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Decolourization of naphthalene-containing sulfonated azo dyes by Kerstersia sp. strain VKY1

Paper ID Volume ID Publish Year Pages File Format Full-Text
18279 42717 2007 8 PDF Available
Title
Decolourization of naphthalene-containing sulfonated azo dyes by Kerstersia sp. strain VKY1
Abstract

The dye-decolourizing bacterium was isolated from a coconut coir sample and identified as a Kerstersia sp. by 16S rRNA sequencing. It decolourized aerobically seven different naphthalene-containing sulfonated azo dyes such as Amaranth, Fast Red E, Ponceau S, Congo Red, Orange II, Acid Red 151 and Acid Orange 12. The bacterium decolourized Amaranth, Fast Red E, Congo Red and Ponceau S by 100% (100 mg L−1) and the remaining three dyes Orange II, Acid Orange 12 and Acid Red 151 were decolourized by 84%, 73% and 44%, respectively in 24 h. About 1 g L−1 concentration of Amaranth and Ponceau S were decolourized within 24 h, whereas only 0.6 g L−1 of Fast Red E was decolourized in 24 h. On the other hand a mixture of all the three dyes at 1 g L−1 concentration was decolourized within 26 h. The oxygen insensitive azoreductase activity of cell extract with respect to Amaranth, Fast Red E and Ponceau S were 0.069, 0.061 and 0.038 units mg−1 of protein respectively. The decolourization kinetics of the dyes with azoreductase enzyme supports the ping-pong mechanism. Further, the bacterium capable of decolourizing these naphthalene-containing sulfonated azo dyes required 0.5% of peptone, yeast extract and temperature of 38 °C for growth.

Keywords
Azo dye; Azoreductase; Decolourization; Kerstersia sp
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Decolourization of naphthalene-containing sulfonated azo dyes by Kerstersia sp. strain VKY1
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 40, Issue 2, 4 January 2007, Pages 204–211
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us