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Decolourization and Mineralization of Aqueous Solution Containing C. I. Basic Blue 66 in the Presence of Titanium Dioxide

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Author(s): Abdulraheem Giwa | Peter Obinna Nkeonye | Kasali Ademola Bello | Emmanuel Ggadebo Kolawole

Journal: Journal of Environmental Protection
ISSN 2152-2197

Volume: 04;
Issue: 08;
Start page: 766;
Date: 2013;
Original page

Keywords: Photocatalysis | Azo Dyes | Titanium Dioxide

ABSTRACT
Heterogeneous photocatalysis is an advanced oxidation process (AOP), which can be successfully used to oxidize many organic pollutants present in aqueous systems. This research studied the photocatalytic degradation of C. I. Basic Blue 66 (BB 66) in the presence of TiO2 P-25 Degussa as a photocatalyst. The influence of various parameters, such as mass of catalyst, initial concentration of dye and pH on the degradation process was examined. The degradation of the dye followed a pseudo-first-order kinetics according to the Langmuir-Hinshelwood model and decolourization was achieved within 80 min of light exposure. The mineralization of organic carbon was also evaluated by measuring the dissolved organic carbon (DOC) of the dye solutions.
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