Activated carbon was prepared from Passiflora foetida plant seed by chemical activation with KOH. The prepared activated carbon was characterized and utilized for the chromium (VI) removal from the aqueous solution. The effect of pH, contact time, initial concentration of adsorbate and temperature on the adsorption of Cr (VI) was investigated.TheCr (VI) adsorption followed the pseudo second order kinetics with good correlation coefficient. The Freundlich model best described theCr (VI) adsorption with high correlation coefficient. The thermodynamic parameters such as Free energy change (ΔG˚), Enthalpy change(ΔH˚) andEntropy change (ΔS˚) were evaluated. The negative value of ΔG˚ confirmed the feasibility and spontaneity of the process. Reversibility of Cr (VI) adsorption and reuse of the adsorbent, was investigated by desorption process.