PREPARATION OF IRON/CARBON MATERIAL FROM BIODIESEL WASTE FOR APPLICATION IN THE REMOVAL OF ORGANIC CONTAMINANTS

In this work, iron/carbon-based catalysts obtained from biodiesel residues, glycerin, were prepared. The composites were prepared by thermal carbonization of the glycerin polymer, from biodiesel residues, in the presence of iron salt. The materials obtained were characterized by adsorption/desorption of N-2, scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and thermogravimetric analysis. XRD analysis have shown the presence of hematite and magnetite. The methylene blue (MB) adsorption and oxidation tests reached 99% color removal in the presence of hydrogen peroxide. The steady-state spectra confirmed the MB oxidation by the reduction of the fluorescence intensity. Besides, it has high stability, with no active phase leaching, proving a heterogeneous oxidation process.

Automated summary

The study developed iron/carbon-based catalysts prepared from biodiesel residues, glycerin, showing efficient methylene blue oxidation performance and high stability.