Estudo de adsorção a partir de biocarvão obtido da fibra de barbatimão - Stryphnodendron adstringens (Mart) Coville

Abstract

Currently, environmental problems caused by the growing demand of industry have aroused social and economic concern by boosting the development of new technologies capable of minimizing the impact caused. In Brazil, various environmental problems stem from the accelerated growth of industrial production sectors and the use of their waste has demonstrated efficiency in the production of low cost adsorbers for the removal of their effluents. thus, it becomes interesting to use the fiber of barbatiman, residue from the pharmaceutical industry as well as leather and paints, since its disposal cost can be minimized from its reuse. Therefore, this work aims at the production of biocoal from the barbatiman fiber by pyrolysis, in addition to its use for the adsorption study of methylene blue applied to three commonly used mathematical models, the model of Thomas, of Yoon-Nelson and the Yan model. In the pyrolytic process, 286,5g of pre-dried and shredded barbatiman fibers were used, having as parameters heating rate of 10°C. min-1, 120min residence time and thermostatically bath at 3°C, under 250mmHg vacuum. The conditions used for the adsorption study were carried out in a column test with a fixed volumetric food flow bed of 9mL.min-1, 9cm bed height and 7,2g mass of biocoal, with diameter <0,42mm. The results obtained show that the mathematical models used are appropriate as the data adjusts satisfactorily to the models, having a better correlation factor with the Yan model.