Preparation of TiO<inf>2</inf>nanoparticle from Ti-salt flocculated sludge with dye wastewater

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Journal Article
Journal of Nanoscience and Nanotechnology, 2010, 10 (5), pp. 3260 - 3265
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Dye wastewater flocculation using TiCl4and FeSO4coagulants was studied for organic removal and precipitation efficiency. Moreover, TiCl4was assessed in a pilot-scale flocculation process to investigate organic removal and solution pH effect. A large amount of TiO2was produced from sludge of Ti-salt flocculation in dye wastewater. This flocculation process simultaneously reduces a large amount of sludge produced from wastewater. The TiO2nanoparticle was characterized in terms of physical and chemical properties. Results showed that 77.6% of organic matter was removed from dye wastewater when using FeSO4as coagulant, while TiCl4degraded 75.9% of organic matter. On the other hand, floc precipitation efficiency was better for TiCl4if compared with FeSO4. The optimum concentration of TiCl4for pilot-scale flocculation was found to be equal to 2.1 g/L DWT (Dye wastewater titania) size was 15-20 nm, mainly doped with carbon atoms and exhibited a dominant anatase structure. DWT was similar to P-25 in decomposing acetaldehyde under UV-irradiation and complete photocatalytic degradation was achieved after 140 min. Copyright © 2010 American Scientific Publishers All rights reserved.
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