Detoxification of hexavalent chromium in wastewater containing organic substances using simonkolleite-TiO2 photocatalyst |
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| Institution: | 1. Water Pollution Research Department, National Research Centre, 33 El Bohouth st. (El Tahrir st. former)-Dokki-Giza-Egypt, P.O. 12622, Egypt;2. Faculty of Science, Fayoum University, Fayoum, Egypt;3. Egypt Nanotechnology Research Center, Cairo University, Elsheikh Zayed Campus, Giza, Egypt;4. Arab Academy for Science, Technology, and Maritime Transport, Smart Village Campus, Giza, Egypt;5. Lehrstuhlfür Technische Chemie II and Centre for Water and Environmental Research (ZWU), Universität Duisburg-Essen, 45117 Essen, Germany;6. Faculty of Science, Chemistry Department, Ain Shams University, Cairo, Egypt;1. Department of Infrastructure Engineering, University of Melbourne, Victoria 3010, Australia;2. Department of Civil Engineering, Monash University, Victoria 3800, Australia;3. Olympic Dam Operations, BHP Billiton, Roxby Downs, SA 5725, Australia;1. Faculty of Industrial Technology, Suansunandha Rajhabhat University, Thailand;2. Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology, Klong 6, Thanyaburi, Pathumthani, 12110, Thailand;3. School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, Australia;1. von Karman Institute, Environmental and Applied Fluid Dynamics Department, 72, Chaussée de Waterloo, B1640 Rhode-St-Genèse, Belgium;2. Department of Mechanical and Materials Engineering, Queen''s University, Kingston, Ontario, Canada;3. Ecole des Mines d’Alès, Laboratoire Génie de l’Environnement Industriel, Alès, France;4. CEA, DAM, GRAMAT, F-46500 Gramat, France;1. Department of Natural and Life Sciences, Faculty of Sciences, University of Batna, Batna 05000, Algeria;2. Department of Natural and Life Sciences, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa 12002, Algeria;3. Veterinary and Agricultural Sciences Institute, Department of Veterinary Sciences, University of Batna, Batna 05000, Algeria;4. Department of Chemical Engineering, Faculty of Sciences and Technology, University of Khenchela, Khenchela 40004, Algeria;1. Department of Mechanical Engineering, Federal University of Paraná, 81531-980, Curitiba-PR, Brazil;2. Department of Chemistry, Federal University of Paraná, 81531-980, Curitiba-PR, Brazil;3. Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193, Aveiro, Portugal |
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| Abstract: | Innovative simple method for the preparation of simonkolleite-TiO2 photocatalyst with different Zn contents was achieved. The prepared photocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), FT-IR, Raman and diffuse reflectance spectroscopy techniques. The photocatalytic activities of the materials were evaluated for the simultaneous detoxification of hexavalent chromium (Cr(VI)) and oxidation of organic compounds commonly present in wastewater under simulated solar light. The best photoreduction efficiency of Cr(VI) has been achieved at 1000 ppm simonkolleite-TiO2 photocatalyst of 5% Zn/TiO2 weight ratio, and pH value of 2.5 to enhance the adsorption onto catalyst surface. Photoreduction was significantly improved by using formic acid as holes scavenger owing to its chemical adsorption on the catalyst surface. Finally, 100% photoreduction of Cr(VI) could be achieved using formic/simonkolleite-TiO2 systems under sunlight. |
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| Keywords: | Simonkolleite Cr(VI) Detoxification Photoreduction Organic oxidation |
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