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ChemEngineering 2018, 2(3), 29; https://doi.org/10.3390/chemengineering2030029

Natural Hematite and Siderite as Heterogeneous Catalysts for an Effective Degradation of 4-Chlorophenol via Photo-Fenton Process

1
Laboratory of Water, Energy and Environment, National Engineering School, University of Sfax, P.O. Box 1173 W, 3038 Sfax, Tunisia
2
CNRS, Institut Jean Le Rond d’Alembert, Sorbonne Université, 2 place de la gare de ceinture, 78210 Saint-Cyr-L’Ecole, France
*
Author to whom correspondence should be addressed.
Received: 18 May 2018 / Revised: 9 June 2018 / Accepted: 9 June 2018 / Published: 21 June 2018
(This article belongs to the Special Issue Heterogeneous Photocatalysis and Photocatalytic Nanomaterials)
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Abstract

This paper describes a simple and low-cost process for the degradation of 4-Chlorophenol (4-CP) from aqueous solution, using natural Tunisian Hematite (M1) and Siderite (M2). Two natural samples were collected in the outcroppings of the Djerissa mining site (Kef district, northwestern Tunisia). Both Hematite and Siderite ferrous samples were characterized using several techniques, including X-Ray Diffraction (XRD), Nitrogen Physisorption (BET), Infrared Spectroscopy (FTIR), H2-Temperature Programmed Reduction (H2-TPR), Scanning Electronic Microscopy (SEM) linked with Energy Dispersive X-ray (EDS) and High-Resolution Transmission Electron Microscopy (HRTEM). Textural, structural and chemical characterization confirmed the presence of Hematite and Siderite phases with a high amount of iron on the both surface materials. Their activity was evaluated in the oxidation of 4-CP in aqueous medium under heterogeneous photo-Fenton process. Siderite exhibited higher photocatalytic oxidation activity than Hematite at pH 3. The experimental results also showed that 100% conversion of 4-CP and 54% TOC removal can be achieved using Siderite as catalyst. Negligible metal leaching and catalyst reutilization without any loss of activity point towards an excellent catalytic stability for both natural catalysts. View Full-Text
Keywords: heterogeneous catalysts; photo-Fenton; hematite; siderite; oxidation; 4-chlorophenol heterogeneous catalysts; photo-Fenton; hematite; siderite; oxidation; 4-chlorophenol
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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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Bel Hadjltaief, H.; Sdiri, A.; Gálvez, M.E.; Zidi, H.; Da Costa, P.; Ben Zina, M. Natural Hematite and Siderite as Heterogeneous Catalysts for an Effective Degradation of 4-Chlorophenol via Photo-Fenton Process. ChemEngineering 2018, 2, 29.

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