Efficient decolorization of recalcitrant dyes at neutral/alkaline pH by a new bacterial laccase-mediator system
Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved..
Laccases and laccase-mediator systems (LMS) are versatile catalysts that can oxidize a broad range of substrates coupled to the sole reduction of dioxygen to water. They possess many biotechnological applications in paper, textile, and food industries, bioethanol production, organic synthesis, detection and degradation of pollutants, and biofuel cell development. In particular, bacterial laccases are getting relevance due to their activity in a wide range of pH and temperature and their robustness under harsh conditions. However, the enzyme and the redox mediator's availability and costs limit their large-scale commercial use. Here we demonstrate that β-(10-phenothiazyl)-propionic acid can be used as an efficient and low-cost redox mediator for decolorizing synthetic dyes by the recombinant laccase SilA from Streptomyces ipomoeae produced in E. coli. This new LMS can decolorize more than 80% indigo carmine and malachite green in 1 h at pH = 8.0 and 2 h in tap water (pH = 6.8). Furthermore, it decolorized more than 40% of anthraquinone dye remazol brilliant blue R and 80% of azo dye xylidine ponceau in 5 h at 50 °C, pH 8.0. It supported at least 3 decolorization cycles without losing activity, representing an attractive candidate for a cost-effective and environmentally friendly LMS functional at neutral to alkaline pH.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:217 |
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| Enthalten in: |
Ecotoxicology and environmental safety - 217(2021) vom: 01. Juli, Seite 112237 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Coria-Oriundo, Lucy L [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 21.05.2021 Date Revised 21.05.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.ecoenv.2021.112237 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM324459564 |
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| 520 | |a Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved. | ||
| 520 | |a Laccases and laccase-mediator systems (LMS) are versatile catalysts that can oxidize a broad range of substrates coupled to the sole reduction of dioxygen to water. They possess many biotechnological applications in paper, textile, and food industries, bioethanol production, organic synthesis, detection and degradation of pollutants, and biofuel cell development. In particular, bacterial laccases are getting relevance due to their activity in a wide range of pH and temperature and their robustness under harsh conditions. However, the enzyme and the redox mediator's availability and costs limit their large-scale commercial use. Here we demonstrate that β-(10-phenothiazyl)-propionic acid can be used as an efficient and low-cost redox mediator for decolorizing synthetic dyes by the recombinant laccase SilA from Streptomyces ipomoeae produced in E. coli. This new LMS can decolorize more than 80% indigo carmine and malachite green in 1 h at pH = 8.0 and 2 h in tap water (pH = 6.8). Furthermore, it decolorized more than 40% of anthraquinone dye remazol brilliant blue R and 80% of azo dye xylidine ponceau in 5 h at 50 °C, pH 8.0. It supported at least 3 decolorization cycles without losing activity, representing an attractive candidate for a cost-effective and environmentally friendly LMS functional at neutral to alkaline pH | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Bacillus subtilis CotA | |
| 650 | 4 | |a Dye decolorization | |
| 650 | 4 | |a Laccase | |
| 650 | 4 | |a Phenothiazine | |
| 650 | 4 | |a Streptomyces ipomoeae SilA | |
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| 650 | 7 | |a Azo Compounds |2 NLM | |
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| 650 | 7 | |a Indigo Carmine |2 NLM | |
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| 700 | 1 | |a Battaglini, Fernando |e verfasserin |4 aut | |
| 700 | 1 | |a Wirth, Sonia A |e verfasserin |4 aut | |
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