This work reports on the application of cereal ashes, from barley, oat, triticale, and wheat grains, as adsorbents for the removal of several organic pollutants: benzene, phenol, tetrachloroethylene, and toluene. The order of adsorption found for benzene and toluene on ashes was barley > oat > triticale > wheat, whereas for phenol and tetrachloroethylene, it was wheat > triticale > oat > barley. The Freundlich isotherm model has been applied to the equilibrium adsorption data.