Competitive Removal of Cu2+,Zn2+ and Ni2+ by Iron Oxide (Fe3O4) Nanomaterial
A competitive adsorption of Cu2+, Ni2+ and Zn2+ ions from a synthetic wastewater onto (Fe3O4) nanomaterial was studied. Experimental parameters included pH, initial metal concentrations, and temperature was studied to obtain equilibrium data for adsorption, onto nanosorbent. The results indicate that the uptake capacities were 11.5, 6.07 and 9.68 mg/g for Cu2+, Ni2+and Zn2+, respectively, onto nanosorbent. The best values of pH and contact time were 6 and 50 min., respectively. For these metals, the equilibrium isotherm for single component is of a favorable type and Freundlich model gave the best model for representing the experimental data. The Combination of Langmuir- Freundlich model best represented the isotherms binary and ternary component systems. In single, binary and ternary component systems, Cu2+ was always adsorbed more favorable onto nanosorbent than Zn2+and Ni2+. The results of thermodynamic study showed that the adsorption process is endothermic and physical nature.