Caracterização do bioadsorvente produzido a partir da torta de mamona (Ricinus communis L.)

Abstract

Contamination of a course is not always detectable. The adsorption is one of the most used technologies in the removal of contaminants of waters, has been gaining prominence. Without effluent treatment, adsorption with activated carbon (CA) is presented as an efficient and low cost method. The main advantage of the production of disposable waste is often inadequate. In this context, the study aims to obtain the consumption of agroindustrial residues (castor-bean) in the production of activated charcoal with adsorbent characteristics that can later be used in the application of an industrial effluent treatment. Coals have different types of activators, time and temperature, from castor bean cake. The yields were characterized by a chemical analysis, thermogravimetric (TGA), yield, zero load pH (pHcz), mesoporosity, Brunauer surface, Emmett and Teller (BET), scanning electron microscopy (SEM). After a characterization, adsorption tests of methylene blue were performed, aiming at adsorption capacity of the same, and the results applied in the Langmuir and Freundlich equations to verify the fit of the data as. The chemical characterization of the castor bean (TM) showed that the material presented a heterogeneous structural structure, with its components of cellulose, hemicellulose and lignin. The TGA analysis was stable during decomposition and increased at 400 °C, and pHcz of the coals with broad basal power ranges, and with the development of mesopores of good adsorptive capacity for CA at 800 °C. The adsorption of N2 showed CA with isotherms of type IV, images exhibited with appearances of analysis in the MEV. The best result was the adsorption test in CA 800°C with 60 minutes and 40% of phosphoric acid (H3PO4) and the mathematical model that best suited a Langmuir isotherm with a comedy of 0.99948, showing that the type of absorption was monolayers.