Lalitha, PRenugadevi, N2017-02-172017-02-172010https://ir.avinuty.ac.in/handle/avu/1449In this study activated carbon from pods of woodappie, an agro waste has been used as at) adsorbent for removal of Cr(VI) from aqueous solutions. To analyze the efficiency of the activated carbon from woodappie (ACW) the experiments were also conducted with commercial activated carbon (ACC) and the results compared. The adsorption of Cr (VI) was carried out by varying the temperature and agitation time at two different pH . The negative value of free energy change (AG) and enthalpy (AH) show the spontaneous and exothermic nature of adsorption of Cr (VI) with respect to both the adsorbents used in this study .The positive value of entropy change (AS) indicate some structural changes in the adsorbate and the adsorbent and increased randomness during adsorption.