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Characteristics and efficiency of eggshell powder (ESP) were investigated as a low-cost adsorbent in removal of different heavy metal ions from aqueous solution. Initial findings showed ES potential to be applied as an effective sorbent due to high concentrations of carbon and calcium and high porosity and availability of functional groups. Adsorption experiments were studied with varying pH, contact time, and ESP concentration. Maximum percentages of heavy metal ions removal were recorded at optimum pH, contact time and adsorbent concentration. Evaluation of the isotherms and kinetics confirmed that ESP has high value of adsorption capacity. This experiment demonstrated the ability of ESP as an effective, sustainable, and low-cost adsorbent for removal of the heavy metal ions in different wastewaters.

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