Estudo da viabilidade da casca de manga (Mangifera indica) in natura como bioadsorvente em adsorção de metais potencialmente tóxicos em meio aquoso

Abstract

The generation of solid waste and its improper disposal has several consequences for the aquatic environment, including contamination with potentially toxic metals. The treatment of effluents requires alternative means with lower costs. Due to this need, the use of biomass to produce biosorbents is a viable alternative. Thus, this work evaluated the efficiency of mango peel biomass (Mangifera Indica) in natura as a bioadsorbent for removing potentially toxic metals in an aqueous medium. The mango peels used for the production of the bioadsorbent in this work were transferred to the street market in the Cidade Nova neighborhood, located in the city of Feira de Santana, Bahia. The raw material was washed to remove dirt and sugar, dried, and then characterized by XRD, FTIR, MEV and TG. Tests were carried out to evaluate the best conditions for the adsorption of metallic ions of Fe, Pb, Mn, Zn, Cd, Ni, Cr, Cu in a mixed aqueous solution of 1 mg L-1, using a complete factorial design 23 with quadruplicate of the central point.Line A8 of this planning indicates a greater number of metals that presented significant data evaluating the optimal adsorption condition. Pb presented the lowest percentage of maximum removal (49.04%) and Cu presented the highest percentage (89.95%).