Aerobic Biodegradation Pathway for Remazol Orange by Pseudomonas aeruginosa |
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Authors: | K Sarayu and S Sandhya |
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Institution: | (1) National Environmental Engineering Research Institute, CSIR Complex, Chennai, 600113, India; |
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Abstract: | Removal of azo dyes from effluent generated by textile industries is rather difficult. Azo dyes represent a major class of
synthetic colorants that are mutagenic and carcinogenic. Pseudomonas aeruginosa grew well in the presence of Remazol Orange (RO) and was able to decolorize and degrade it. In the present study, the decolorization
and degradation efficiency using single culture P. aeruginosa with RO and textile wastewaters is studied. The elucidation of decolorization pathway for P. aeruginosa is of special interest. The degradation pathway and the metabolic products formed during the degradation were also predicted
with the help of high performance liquid chromatography, Fourier transform infrared spectroscopy, and nuclear magnetic resonance
spectroscopy analysis. The data show the cleavage of the azo dye RO to form both methyl metanilic acid and 4-aminobenzoic
acid after decolorization and finally to oxidation forms benzoic acid, alkenes, aldehydes, and alkynes. The organism was able
to decolorize the dye RO and wastewater effectively to the maximum of 82.4% and 62%, respectively. |
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