Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye

In the process of biodegradation of azo dye, redox mediators (RMs) were found to significantly enhance the removal efficiency. In this work, biodegradable RMs deriving from lignin-based monomers were prepared via peroxidation to investigate whether similar chemicals present in lignin-rich streams fr...

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Autores principales:	Rong-ping Chen, Jia-li Cai, Qing Li, Lei Yu, Xin-yuan Wei, Cheng-hao Gan, Ru-xue Liu, Qiang Yong
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Redox mediators Lignin Extracellular electron transfers Biodegradation Azo dyes Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/84823bb57334436fb5e8cf7a5402b5b7
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spelling	oai:doaj.org-article:84823bb57334436fb5e8cf7a5402b5b72021-11-14T04:33:15ZEnhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye2238-785410.1016/j.jmrt.2021.10.114https://doaj.org/article/84823bb57334436fb5e8cf7a5402b5b72021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012503https://doaj.org/toc/2238-7854In the process of biodegradation of azo dye, redox mediators (RMs) were found to significantly enhance the removal efficiency. In this work, biodegradable RMs deriving from lignin-based monomers were prepared via peroxidation to investigate whether similar chemicals present in lignin-rich streams from biorefineries could be used for biological treatment of azo dyes. The as-prepared RMs were characterized by fourier transform infrared spectroscopy (FTIR), gas chromatography-mass spectrometer (GC–MS), cyclic voltammetry and electron paramagnetic resonance, and the degradation metabolites were analyzed by high performance liquid chromatography (HPLC). The induction of RMs accelerated the extracellular electron transfer, resulting efficient methyl orange (MO) decolorization. The decolorization efficiency of MO motivated by the products of vanillin peroxidation were increased from 20% to 95% in 12 h. Moreover, the products deriving from syringaldehyde peroxidation increased the efficiency from 40% to 85% in 24 h. The degradation results of the two RMs were well fitted by zero-order and first-order kinetic models. Under saline condition, the strain still remained a high and stable removal efficiency to MO in the presence of RMs, making it acceptable to be applied in the practical wastewater. The extracellular electron transfers and metabolic products were explored to unveil the mechanisms of enhancement. This study could provide a new route for the functional utilization of lignin-resource and a theoretical guidance for efficient biodegradation of azo dye wastewater.Rong-ping ChenJia-li CaiQing LiLei YuXin-yuan WeiCheng-hao GanRu-xue LiuQiang YongElsevierarticleRedox mediatorsLigninExtracellular electron transfersBiodegradationAzo dyesMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5265-5276 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Redox mediators Lignin Extracellular electron transfers Biodegradation Azo dyes Mining engineering. Metallurgy TN1-997
spellingShingle	Redox mediators Lignin Extracellular electron transfers Biodegradation Azo dyes Mining engineering. Metallurgy TN1-997 Rong-ping Chen Jia-li Cai Qing Li Lei Yu Xin-yuan Wei Cheng-hao Gan Ru-xue Liu Qiang Yong Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye
description	In the process of biodegradation of azo dye, redox mediators (RMs) were found to significantly enhance the removal efficiency. In this work, biodegradable RMs deriving from lignin-based monomers were prepared via peroxidation to investigate whether similar chemicals present in lignin-rich streams from biorefineries could be used for biological treatment of azo dyes. The as-prepared RMs were characterized by fourier transform infrared spectroscopy (FTIR), gas chromatography-mass spectrometer (GC–MS), cyclic voltammetry and electron paramagnetic resonance, and the degradation metabolites were analyzed by high performance liquid chromatography (HPLC). The induction of RMs accelerated the extracellular electron transfer, resulting efficient methyl orange (MO) decolorization. The decolorization efficiency of MO motivated by the products of vanillin peroxidation were increased from 20% to 95% in 12 h. Moreover, the products deriving from syringaldehyde peroxidation increased the efficiency from 40% to 85% in 24 h. The degradation results of the two RMs were well fitted by zero-order and first-order kinetic models. Under saline condition, the strain still remained a high and stable removal efficiency to MO in the presence of RMs, making it acceptable to be applied in the practical wastewater. The extracellular electron transfers and metabolic products were explored to unveil the mechanisms of enhancement. This study could provide a new route for the functional utilization of lignin-resource and a theoretical guidance for efficient biodegradation of azo dye wastewater.
format	article
author	Rong-ping Chen Jia-li Cai Qing Li Lei Yu Xin-yuan Wei Cheng-hao Gan Ru-xue Liu Qiang Yong
author_facet	Rong-ping Chen Jia-li Cai Qing Li Lei Yu Xin-yuan Wei Cheng-hao Gan Ru-xue Liu Qiang Yong
author_sort	Rong-ping Chen
title	Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye
title_short	Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye
title_full	Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye
title_fullStr	Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye
title_full_unstemmed	Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye
title_sort	enhancement on the microbial extracellular electron transfers by modified lignin materials: application on decolorization of azo dye
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/84823bb57334436fb5e8cf7a5402b5b7
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Enhancement on the microbial extracellular electron transfers by modified lignin materials: Application on decolorization of azo dye

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