Effective biotransformation and detoxification of anthraquinone dye REACTIVE BLUE 4 (cas 13324-20-4) by using aerobic bacterial granules
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Add time:07/19/2019 Source:sciencedirect.com
Treatment of textile wastewater containing anthraquinone dye is quite a huge challenge due to its complex aromatic structure and toxicity. Present study deals with the degradation and detoxification of anthraquinone dye REACTIVE BLUE 4 (cas 13324-20-4) using aerobic bacterial granules. Bacterial granules effectively decolorized reactive blue 4 at wide range of pH (4.0–11.0) and temperature (20–55 °C) as well as decolorized and tolerated high concentration of reactive blue 4 dye upto 1000 mg l−1 with Vmax 6.16 ± 0.82 mg l−1 h−1 and Km 227 ± 41 mg l−1. Metagenomics study evaluates important role of Clostridia, Actinobacteria, and Proteobacterial members in biotransformation and tolerance of high concentrations of reactive blue 4 dye. Up-regulation of xenobiotic degradation and environmental information processing pathways during dye exposure signifies their noteworthy role in dye degradation. Biotransformation of dye was confirmed by significant decrease in the values of total suspended solids, biological and chemical oxygen demand. The metabolites formed after biotransformation was characterized by FT-IR and GC-MS analysis. The reactive blue 4 dye was found to be phytotoxic, cytotoxic and genotoxic whereas its biotransformed product were non-toxic. This study comprehensively illustrates that, bacterial aerobic granules can be used for eco-friendly remediation and detoxification of wastewater containing high organic load of anthraquinone dye.
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