Evaluación de la capacidad de residuos florícolas (Tallos de rosa) como bioadsorbente de cromo presente en los efluentes de la industria curtiembre.

Abstract

This research assessed the capacity of flower residues (rose stems) as chromium bio-adsorbent of the tanning effluent. In the first place, a physicochemical characterization of this bio-adsorbent was carried out, to then perform different studies of relevant parameters, such as biomass dose, pH, contact time. Based on this it was determined that the virgin bio-adsorbent does not have a high absorption efficiency, which is why it was chemically modified, with solutions of sulfuric acid, sodium hydroxide separately, obtaining a higher percentage of absorption with the modified bio-adsorbent with sulfuric acid. With this adsorbent in synthetic solutions of basic chromium sulfate are established, that the optimal conditions of the absorption process are: 30 grams, pH 6 and 20 hours. The study of the kinetics of bio-adsorption was carried out, reaching the equilibrium with the 69% removal, the kinetic model that best fits the experimental data is the Second Order Pseudo and as for the equilibrium study, it is represented by the Sips isotherm, the same that establishes a maximum capacity and absorption of 5.1 mg Cr / g bio-adsorbent. Finally, the bio-adsorbent was tested in a sample of the effluent of the Promepell tannery S.A. under the conditions indicated above, obtaining 57.01% removal.