Oxidative Degradation of Methyl Orange Solution by Fe-MKSF Catalyst: Identification of Radical Species

Iron-immobilized montmorillonite KSF (Fe-MKSF) has been recognized as promising catalyst in degrading persistence organic contaminants. However, detailed mechanistic insight during the catalysis which involving the formation and identification of radical species were remained indeterminate due to co...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2018-06, Vol.374 (1), p.12031
Main Authors: Abdullah, N H, Selamat, M K A, Nasuha, N, Hassan, H, Zubir, N A
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Chemical synthesis
Contaminants
Degradation
Dyes
Hydroxyl radicals
Iron
Montmorillonite
Oxidation
Scavenging
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Iron-immobilized montmorillonite KSF (Fe-MKSF) has been recognized as promising catalyst in degrading persistence organic contaminants. However, detailed mechanistic insight during the catalysis which involving the formation and identification of radical species were remained indeterminate due to complex reaction. Inspiring by this gap, iron-immobilized clay (Fe-MKSF) was synthesized and used as heterogeneous catalyst in the oxidative degradation of methyl orange (MO) solution. Identification of radical species were determined through the inclusion of different types of radical scavenging agent during the Fenton-like reaction at optimum condition. Interestingly, dominant radical species were found to be hydroperoxyl radicals (*OOH) which subsequently followed by hydroxyl radicals (*OH) during the catalysis. Based on the percentage of MO removal, it was suggested that approximately 88% of the *OOH radicals existed at the interface of catalyst while 39% presence in bulk solution. Meanwhile, the interface *OH radicals promoted 38% of MO removal, whilst 4% by the bulk *OH radicals. Hence, these findings have conveyed novel insight on detailed radicals' identification as well as its' interaction during the catalysis.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/374/1/012031