Biodegradation of textile azo dye by Shewanella decolorationis S12 under microaerophilic conditions
0106 biological sciences
Shewanella
Molecular Structure
Textiles
01 natural sciences
Aerobiosis
Carbon
Gas Chromatography-Mass Spectrometry
Kinetics
Biodegradation, Environmental
Anaerobiosis
Biomass
Coloring Agents
Azo Compounds
Chromatography, High Pressure Liquid
DOI:
10.1007/s00253-007-1032-7
Publication Date:
2007-06-22T15:45:00Z
AUTHORS (3)
ABSTRACT
The complete biodegradation of azo dye, Fast Acid Red GR, was observed under microaerophilic conditions by Shewanella decolorationis S12. Although the highest decolorizing rate was measured under anaerobic condition and the highest biomass was obtained under aerobic condition, a further biodegradation of decolorizing products can only be achieved under microaerophilic conditions. Under microaerophilic conditions, S. decolorationis S12 could use a range of carbon sources for azo dye decolorization, including lactate, formate, glucose and sucrose, with lactate being the optimal carbon source. Sulfonated aromatic amines were not detected during the biotransformation of Fast Acid Red GR, while H(2)S formed. The decolorizing products, aniline, 1,4-diaminobenzene and 1-amino-2-naphthol, were followed by complete biodegradation through catechol and 4-aminobenzoic acid based on the analysis results of GC-MS and HPLC.
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