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RESEARCH PRODUCT

Neutral solar photo-Fenton degradation of 4-nitrophenol on iron-enriched hybrid montmorillonite-alginate beads (Fe-MABs)

Andrea PaceSalvatore BarrecaCesar PulgarinJulia Janeth Velez ColmenaresSantino Orecchio

subject

Iron alginate beadsPhoto-FentonIron alginate beads Montmorillonite Photodegradation Photo-Fenton 4-NitrophenolChemistryGeneral Chemical EngineeringInorganic chemistryKineticsGeneral Physics and AstronomyInfrared spectroscopy4-NitrophenolGeneral ChemistryCatalysislaw.inventionchemistry.chemical_compoundMontmorillonitelaw4-NitrophenolPhotodegradationPhotodegradationAtomic absorption spectroscopyHydrogen peroxideMontmorilloniteIron alginate beadsMontmorillonitePhotodegradationPhoto-Fenton4-Nitrophenol

description

Hybrid montmorillonite-alginate beads (MABs) were prepared by the ion-gelation method from alginate and montmorillonite clay suspension dropped in a calcium chloride solution. Similarly, iron-enriched beads (Fe-MABs) were prepared using iron-exchanged montmorillonite. All beads were characterized by atomic absorption and Fourier-transform infrared spectroscopy. The efficiency of Fe-MABs as catalysts for the solar photo-Fenton performed at initial pH = 7.0 was evaluated by varying the catalyst amount and hydrogen peroxide concentration, and monitoring the removal of 4-nitrophenol (4-NP) at initial concentration of 10 ppm. A kinetic analysis showed that the removal of 4-NP by Fe-MABs followed a pseudo first-order kinetics model (R-2 = 0.966). High 4-NP removal (75%) was achieved with 25 Fe-MABs by using 150 ppm of hydrogen peroxide and 40 min of irradiation, while total 4-NP removal was obtained by using 500 ppm of hydrogen peroxide. Moreover, preliminary studies about beads' recycling showed good removal efficiencies for the first three cycles. (C) 2014 Elsevier B.V. All rights reserved.

yearjournalcountryeditionlanguage
2014-01-01Journal of Photochemistry and Photobiology A: Chemistry
https://doi.org/10.1016/j.jphotochem.2014.02.008