Add time:08/04/2019         Source:sciencedirect.com

Two halotolerant bacteria isolated from water samples of saltpan located at Ramanathapuram district, Tamil Nadu and tested their dye decolourization efficiency against four textile dyes. Of the tested strains, strain CMR2 showed maximum decolourization (98%) for Reactive Blue EFAF within 24 h. Further, strain CMR2 was identified as Exiguobacterium profundum using 16 s rDNA sequence analysis. It is noteworthy that the isolated halotolerant bacteria possess the ability to decolorize the reactive blue EFAF dye even in wide range of NaCl concentrations (5–30%) and pH (5–10). Decolourization efficiency was significantly increased upto 85% and 92% when the medium supplemented with starch and peptone as carbon and nitrogen source. Findings from UV–vis, FTIR spectral analysis before and after decolourization confirmed that the dye was decolourized completely via biodegradation. The present study suggest that Exiguobacterium profundum can be used as an effective candidate for the decolourization of waste water containing reactive blue EFAF.

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