Evaluation of potentially toxic metal biosorption kinetics Mn (II) in acai pit residues (Euterpe Oleracea Mart.)

Abstract

Contamination of ecosystems with industrial and population advances has caused numerous problems to the environment and human health, as inappropriate disposal of effluents contaminated by potentially toxic metals impairs soil and groundwater. A low-cost and efficient alternative for the removal of these metals is biosorption which can be performed through biosorbents such as the açai pit residue (Euterpe Oleracea Mart.). This work evaluates the reuse of acai pit waste in fresh form and as chemically activated charcoal with HCl in Mn (II) ions biosorption. The reuse of acai residue as Mn (II) ions biosorbent has shown good biosorption capabilities, and modified biomass performed better performance in a shorter contact time than fresh (186.72 mg kg-1 in 10 hours). The kinetic study according to PFO, PSO, ELOVICH, and intraparticle biomass diffusion models in fresh and chemically modified form has shown for both better adjustment to the pseudo-second-order model, indicating that the Mn (II) ion biosorption process occurs via chemiosorption.