Abstract
An efficient diazo dye degrading bacterial strain, Bacillus sp. DMS2 was isolated from a long-term textile dye polluted environment. The strain was assessed for its innate ability to completely degrade and detoxify Direct Red 81 (DR81) textile dye under microaerophilic conditions. The degradation ability of strain showed significant results on optimizing the nutritional and environmental parameters. Based on statistical models, maximum efficiency of decolorization achieved within 24 h for 100 mg/l of dye supplemented with glucose (0.02%), MgSO4 (0.002%) and urea (0.5%) at 30°C and pH (7.0). Moreover, a significant catabolic induction of a laccase and azoreductase suggested its vital role in degrading DR81 into three distinct metabolites (intermediates) as by-products. Further, toxicity analysis of intermediates were performed using seeds of common edible plants, aquatic plant (phytotoxicity) and the nematode model (animal toxicity), which confirmed the non-toxic nature of intermediates. Thus, the inclusive study of DMS2 showed promising efficiency in bioremediation approach for treating industrial effluents.
Highlights
Azo dyes (R1-N=N-R2) are well known industrially synthesized organic compounds
The 16S rRNA gene homology study revealed that bacterial strain DMS2 was closely related to the Bacillus sp
Results, obtained in this study indicate that the bacterium Bacillus sp
Summary
Azo dyes (R1-N=N-R2) are well known industrially synthesized organic compounds. Textile and dyeing industries uses huge amount of water and such type of effluent contains about 10–40% of unused dyestuff which upon released into the environment causes serious pollution problem (Sahasrabudhe et al, 2014). Continuous disposal of such toxic dyestuff into the water bodies increases the organic load of natural reservoirs, which in turn leads to the negative impact on aquatic or terrestrial environments and its ecological functions (Saratale et al, 2015).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
