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Corn cobs were evaluated as raw material in the production of an adsorbent for phenol removal from aqueous solutions. Adsorption kinetics and equilibrium were satisfactorily described by the pseudo second-order and Freundlich models, respectively. Fixed bed adsorption (breakthrough curve) was satisfactorily described by Bohart-Adams, Yoon-Nelson and Dose-Response models. Adsorption tests showed that the prepared adsorbent presented higher adsorption capacity than activated carbons produced from other agricultural residues, confirming that this type of waste material is a suitable candidate for use in the production of adsorbents.

Batch and Column Studies of Phenol Adsorption by an Activated Carbon Based on Acid Treatment of Corn Cobs