Thermodynamic study of egg white albumin adsorption on charcoal derived from peach nuclei and walnut shell

Abstract EN

In this study, the efficiency of waste charcoal derived from walnut shell and peach Nuclei from synthetic wastewater (EWA) has been studied.

Batch adsorption experiments were carried out as a function of pH, adsorbent mass, EWA concentration, contact time and temperature. The pH of each solution was not controlled, this is because the net interaction between the adsorbent and EWA could be disturbed by the buffer solution, therefore, the experiments were carried out in a pH 2 to 4.

These experiments were done under room temperature and showed that the optimum weight of charcoal derived from Walnut shell was 0.2gm, equilibrium time was 60min., removal % (86.2) and Kd (86.2), While optimum weight of charcoal derived from peach Nuclei was 0.05gm, equilibrium time was 120min., removal % was ( 34.5) and Kd (138). Thermodynamic parameters such as ΔH, ΔG, ΔS, were calculated.

The adsorption process on charcoal derived from peach Nuclei was endothermic, while exothermic on charcoal derived from Walnut shell, the results were analyzed by the Langmiur and Freundlich equation.