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Investigations on Cationic Dye Degradation Using Iron-Doped Carbon Xerogel

1
Department of Chemistry, Indiana University of Pennsylvania, Indiana, PA 15705, USA
2
Preclinic Department, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Manastur, 400372 Cluj-Napoca, Romania
3
Electronic Microscopy Laboratory and Department of Molecular Biology and Biotechnology, Babeș-Bolyai University, 44 George Bilascu Street, 400015 Cluj-Napoca, Romania
*
Author to whom correspondence should be addressed.
ChemEngineering 2019, 3(3), 61; https://doi.org/10.3390/chemengineering3030061
Received: 1 May 2019 / Revised: 31 May 2019 / Accepted: 28 June 2019 / Published: 4 July 2019
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Abstract

Iron-doped carbon xerogels were prepared using sol-gel synthesis, with potassium-2,4-dihydroxybenzoate and formaldehyde as starting materials, followed by an ion exchange step. The obtained samples were characterized (XRD, FTIR, SED-EDX, TEM) and investigated as catalysts in heterogeneous Fenton and catalytic wet air oxidation (CWAO) processes. Experiments were conducted in the same conditions (0.1 g catalysts, 25 mL of 100 mg/L dye solution, 25 °C, initial solution pH, 3 h) in thermostated batch reaction tubes (shaking water bath, 50 rpm) at atmospheric pressure. A series of three cationic dyes were considered: Brilliant green (BG), crystal violet (CV), and methyl green (MG). Dyes and TOC removal efficiencies up to 99% and 92%, respectively, were obtained, in strong correlation with the iron content of the catalyst. Iron content measured in solution at the end of the reaction, indicated that its amount was less than 2 ppm for all tested catalysts. View Full-Text
Keywords: brilliant green; crystal violet; methyl green; heterogeneous fenton; catalytic wet air oxidation; iron-doped carbon xerogel brilliant green; crystal violet; methyl green; heterogeneous fenton; catalytic wet air oxidation; iron-doped carbon xerogel
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Maicaneanu, S.A.; McGhee, B.; Stefan, R.; Barbu-Tudoran, L.; Sedwick, C.; Lake, C.H. Investigations on Cationic Dye Degradation Using Iron-Doped Carbon Xerogel. ChemEngineering 2019, 3, 61.

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