Thermodynamic study for adsorption of copper ions onto modified Hematite nanoparticles

Magnetic hematite (α-Fe2O3) nanoparticles prepared by sol-gel synthesis route using FeCl3, NaOH as reagents. Because of the strong interparticle forces that exist between hematite nanoparticles they tend to agglomerate. In order to reduce agglomeration amount hematite nanoparticles were loaded on the surface of polymeric carrier. Polystyrene was choiced as the polymeric carrier due to its tunable size and its easy synthesis. The modification process was carried out via chemical polymerazion in the presence of St (styrene) as the monomer, ammoniumPeroxodisulfate (APS) and Poly vinyl pyrrolidone (PVP) as the initiator and a stabilizer respectively. The prepared novel adsorbent was applied for efficient removal of copper ions from aqueous solution. Thermodynamic studies have done to take useful information about the feasibility and the spontaneous nature of the removal process with modified hematite nanparticles. The thermodynamic studies showed the spontaneity and exothermic nature of the removal process, with negative entropy witch shows the less randomness in the operating system

Keywords:

Hematite , α-Fe2O3 , Nanoparticles , Adsorption , Thermodynamic , Copper