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The residue of erva-mate (Ilex paraguariensis St. Hil) was used as a potential adsorbent to remove methylene blue in aqueous solutions. Three particle sizes and three agitation speeds were evaluated on the adsorption process. The kinetic equilibrium was reached about 350 minutes. The kinetic model of pseudo-second order was the one that best described the kinetic data of adsorption. The equilibrium data were better represented by Langmuir model with a qmax of 44.84 mg.g-1 for a temperature of 30°C. The residue of erva-mate proved to be an alternative adsorbent with potential to removal of this dye.

Utilização do resíduo de erva-mate como material adsorvente do corante azul de metileno