Green iron-based nanoparticles for Cr(VI) removal

PARONETTO, G.S.; ARENCIBIA, NICOLÁS; OLIVELLI, M.; MONTES, L.; FERNÁNDEZ, M.; CRANE, R.; CANDAL, R.; LITTER, M.; MARCO BROWN, J.L.

Buenos Aires

Congreso; 11th World Congress of Chemical Engineering; 2023

Asociación Argentina de Ingenieros Químicos

The use of iron-based nanoparticles (nFeNPs) for the removal of pollutants from water has gained attention due to their great capacity to degrade and/or immobilize the contaminants. An alternative low-cost, green method of synthesis of nFeNPs is the reduction of Fe(III) with leaf extracts or by iron-reducing microorganisms. The use of clays such as montmorillonite (MMT) as support can be beneficial due to its potential ability to remove the contaminant via adsorption processes. In this work, iron based-nanoparticles supported on MMT composites were synthesized using yerba mate (YM) extract (g-NPsYM), and by a novel methodology based on the use of iron-reducing microorganisms (g-NPsBio). Composites were characterized by SEM, EDS, TEM, XRD and Mössbauer spectroscopy, and tested in Cr(VI) removal processes. The green and low-cost synthesized composites have an excellent performance for Cr(VI) removal, being potentially suitable for the remediation of water.