Mineralization of aromatic amines liberated during the degradation of a sulfonated textile colorant using Klebsiella pneumoniae strain AHM

[Display omitted] •RO16 mineralization was effective by Klebsiella pneumoniae strain AHM.•Rapid RO16 decolorization and detoxification by K. pneumoniae strain AHM.•RO16 biotransformation into different bioactive products having pharmacological importance. An indigenous bacterium; Klebsiella pneumoni...

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Published in:	Process biochemistry (1991) 2017-06, Vol.57, p.181-189
Main Authors:	Kumar, Madhava Anil, Poonam, Seenichamy, Kumar, Vaidyanathan Vinoth, Baskar, Gurunathan, Seenuvasan, Muthulingam, Anuradha, Dhanasekaran, Sivanesan, Subramanian
Format:	Article
Language:	eng
Subjects:	Amines Aromatic amines Biochemistry Biodegradation Biotransformation Chlorophyll Coloring agents Decoloring Decolorization Detoxification Klebsiella Klebsiella pneumoniae Metabolism Mineralization Plant growth Reactive orange 16 Seedlings Sorghum Strain Studies Toxicology Triticum aestivum Wheat
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Summary:	[Display omitted] •RO16 mineralization was effective by Klebsiella pneumoniae strain AHM.•Rapid RO16 decolorization and detoxification by K. pneumoniae strain AHM.•RO16 biotransformation into different bioactive products having pharmacological importance. An indigenous bacterium; Klebsiella pneumoniae strain AHM was acclimated from the vicinities exposed to the frequent discharge of untreated textile recalcitrant compounds. The bacterium was employed to decolorize and mineralize a sulfonated textile colorant; reactive orange 16 (RO16). An equation for quantifying the average mineralization rate, AMRRO16μM/min of the liberated aromatic amines was established during the biotransformation. The strain had average decolorization and mineralization rate (ADRRO16 and AMRRO16) of 333.33μg/min and 0.46μM/min respectively, when incubated with 50mg/L RO16 under static condition. The inducible oxidoreductases along with the spectral and chromatographic analyses proved that the biotransformation was due to the metabolism of K. pneumoniae strain AHM. The toxicological assessment of plant growth parameters and the chlorophyll concentrations of Phaseolus mungo, Triticum aestivum and Sorghum bicolor seedlings revealed the reduced toxic nature of the mineralized products.
ISSN:	1359-5113 1873-3298