Natural absorbents application in heavy metals removal

The objective of this study is analyzing the use of natural absorbents as an economical adsorbent for the removal of heavy metals from effluents. The experiments were conducted in batch system and the effect of pH, the amount of adsorbent, contact time and the initial concentration of heavy metals were examined. The most common isotherms and kinetics of adsorption were applied to analyze heavy metals adsorption and the reaction rate; also the morphological characteristics of natural absorbents were determined before and after the process by using scanning electron microscope (SEM).