Comparative study of removal of Cr(VI) with PAC, GAC and adsorbent prepared from tobacco roots.

Tobacco roots activated carbon (TRAC) has been prepared from tobacco roots impregnated with 20% of ZnCl2 and carbonized at 6000 degrees C. Its adsorption capacity has been tested for the treatment of wastewater containing hexavalent chromium. The experiments were carried out in a batch process to study the different system variables such as concentration, adsorbent dosage and contact time.