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Article

Induction of Extracellular Hydroxyl Radicals Production in the White-Rot Fungus Pleurotus eryngii for Dyes Degradation: An Advanced Bio-oxidation Process

by
Ana Belén García-Martín
,
Juana Rodríguez
,
José Manuel Molina-Guijarro
,
Carmen Fajardo
,
Gabriela Domínguez
,
Manuel Hernández
and
Francisco Guillén
*
Department of Biomedicine and Biotechnology, Universidad de Alcalá, 28805 Alcalá de Henares, Spain
*
Author to whom correspondence should be addressed.
J. Fungi 2024, 10(1), 52; https://doi.org/10.3390/jof10010052
Submission received: 28 November 2023 / Revised: 26 December 2023 / Accepted: 3 January 2024 / Published: 7 January 2024
(This article belongs to the Special Issue Fungi Activity on Remediation of Polluted Environments)
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Abstract

Among pollution remediation technologies, advanced oxidation processes (AOPs) are genuinely efficient since they are based on the production of strong, non-selective oxidants, mainly hydroxyl radicals (·OH), by a set of physicochemical methods. The biological counterparts of AOPs, which may be referred to as advanced bio-oxidation processes (ABOPs), have begun to be investigated since the mechanisms of induction of ·OH production in fungi are known. To contribute to the development of ABOPs, advanced oxidation of a wide number of dyes by the white-rot fungus Pleurotus eryngii, via a quinone redox cycling (QRC) process based on Fenton’s reagent formation, has been described for the first time. The fungus was incubated with 2,6-dimethoxy-1,4-benzoquinone (DBQ) and Fe3+-oxalate, with and without Mn2+, leading to different ·OH production rates, around twice higher with Mn2+. Thanks to this process, the degradative capacity of the fungus increased, not only oxidising dyes it was not otherwise able to, but also increasing the decolorization rate of 20 dyes by more than 7 times in Mn2+ incubations. In terms of process efficacy, it is noteworthy that with Mn2+ the degradation of the dyes reached values of 90–100% in 2–4 h, which are like those described in some AOPs based on the Fenton reaction.
Keywords: Pleurotus eryngii; white-rot fungi; advanced bio-oxidation process (ABOP); quinone redox cycling; hydroxyl radicals; dyes degradation; advanced oxidation process (AOP) Pleurotus eryngii; white-rot fungi; advanced bio-oxidation process (ABOP); quinone redox cycling; hydroxyl radicals; dyes degradation; advanced oxidation process (AOP)

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MDPI and ACS Style

García-Martín, A.B.; Rodríguez, J.; Molina-Guijarro, J.M.; Fajardo, C.; Domínguez, G.; Hernández, M.; Guillén, F. Induction of Extracellular Hydroxyl Radicals Production in the White-Rot Fungus Pleurotus eryngii for Dyes Degradation: An Advanced Bio-oxidation Process. J. Fungi 2024, 10, 52. https://doi.org/10.3390/jof10010052

AMA Style

García-Martín AB, Rodríguez J, Molina-Guijarro JM, Fajardo C, Domínguez G, Hernández M, Guillén F. Induction of Extracellular Hydroxyl Radicals Production in the White-Rot Fungus Pleurotus eryngii for Dyes Degradation: An Advanced Bio-oxidation Process. Journal of Fungi. 2024; 10(1):52. https://doi.org/10.3390/jof10010052

Chicago/Turabian Style

García-Martín, Ana Belén, Juana Rodríguez, José Manuel Molina-Guijarro, Carmen Fajardo, Gabriela Domínguez, Manuel Hernández, and Francisco Guillén. 2024. "Induction of Extracellular Hydroxyl Radicals Production in the White-Rot Fungus Pleurotus eryngii for Dyes Degradation: An Advanced Bio-oxidation Process" Journal of Fungi 10, no. 1: 52. https://doi.org/10.3390/jof10010052

APA Style

García-Martín, A. B., Rodríguez, J., Molina-Guijarro, J. M., Fajardo, C., Domínguez, G., Hernández, M., & Guillén, F. (2024). Induction of Extracellular Hydroxyl Radicals Production in the White-Rot Fungus Pleurotus eryngii for Dyes Degradation: An Advanced Bio-oxidation Process. Journal of Fungi, 10(1), 52. https://doi.org/10.3390/jof10010052

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