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Effects of auxiliary chemicals on the ozonation of industrial dyes

The effect of commonly used auxiliary chemicals (primasol, sodium hydroxide and sodium hydrosulphite) and the initial dye concentration on the oxidation of three industrial dyes (Vat Blue, Disperse Blue 79 and Disperse Red 72) has been studied. In the batch studies, the oxidation of dye molecules by...

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Main Authors: Ramasamy, R.K., Rahman, N.A., Wong, C.S., Bakar, N.K.A.
Format: Article
Published: Faculty of Science, University of Malaya 2005
Subjects:
QD Chemistry
Online Access:http://eprints.um.edu.my/6250/
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spelling my.um.eprints.62502021-04-27T08:06:19Z http://eprints.um.edu.my/6250/ Effects of auxiliary chemicals on the ozonation of industrial dyes Ramasamy, R.K. Rahman, N.A. Wong, C.S. Bakar, N.K.A. QD Chemistry The effect of commonly used auxiliary chemicals (primasol, sodium hydroxide and sodium hydrosulphite) and the initial dye concentration on the oxidation of three industrial dyes (Vat Blue, Disperse Blue 79 and Disperse Red 72) has been studied. In the batch studies, the oxidation of dye molecules by ozone was examined with single-solute dye solution. Our results showed that the efficiencies of dye removal were in the range 68-74 and 80-85 at an oxidation time of 10 minutes and 2 hours respectively. The effect of each of the three auxiliaries on the single- and multi-solute dye solutions were assessed in terms of colour, COD and TOC variation. The addition of primasol showed exertion on ozone demand as reflected by the COD and TOC results while sodium hydroxide enhanced the oxidation of Disperse Blue 79. The presence of sodium hydroxide also reduced the colour removal and the reduction of COD in the oxidation of Vat Blue dye as well as the mixture of three dyes studied. Sodium hydrosulphite being a strong reducing agent exerted a significant demand on ozone, reducing amount of ozone available to oxidize the dye molecules. Faculty of Science, University of Malaya 2005 Article PeerReviewed Ramasamy, R.K. and Rahman, N.A. and Wong, C.S. and Bakar, N.K.A. (2005) Effects of auxiliary chemicals on the ozonation of industrial dyes. Malaysian Journal of Science, 24 (2). pp. 109-116. ISSN 1394-3065
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Ramasamy, R.K.
Rahman, N.A.
Wong, C.S.
Bakar, N.K.A.
Effects of auxiliary chemicals on the ozonation of industrial dyes
description The effect of commonly used auxiliary chemicals (primasol, sodium hydroxide and sodium hydrosulphite) and the initial dye concentration on the oxidation of three industrial dyes (Vat Blue, Disperse Blue 79 and Disperse Red 72) has been studied. In the batch studies, the oxidation of dye molecules by ozone was examined with single-solute dye solution. Our results showed that the efficiencies of dye removal were in the range 68-74 and 80-85 at an oxidation time of 10 minutes and 2 hours respectively. The effect of each of the three auxiliaries on the single- and multi-solute dye solutions were assessed in terms of colour, COD and TOC variation. The addition of primasol showed exertion on ozone demand as reflected by the COD and TOC results while sodium hydroxide enhanced the oxidation of Disperse Blue 79. The presence of sodium hydroxide also reduced the colour removal and the reduction of COD in the oxidation of Vat Blue dye as well as the mixture of three dyes studied. Sodium hydrosulphite being a strong reducing agent exerted a significant demand on ozone, reducing amount of ozone available to oxidize the dye molecules.
format Article
author Ramasamy, R.K.
Rahman, N.A.
Wong, C.S.
Bakar, N.K.A.
author_facet Ramasamy, R.K.
Rahman, N.A.
Wong, C.S.
Bakar, N.K.A.
author_sort Ramasamy, R.K.
title Effects of auxiliary chemicals on the ozonation of industrial dyes
title_short Effects of auxiliary chemicals on the ozonation of industrial dyes
title_full Effects of auxiliary chemicals on the ozonation of industrial dyes
title_fullStr Effects of auxiliary chemicals on the ozonation of industrial dyes
title_full_unstemmed Effects of auxiliary chemicals on the ozonation of industrial dyes
title_sort effects of auxiliary chemicals on the ozonation of industrial dyes
publisher Faculty of Science, University of Malaya
publishDate 2005
url http://eprints.um.edu.my/6250/
_version_ 1698697303982866432
score 13.251813

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