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. 2019 Mar 28:23:e00327.
doi: 10.1016/j.btre.2019.e00327. eCollection 2019 Sep.

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

Paul O Bankole  1   2 , Adedotun A Adekunle  3 , Sanjay P Govindwar  4
Affiliations

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

Paul O Bankole et al. Biotechnol Rep (Amst). .

Erratum in

Abstract

Filamentous fungi perform tremendously in adsorption of dyes from polluted environment. In this study, Aspergillus niger 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-1), 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 Aspergillus niger 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.

Keywords: Aspergillus niger; Biodegradation; Detoxification; Thiazole yellow G dye.

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Figures

Fig. 1
Fig. 1
Chemical structure of thiazole yellow G dye.
Fig. 2
Fig. 2
UV/Vis spectra of thiazole yellow G dye before and after treatment with Aspergillus niger.
Fig. 3
Fig. 3
Effect of pH on decolorization of thiazole yellow G dye by Aspergillus niger.
Fig. 4
Fig. 4
Effect of initial concentrations (mg L−1) on decolorization of thiazole yellow G dye by Aspergillus niger.
Fig. 5
Fig. 5
Effect of temperature (°C) on decolorization of thiazole yellow G dye by Aspergillus niger.
Fig. 6
Fig. 6
Proposed schematic pathway for degradation of thiazole yellow G dye by Aspergillus niger.
Fig. 7
Fig. 7
HPLC pattern of (a) thiazole yellow G dye before degradation, (b) metabolites obtained after degradation of thiazole yellow G dye by Aspergillus niger.
See this image and copyright information in PMC

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