms of the contact time, the minimum contact time was 60 min, 30 min and 45 min for Pb (II), Cr (III) and Cd (II) respectively. The initial concentration was 250 mg/g of each studied ion (Pb (II), Cr (III) and Cd (II)). The 300 agitation rpm speed at temperature 25 ± 2Cᵒ. were 70%, 76% and 73% for Lead, Chromium and Cadmium ions respectively. The results showed that the adsorption for the three investigated ions Pb (II), Cr (III) and Cd (II) followed the Lankemere and Freundlich equations., and the maximum adsorption of Cd (II)> Cr (III)> Pb (II).