Estudo cinético e do equilíbrio da casca da banana ativada com ácido na remoção de chumbo e cobre em meio aquoso.

Abstract

Treatment techniques of wastewater containing metal ions that combine low cost, efficiency and environmental preservation are extremely desired. In this context the use of tailings in the treatment of these effluents has been well-studied and the adsorption process using biosorbent has excelled, the present study sought to investigate the potential of banana peel flour modified with hydrochloric acid as alternative material removal of Cu2 + and Pb2 + in aqueous effluent. The biosorbent was characterized by techniques SEM, FTIR and DRX. Using the batch method has been investigated involving the contact time, the pH of the solution, the mass of the adsorbent, solution concentration and temperature in the adsorption process. The SEM showed that the surface of the FBM presented irregularities, cavities and a large number of pores, the FTIR revealed the presence of hydroxyl and carbonyl groups present in the form of lignin, cellulose and hemicellulose. The DRX proved that the material is not amorphous beyond confirming the existence of such groups. The saturation occurred in 10 minutes, the pH of the solution was great 5.0, the mass of the adsorbent was 1 g, the concentration of the solution is not influenced significantly in percentage removal as well as the temperature. The Langmuir model was the best adjusted to the process. The adsorption occurred spontaneously and favorable. The kinetics of pseudo second order was the best adapted to the experimental data. Concluding that the FBM offers the potential to be used as alternative adsorbent.