Lalitha, PRenugadevi, N2017-02-172017-02-172010https://ir.avinuty.ac.in/handle/avu/1448The present study is focused on removal o f hexavalent chromium from aqueous solution using an eco-friendly adsorbent, activated carbon prepared from the pods o f Delonix regia. The effect of optimum dosage, pH and initial concentration o f adsorbate on the effective removal of hexavalent chromium has been studied. The results o f the study show the adsorption o f Cr(VI) to be concentration and pH dependent. The maximum removal o f Cr(VI) was observed at pH 2. Removal o f Cr(VI) increased from 70.58% to -100% with increasing adsorbent dosage from 50 to 200 mg. The adsorption process was found to obey Langmuir adsorption isotherm and Freundlich adsorption isotherm. Hence the use of the low cost carbon prepared is o f practical importance and is expected to be economical.