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Title of Journal: World J Microbiol Biotechnol

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Abbravation: World Journal of Microbiology and Biotechnology

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Springer Netherlands

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DOI

10.1007/978-3-540-75520-3_15

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1573-0972

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Decolorization of diazo dye Direct Red 81 by a nov

Authors: Nishant Junnarkar D Srinivas Murty Nikhil S Bhatt Datta Madamwar
Publish Date: 2005/11/25
Volume: 22, Issue: 2, Pages: 163-168
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Abstract

Samples collected from various effluentcontaminated soils in the vicinities of dyestuff manufacturing units of Ahmedabad India were studied for screening and isolation of organisms capable of decolorizing textile dyes A novel bacterial consortium was selected on the basis of rapid decolorization of Direct Red 81 DR 81 which was used as model dye The bacterial consortium exhibited 90 decolorization ability within 35 h Maximum rate of decolorization was observed when starch 06 g l−1 and casein 09 g l−1 were supplemented in the medium Decolorization of DR 81 was monitored by high performance thin layer chromatography which indicated that dye decolorization was due to its degradation into unidentified intermediates The optimum dyedecolorizing activity of the culture was observed at pH 70 and incubation temperature of 37 °C Maximum dyedecolorizing efficiency was observed at 200 mg l−1 concentration of DR 81 The bacterial consortium had an ability to decolorize nine other structurally different azo dyes

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