TITLE:
Decolourization and Mineralization of Aqueous Solution Containing C. I. Basic Blue 66 in the Presence of Titanium Dioxide
AUTHORS:
Abdulraheem Giwa, Peter Obinna Nkeonye, Kasali Ademola Bello, Emmanuel Ggadebo Kolawole
KEYWORDS:
Photocatalysis; Azo Dyes; Titanium Dioxide
JOURNAL NAME:
Journal of Environmental Protection,
Vol.4 No.8,
August
5,
2013
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.