Biodegradation of reactive textile dye Red BLI by an isolated bacterium Pseudomonas sp. SUK1

• Published in: Bioresource technology Vol. 99; no. 11; pp. 4635 - 4641
• Main Authors: Kalyani, D.C., Patil, P.S., Jadhav, J.P., Govindwar, S.P.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01.07.2008; [New York, NY]: Elsevier Ltd; Elsevier Science
• Subjects: Azo Compounds - metabolism; Azo Compounds - toxicity; Bacteria; Biodegradation, Environmental - drug effects; Biological and medical sciences; Biotechnology; Cell Death - drug effects; Color; Coloring Agents - metabolism; Coloring Agents - toxicity; Dye decolorization; Environment and pollution; Enzymes - metabolism; Fundamental and applied biological sciences. Psychology; Industrial applications and implications. Economical aspects; Isolation; Phaseolus; Phytotoxicity; Pseudomonas; Pseudomonas - enzymology; Pseudomonas - isolation & purification; Reactive textile dyes; Red BLI; Sorghum vulgare; Spectrophotometry, Ultraviolet; Spectroscopy, Fourier Transform Infrared; Textiles; India; Isolation; Red BLI; Phytotoxicity; Reactive textile dyes; Dye decolorization; Pseudomonadales; Biodegradation; Decolorizing process; Pseudomonas; Reactive dye; Pseudomonadaceae; Bacteria; Textile industry
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2007.06.058

A novel bacterial strain capable of decolorizing reactive textile dye Red BLI is isolated from the soil sample collected from contaminated sites of textile industry from Solapur, India. The bacterial isolate was identified as Pseudomonas sp. SUK1 on the basis of 16S rDNA analysis. The Pseudomonas sp. SUK1 decolorized Red BLI (50 mg l −1) 99.28% within 1 h under static anoxic condition at pH range from 6.5 to 7.0 and 30 °C. This strain has ability to decolorize various reactive textile dyes. UV–Vis spectroscopy, FTIR and TLC analysis of samples before and after dye decolorization in culture medium confirmed decolorization of Red BLI. A significant increase in the activities of aminopyrine N-demethylase and NADH-DCIP reductase in cells obtained after decolorization indicates involvement of these enzymes in the decolorization process. Phytotoxicity testing with the seeds of Sorghum vulgare and Phaseolus mungo, showed more sensitivity towards the dye, while the products obtained after dye decolorization does not have any inhibitory effects.