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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 10, No. 6, 2013, pp. 1265-1274
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Bioline Code: st13123
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 10, No. 6, 2013, pp. 1265-1274
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Photocatalytic degradation of azo dye Orange II in aqueous solutions using copper-impregnated titania
Divya, N.; Bansal, A. & Jana, A. K.
Abstract
During dyeing process, industries consume
large quantity of water and subsequently produce large
volume of wastewater. This wastewater is rich in color and
contains different dyes. Orange II is one of them. In this
article, metal-impregnated TiO
2
P-25 catalyst was used to
enhance the photocatalytic degradation of Orange II dye.
Photodegradation percentage was followed spectrophotometrically by the measurements of absorbance at
λ
max
=
483 nm. The effect of copper-impregnated TiO
2
P-25 photocatalyst for the degradation of Orange II has
been investigated in terms of percentage removal of color,
chemical oxygen demand (COD) and total organic carbon
(TOC). As such 98 % color removal efficiency, 97 %
percentage removal of COD and 89 % percentage removal
of TOC was achieved with TiO
2
P-25/Cu catalysts under
typical conditions. Copper-impregnated TiO
2
P-25 photo-
catalyst showed comparatively higher activity than UV/
H
2
O
2
homogeneous photodegradation. The relative electrical energy consumption for photocatalytic degradation
was considerably lower with TiO
2
P-25/Cu photocatalyst han that with homogeneous photodegradation. Transmission electron microscopic analysis was used for catalyst
characterization.
Keywords
Degradation; Electrical energy requirement per order; Mineralization; Orange II; Photocatalyst; Transmission electron microscopic analysis
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