Remoção de íons Cr 6+ e Fe 3+ utilizando resina de troca iônica

Abstract

The concern with the growing consumption of fuel, coupled with the scarcity of raw materials and environmental pollution encourage the use of biotechnology in the production of The heavy metal pollution has become a serious environmental problem. Tailings containing a heavy metal ion such as chromium and iron can cause damage to the environment and human health. Thus, the purpose of this study was to evaluate the adsorption capacity of Cr 6+ and Fe3+ employing up, as adsorbent, resin Purolite Anion 400, Purolite resin Mixed MB 478 and Purolite resin Cation C100. The conditions used were the concentration of chromium ions and iron 10 to 150 mg / L, 25 ° C temperature, 35 ° C and 45 ° C, resin mass 0.1g, 03 g and 0.5 g. The process was carried out in batch reactors, jacketed and endowed with magnetic stirring. The chromium ion adsorption process proved to be efficient using Anion Resin Purolite A 400 Purolite and Resin Mixed 478 MB in temperature 25 ° C show that by increasing the process temperature to a reduction in removal of chrome ion. For iron ion adsorption process proved to be efficient using Cationic resin Purolite C100 and Mixed Resin Purolite 478 MB temperature at 25 ° C show that by increasing the process temperature to a reduction in removal of iron ion. The adsorption process for chromium ions and iron is exothermic and spontaneous according enthalpy (ΔHº) and Gibbs energy (ΔGº) calculated. It was found that the Henry adsorption isotherm showed the best fit for the data balance of iron and chromium.