1 research outputs found
Performance of eggshells powder as an adsorbent for adsorption of hexavalent chromium and cadmium from wastewater
This study explores the kinetic and equilibrium performance of eggshell as an adsorbent for hexavalent chromium and
cadmium ion removal from wastewater. The experimental removal of the two metal ions was performed batch-wise and
the influence of variables like initial metal loading, pH, contact time, and adsorbent dose. Fourier-transform infrared spectroscopy
spectra reveals that chromium and cadmium ion interact with carbonyl, carboxylic, hydroxyl functional groups
in eggshell. The best pH is 6, and the adsorption capacity improves with increasing initial concentration of adsorbate, pH,
contact time and adsorbent dosage for chromium and cadmium ion. Pseudo-second-order kinetics is the most suitable
model for the removal of chromium and cadmium ion, while the equilibrium agrees with Freundlich isotherms. These
outcomes reveal that eggshell is a promising cheap adsorbent for adsorption of toxic heavy metals like chromium and
cadmium ion from aqueous solution