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

Abdulraheem Giwa, Peter Obinna Nkeonye, Kasali Ademola Bello, Emmanuel Ggadebo Kolawole

Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria.

DOI: 10.4236/jep.2013.48089                

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.

Keywords

Photocatalysis; Azo Dyes; Titanium Dioxide

Conflicts of Interest

The authors declare no conflicts of interest.

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