EGG SHELL AS NATURAL SORBENT TO REMOVE CADMIUM IONS FROM SIMULATED WASTEWATER

This search offers the ability of use a natural waste as a biosorbent such as egg shells and their efficiency on heavy metals adsorption, like cadmium. Maximum removal was observed at pH 6.0. The efficiency of egg shells for the removal of cadmium was 89.7% at 5g adsorbent dose. Effect of temperature change has been calculated; and parameters of thermodynamic indicated that the sorption of cadmium is favored at high temperatures and endothermic. FTIR was recorded before and after adsorption to show the number and position of the functional groups available for cadmium binding on to the studied adsorbent. It was found that Freundlich isotherm fitted well to the data; Pseudo-second order model explains the cadmium kinetics more effectively. The results appeared that cadmium is considerably adsorbed on egg shells and it could be and economic method for the removal of cadmium from aqueous solutions.

Abstract licence: CC BY

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