Mechanistic study of carmoisine dye degradation in aqueous solution by Fenton process

The carmoisine azo dye (AR14) solution 1 g/L was degraded by Fenton process under the following conditions: [Fe2+] = 3.57 mmol/L, [H2O2] = 194 mmol/L at pH = 3.0. The degradation pathway of AR14 by the Fenton process was investigated by means of IR, LC-MS-MS and Ion Chromatography analysis. Some aro...

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Bibliographic Details
Main Authors: Wakrim, A., Dassaa, A., Zaroual, Z., EL Ghachtouli, S., Jamal Eddine, J., Azzi, M.
Format: Conference Proceeding
Language:English
Subjects:
Azo dye
Carmoisine
Decolorization
Degradation
Fenton process
Mechanism
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Summary:The carmoisine azo dye (AR14) solution 1 g/L was degraded by Fenton process under the following conditions: [Fe2+] = 3.57 mmol/L, [H2O2] = 194 mmol/L at pH = 3.0. The degradation pathway of AR14 by the Fenton process was investigated by means of IR, LC-MS-MS and Ion Chromatography analysis. Some aromatic anions such as 5,8-dihydroxy-2-nitronaphthalen-1-olate, benzoate, 5-hydroxy-4-nitro-2-sulfonatobenzoate and naphthalene-1-sulfonate were formed and identified. Moreover, a quantitative analysis of inorganic ions (sulfate and nitrate) produced during the degradation process helped to verify molar balance with regard to original sulfur and nitrogen elements. A feasible degradation pathway of AR14 was proposed and discussed. The reaction mechanisms proposed in this research should prove useful for future application of the technology to dyes decolorization.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2020.08.405