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Catalytic activity of Fe/SBA-15 for ozonation of dimethyl phthalate in aqueous solution

Paper ID Volume ID Publish Year Pages File Format Full-Text
47069 46457 2011 8 PDF Available
Title
Catalytic activity of Fe/SBA-15 for ozonation of dimethyl phthalate in aqueous solution
Abstract

The catalytic activity of iron-loaded SBA-15 (Fe/SBA-15) for ozonation of dimethyl phthalate (DMP) in aqueous solution was investigated. SBA-15 was synthesized by a hydrothermal method and Fe/SBA-15 was prepared by an incipient wetness impregnation method. The materials were characterized by a low and wide angle X-ray powder diffraction (XRD), N2 adsorption–desorption, and atomic absorption spectrometer (AAS). Under the chosen conditions (50 mg h−1 ozone dosage, 10 mg l−1 DMP solution and 0.20 g l−1 catalyst dosage), Fe/SBA-15/O3 process obviously improved DMP and total organic carbon (TOC) removal efficiency due to the generation of hydroxyl radical (HO), which was approved by tert-butanol (TBA). The mineralization of DMP followed an apparent first-order kinetics. The rate constant in Fe/SBA-15/O3 was 0.0058 min−1, 3.9 times higher than that of O3 alone, 3.4 and 1.9 times higher than those of SBA-15/O3 and Fe2O3/O3 processes respectively. The iron content, reaction temperature and initial pH of DMP solution played important roles in Fe/SBA-15/O3 process, while chloride ion exhibited the slight influence. The synergetic effect between O3 and Fe/SBA-15 adsorption illustrates that Fe/SBA-15 is a promising catalyst for ozonation process.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The mesoporous Fe/SBA-15 was used as a heterogeneous catalyst for ozonation of dimethyl phthalate (DMP) in aqueous solution. ► The mineralization rate constant of DMP with Fe/SBA-15/O3 is 3.9 times with that of O3 alone. ► There is a synergetic effect between O3 and Fe/SBA-15 adsorption. ► Fe/SBA-15 is a promising heterogeneous catalyst for ozonation of organic pollutants in aqueous solution.

Keywords
Fe/SBA-15; Catalytic ozonation; Dimethyl phthalate
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Catalytic activity of Fe/SBA-15 for ozonation of dimethyl phthalate in aqueous solution
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 106, Issues 1–2, 21 July 2011, Pages 264–271
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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