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Degradation of Acid Blue 74 using Fe-ZSM5 zeolite as a heterogeneous photo-Fenton catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
47887 46485 2008 7 PDF Available
Title
Degradation of Acid Blue 74 using Fe-ZSM5 zeolite as a heterogeneous photo-Fenton catalyst
Abstract

Decolourisation and mineralization of an indigoid dye, C.I. Acid Blue 74, was conducted using Fe-ZSM5 zeolite as a catalyst in the presence of UV-C light and H2O2. The effects of different parameters such as amounts of catalyst, initial concentration of the dye and H2O2 and initial pH of the dye solution on the degradation efficiency of the process were assessed. The results indicated that by using 21.4 mmol l−1 of H2O2 and 0.5 g l−1 of the catalyst at pH 5, about 57% total organic carbon of a solution containing 8.56 × 10−5 mol l−1 Acid Blue 74 could be removed after 120 min in a 2 l batch photo-reactor. Leaching tests indicated that the activity of the catalyst is not due to leached iron ions, although an amount of about 0.3 mg l−1 iron ions was found in the aqueous solution. Significantly lower concentration of Fe2+ and Fe3+ in the solution after the treatment could give a great advantage to UV/Fe-ZSM5/H2O2 system over the homogeneous Fenton-type system. It was found that by using this catalyst, it is possible to expand the range of pH values for which Fenton-type oxidation can occur and no iron hydroxide sludge is formed. It was also observed that catalytic behaviour could be reproduced in consecutive experiments without a considerable drop in the process efficiency.

Keywords
Heterogeneous photo-Fenton; Fe-ZSM5; Indigoid dye; Dye degradation; Wastewater treatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 84, Issues 1–2, 25 October 2008, Pages 9–15
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us