Sorption and Desorption of Remazol Yellow by a Fe-Zeolitic Tuff

the adsorption of remazol yellow from aqueous solution was evaluated using a fe-zeolitic tuff. the adsorbent was characterized by scanning electron microscopy, ir spectroscopy and x-ray diffraction. sorption kinetic and isotherms were determined and the adsorption behavior was analyzed. kinetic pseudo-second order and langmuir-freundlich models were successfully applied to the experimental results, indicating chemisorption on a heterogeneous material. the regeneration of the material was best accomplished by using a h2o2 solution. the sorption capacity of the fe-zeolitic tuff increased when the saturated samples were treated with a h2o2 or fecl3 solution.