The acceleration on decolorization of azo dyes by magnetic lignin-based materials via enhancing the extracellular electron transfer.
J Environ Manage
; 341: 118022, 2023 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-37150166
ABSTRACT
Two novel and eco-friendly redox mediators (RMs), magnetic oxidative vanillin (MOV) and magnetic oxidative syringaldehyde (MOS), both derived from lignin, were prepared to improve the decolorization of the methyl orange (MO) dye. The Decolorization Efficiency (DE) of MO in the batch experiments with MOV and MOS were increased by more than 60% and 22%, respectively, when compared to the control experiment without magnetic RMs. Moreover, the two magnetic RMs could maintain stable DE of MO in sequenced batch reactors (SBRs), and negligible leaching of the oxidized lignin monomers was observed under various environmental conditions. Density Function Theory (DFT) calculations were used to propose three potential biodegradation mechanisms for azo dyes, and the key intermediates were confirmed using high-performance liquid chromatography. This study proposed a feasible strategy for functional utilization of lignin resource, as well as a practical method for effectively treating azo dye-containing wastewater.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Corantes
/
Lignina
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article