ORIGINAL RESEARCH
Decolorization of Textile Dye Reactive Blue 221 by Bacteria Isolated from Anthropogenic Dye-Contaminated Soil
Sadia Mumtaz, Noshaba Hassan Malik, Iffat Naz, Safia Ahmed
 
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Microbiology Research Laboratory, Department of Microbiology, Quaid-i-Azam University
Islamabad, 45320, Pakistan
 
 
Pol. J. Environ. Stud. 2015;24(4):1705-1716
 
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ABSTRACT
The present study was conducted to evaluate the degradative potential of indigenous bacterial isolates for Reactive Blue 221. The two strains proficient in decolorization (>80%) were isolated from a waste disposal site by enrichment technique. Under optimized conditions, Pseudomonas sp. BDS 2 displayed efficient decolorization activity of 94.4% in Minimal Salt Medium supplemented with 50 mg/l of RB 221 after 96 h of incubations, whereas 88.5% of color was removed by Alcaligenes sp. BDS 9 by the end of 112 h. UV-Visible and FTIR spectroscopy confirmed that in the case of Pseudomonas sp. BDS 2 and Alcaligenes sp. BDS 9, decolorization was the ultimate consequence of biodegradation and adsorption, respectively. Toxicological studies revealed the nontoxic nature of degradative metabolites.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
eISSN:2083-5906
ISSN:1230-1485
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