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ZnO-mediated solar photocatalytic degradation of azo dye

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Main Author: Siti Zharifah, Roba’ai
Other Authors: Salwa Zaini Makhtar
Format: Learning Object
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2013
Subjects:
Textile industry
Textile wastewater
Azo dye
Decolourization
Solar photocatalytic
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/23612
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spelling my.unimap-236122013-02-16T06:37:31Z ZnO-mediated solar photocatalytic degradation of azo dye Siti Zharifah, Roba’ai Salwa Zaini Makhtar Textile industry Textile wastewater Azo dye Decolourization Solar photocatalytic Access is limited to UniMAP community. Wastewaters generated from the textile industry contain large amounts of azo dyes which, owning to their non-biodegradability, toxicity and potential carcinogenic nature, constitute a major threat to the surrounding ecosystem. Environmental concerns and the need of meeting the stringent international standards for rejecting wastewaters has made the development of novel, efficient and low cost methods for the purification of textile aqueous effluents an issues of major importance. ZnO-mediated solar photocatalytic has been shown to be a potentially advantageous process as it may lead to complete mineralization at ambient conditions with the use of solar light as the energy sources. In the present study, the photocatalytic degradation of a model textile azo dye (Acid Orange 7, AO7) in aqueous solution is investigated with the use of ZnO photocatalyst. The effect of various parameters such as catalyst loading (0.5 g/L – 2.5 g/L), initial dye concentration (50 – 200 mg/L), and color removal on the degradation of dye has been studied. The reaction pathway of dye degradation was also investigated by monitoring the final product in solution, with the use of a technique including UV-Vis spectrophotometer. Catalyst loading affects decolourization efficiency of Acid Orange 7 which is maximized at about 2.5 g/L catalyst loading where colour removal was 99.8% while for effect of initial dye concentration which is 50 mg/L, the colour removal was 92%. 2013-02-16T06:37:31Z 2013-02-16T06:37:31Z 2010-04 Learning Object http://hdl.handle.net/123456789/23612 en Universiti Malaysia Perlis (UniMAP) School of Environmental Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Textile industry
Textile wastewater
Azo dye
Decolourization
Solar photocatalytic
spellingShingle Textile industry
Textile wastewater
Azo dye
Decolourization
Solar photocatalytic
Siti Zharifah, Roba’ai
ZnO-mediated solar photocatalytic degradation of azo dye
description Access is limited to UniMAP community.
author2 Salwa Zaini Makhtar
author_facet Salwa Zaini Makhtar
Siti Zharifah, Roba’ai
format Learning Object
author Siti Zharifah, Roba’ai
author_sort Siti Zharifah, Roba’ai
title ZnO-mediated solar photocatalytic degradation of azo dye
title_short ZnO-mediated solar photocatalytic degradation of azo dye
title_full ZnO-mediated solar photocatalytic degradation of azo dye
title_fullStr ZnO-mediated solar photocatalytic degradation of azo dye
title_full_unstemmed ZnO-mediated solar photocatalytic degradation of azo dye
title_sort zno-mediated solar photocatalytic degradation of azo dye
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2013
url http://dspace.unimap.edu.my/xmlui/handle/123456789/23612
_version_ 1643794061906149376
score 13.222552

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