Kinetic and Adsorption Isotherm of Ammonia Using Egg Shell Powder

Abstract

Adsorption study of ammonia using normal and non-protein eggshell powder showed that when the initial concentration and adsorbent dosage increased, the adsorption increased. The removal attained the equilibrium was at 30 minutes. Dissolution of eggshell made the pH of the solution increased. The percentage of removal using normal and non-protein eggshell were 91.53 ± 2.42 and 76.17 ± 1.43, respectively. Normal eggshell adsorbed ammonia was better than non-protein eggshell significantly (p < 0.05). That was because of the lower dissolution of normal eggshell. The kinetic sorption data followed the pseudo-first order reaction. The rate constants were found to be 0.00852 and 0.00461 min^-1 for normal and non-protein eggshell, respectively. The data was fitted to the Langmuir adsorption isotherm, which was the monolayer sorption occurred. Adsorption capacity for normal and non-protein eggshell were 51.813 and 46.512 mg/g, respectively. From the study, it could be concluded that it was possible to develop the adsorbing materials from eggshell for wastewater treatment and also decreasing the waste materials.