Camellia oleifera seed shell carbon as an efficient renewable bio-adsorbent for the adsorption removal of hexavalent chromium and methylene blue from aqueous solution

We investigate herein the adsorption removal of Cr(VI) and MB by a porous activated carbon, which prepared by KOH activation of Camellia oleifera seed shell hydrochar. The adsorption capacity and regeneration performance results showed that the material has very high adsorption capacity for these contaminants removal, and has excellent reusability after regenerated using water or ethanol for Cr(VI) and MB, respectively.244