Highly porous activated carbons were fabricated from sunflower seed hull by ZnCl2 activation and used as adsorbents to remove Cr(VI) ions from aqueous solution. The adsorption experiments the optimum pH for Cr(VI) adsorption varied at pH 2.5.
The adsorption amount of SSH activated carbons was calculated following the Langmuir isotherm model can be well adsorption by kind of activated carbon, S-650.