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Rice Husk: Raw Material in the Catalyst Preparation for Advanced Oxidative Processes Applied in the Industrial Effluent Treatment and from Acid Drainage of a Mine

Application of an agricultural residue (rice husk, RH) as a raw material for catalyst support for advanced oxidative processes (AOPs) was evaluated. The supported catalyst was produced by the calcination of TiCl 4 impregnated in RH, thereby providing a composite TiO 2 /Si-C, which was characterized...

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Published in:Water, air, and soil pollution air, and soil pollution, 2013, Vol.224 (1), p.1-11, Article 1396
Main Authors: Lattuada, R. M., Radtke, C., Peralba, M. C. R., Dos Santos, J. H. Z.
Format: Article
Language:English
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Summary:Application of an agricultural residue (rice husk, RH) as a raw material for catalyst support for advanced oxidative processes (AOPs) was evaluated. The supported catalyst was produced by the calcination of TiCl 4 impregnated in RH, thereby providing a composite TiO 2 /Si-C, which was characterized by elemental analysis (CHN), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM–EDX), X-ray photoelectron spectroscopy (XPS), UV/VIS diffuse reflectance spectroscopic (DRS), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), atomic force microscopy (AFM), SEM, and nitrogen adsorption–desorption isotherms (BET and BJH). Catalytic photodecomposition of methylene blue (MB), naphthalene, phenol, and abamectin and acid drainage of a mine by a titania-based catalyst composite were investigated. For comparative purposes, a commercial photocatalyst (TiO 2 ) was also employed. Photocatalytic degradation of MB, phenol, naphthalene, abamectin, and from coal mining effluent ranged from 8 to 93 % of the initial concentration. Performances of both catalysts were comparable. Additionally, in these evaluated systems, the toxicity of the effluent decreased after photocatalysis, either for Daphnia magna or for Scenedesmus subspicatus (employed as bioindicators).
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-012-1396-x