Abstract
In this study, egg-albumen-formaldehyde based magnetic polymeric resin (MPR) was synthesized and used for the removal of Cd(II) ion from aqueous solution. Different variables affecting the adsorption of Cd(II) ion such as sorption time, pH of the solution, initial concentration of Cd(II) ion and temperature were also examined. The percentage removal of Cd(II) ion was increased with increasing contact time and temperature. The highest removal of Cd(II) ion was observed at pH 7 and the equilibrium was achieved within 4 h. Thermodynamic factors such as ΔG°, ΔH° and ΔS° were also evaluated from graphical interpretation of the experimental results. Thermodynamic and kinetic analyses showed that the adsorption process was spontaneous and endothermic, which fitted well with the pseudo-first-order kinetic model and Langmuir isotherm model. The maximum adsorption capacity which was obtained using Langmuir equation was found to be 149.3 mg g−1 at 298 K which was increased with increasing temperature. Regeneration studies were also performed using 0.1 M HCl solution to examine the reusability characteristics of MPR. Consequently, it was concluded that the MPR could be successfully used for the removal of the Cd(II) ion from aqueous medium.
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