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Iron oxide dispersed over activated carbon: Support influence on the oxidation of the model molecule methylene blue

Paper ID Volume ID Publish Year Pages File Format Full-Text
42431 45925 2009 6 PDF Available
Title
Iron oxide dispersed over activated carbon: Support influence on the oxidation of the model molecule methylene blue
Abstract

In this work materials based on iron oxide dispersed over activated carbon were prepared and tested in the H2O2 decomposition and removal of the methylene blue (MB) model from aqueous solution. Two different supports were evaluated: a commercial activated carbon (CAC) and an activated carbon produced by coffee used grounds (ACK). These materials, after iron impregnation (CAC/Fe and ACK/Fe), were characterized using XRD, SEM, N2-sorption, XPS and Mössbauer spectroscopy. The main results suggest the formation of composites with high surface area and iron dispersion containing Fe3+ on the surface of both catalysts. Catalytic tests revealed high capacity for H2O2 decomposition by both composites with more activity for ACK/Fe. MB removal experiments showed intense removal of the model through combined adsorption and oxidation processes. The detection of known MB oxidation intermediates observed by ESI-MS studies confirmed the occurrence of MB oxidation processes and also showed more activity for ACK/Fe.

Graphical abstractCatalysts based on iron oxide dispersed over activated carbon were prepared and characterized by XRD, SEM, N2-sorption, XPS and Mössbauer spectroscopy. Two different supports were evaluated: a commercial activated carbon (CAC/Fe) and an activated carbon produced by coffee used grounds (ACK/Fe). Catalytic tests towards H2O2 decomposition and methylene blue removal revealed higher activity for the ACK/Fe.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Activated carbon; Iron oxide; Heterogeneous Fenton process
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Iron oxide dispersed over activated carbon: Support influence on the oxidation of the model molecule methylene blue
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 367, Issues 1–2, 1 October 2009, Pages 53–58
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
Full-text PDF Download
Online Support
Any Questions? feel free to contact us