Demethylation and desulfonation of textile industry dye, Thiazole Yellow G by LAG.

Biotechnol Rep (Amst)

Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul, 04763, South Korea.

Published: September 2019

Filamentous fungi perform tremendously in adsorption of dyes from polluted environment. In this study, LAG decolorized thiazole yellow G dye within 5 days. Scale up studies done revealed that maximum decolorization (98%) was achieved at a concentration (10 mg L), temperature (35 °C) and pH 6. The fungus exhibited significant inductions in laccase (71%) and lignin peroxidase (48%) respectively. Spectrometric analysis (UV-vis, HPLC and gas chromatography-mass spectrometry) was used in analyzing the degraded products of the dye. The GCMS analysis revealed the production of two metabolites; sodium 6-methyl-2-phenyl-1,3-benzothiazole-7-sulfonate and 2-phenyl-4,5-dihydro-1,3-thiazole after degradation of thiazole yellow G dye. A metabolic pathway of thiazole yellow G dye degradation by was proposed. Significant growth in plumule and radicle couple with an attendant increase in germination further confirmed the detoxified status of the dye after degradation.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6451163PMC
http://dx.doi.org/10.1016/j.btre.2019.e00327DOI Listing

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