Use of iron and bio-oil wastes to produce highly dispersed Fe/C composites for the photo-Fenton reaction.
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2017
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This work describes the synthesis, characterization,
and application of an active heterogeneous photo-Fenton system
obtained from two different wastes, i.e., laterite (an iron
mining waste) and the acid aqueous fraction (AAF) from biooil
production. AAF with high acidity (ca. 3 molH+L−1) and
organic concentration (25 wt.%) obtained from biomass flash
pyrolysis was used for the efficient extraction of Fe3+ from
laterite waste. After extraction, the mixture Fe3+/AAF was
dried and treated at different temperatures, i.e., 500, 650,
and 800 °C, to obtain Fe/C reactive composites. Mössbauer,
XRD, TG, elemental analyses, and SEM/EDS showed the
presence of highly disperse Fe oxide nanoparticles at 500
and 650 °C and Fe0 particles in the material obtained at
800 °C with carbon contents varying from 74 to 80 %. The
three composites were tested as heterogeneous catalysts in the
photo-Fenton reaction for the oxidation of the model dye
contaminant methylene blue, showing high activities at neutral
pH.
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Laterite, Acid aqueous fraction
Citação
MENDONÇA, F. G. et al. Use of iron and bio-oil wastes to produce highly dispersed Fe/C composites for the photo-Fenton reaction. Environmental Science and Pollution Research International, v. 24, n. 7, p. 6151-5156, mar. 2017. Disponível em: <https://link.springer.com/article/10.1007%2Fs11356-016-6480-0>. Acesso em: 05 ago. 2017.