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

Paper ID Volume ID Publish Year Pages File Format Full-Text
27055 43997 2014 8 PDF Available
Title
Neutral solar photo-Fenton degradation of 4-nitrophenol on iron-enriched hybrid montmorillonite-alginate beads (Fe-MABs)
Abstract

•Solar photo-Fenton degradation of nitrophenol at neutral pH.•The use of environmental friendly materials to obtain alginate montmorillonite Fe-enriched beads (Fe-MABs).•The catalyst (Fe-MABs) reuse.

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 (R2 = 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.

Keywords
Iron alginate beads; Montmorillonite; Photodegradation; Photo-Fenton; 4-Nitrophenol
First Page Preview
Neutral solar photo-Fenton degradation of 4-nitrophenol on iron-enriched hybrid montmorillonite-alginate beads (Fe-MABs)
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 282, 15 May 2014, Pages 33–40
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering