Effect of pH and Adsorbent dosage on the removal of Hexavalent chromium from its aqueous solution by activated carbon of pachygone ovata

Abstract

The activated carbon was prepared from the plant leaf pachygone ovata which was freely available. In order to increase the adsorption capacity, adsorbent was chemically modified by using sulphuric acid at moderate temperature. It was well proven that modification with mineral acids at moderate temperature could increase the porosity of the adsorbent. In this study chemically modified activated carbon was employed to evaluate their performance on the removal of Cr (VI) from their aqueous solution. The parameters influencing adsorptive capacity of adsorbent such as pH of the solution and adsorbent dose were analyzed. The optimum pH and adsorbent dose were identified.