Application of industrial byproducts removal of dyes reactive textile

Abstract

The use of sawdust from Muracatiara (Astronium lecointei Ducke) and Angico branco (Anadenanthera colubrina) as low cost adsorbents for the removal of the dye Reactive Orange 16 (RO-16) in aqueous solution was the goal of this work. Variables such as pH (1-10), weight of adsorbent (0.1 and 0.2 g) and initial concentration of the dye (10-50 mg L-1) were studied, the highest values of q (mg g-1) at pH 1, a mass equal to 0.1 g and a concentration of 50 mg L-1. The kinetics of pseudo-second order was the best fit and the Freundlich model well described the adsorption process for both sawdust. FT-IR and Pi-GC/MS techniques were used to characterize groups and chemical structures responsible for the adsorption of the dye RO 16 in sawdust, allowing the filing of a mechanism of interaction between the adsorbate and adsorbent.