The present study deals with the elimination of phenol by adsorption onto polyaniline coated silica gel, from synthesized aqueous solutions. The silica gel was coated by the polyaniline, a conducting and an electroactive polymer in order to modify its surface structure to improve its adsorption capacity. The study was carried out batchwise and the effect of important operating parameters like the contacting time, the initial concentration, the temperature and the pH was also investigated. The obtained results showed that the polyaniline coating of the silica gel surface did in fact improve the adsorption capacity of phenol.