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Mutual interaction between the secreted flavins and immobilized quinone in anaerobic removal of high-polarity aromatic compounds containing nitrogen by Shewanella sp. RQs-106

Lu, Hong ; Zhou, Yang ; Fu, Ze ; Wang, Xiaolei ; Zhou, Jiti ; Guo, Wanqian

Journal of hazardous materials, 2022-06, Vol.431, p.128595-128595, Article 128595 [Periódico revisado por pares]

Netherlands: Elsevier B.V

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  • Título:
    Mutual interaction between the secreted flavins and immobilized quinone in anaerobic removal of high-polarity aromatic compounds containing nitrogen by Shewanella sp. RQs-106
  • Autor: Lu, Hong ; Zhou, Yang ; Fu, Ze ; Wang, Xiaolei ; Zhou, Jiti ; Guo, Wanqian
  • Assuntos: 3-nitrobenzenesulfonate ; Acid Red 18 ; Anaerobiosis ; Benzoquinones ; Flavins - metabolism ; Immobilized anthraquinone-2-sulfonate ; Nitrogen - metabolism ; Oxidation-Reduction ; Removal ; Shewanella - metabolism ; Shewanella sp. RQs-106
  • É parte de: Journal of hazardous materials, 2022-06, Vol.431, p.128595-128595, Article 128595
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: The immobilized anthraquinone-2-sulfonate (iAQS) could significantly promote anaerobic biotransformation of the contaminants. During this process, the role of flavins secreted by bacteria remains unclear. In the present study, mutual interaction between extracellular flavins and AQS-modified polyurethane foam (AQS-PUF) during the reduction of azo dye Acid Red 18 and 3-nitrobenzenesulfonate (3-NBS) was investigated. Results showed that the amount of extracellular flavins secreted by Shewanella sp. RQs-106 was positively correlated with the concentration of iAQS ranging from 10 to 100 μM. The presence of iAQS resulted in the increased concentration of extracellular and intracellular flavins, implying that iAQS could induce the synthesis and secretion of flavins. The deletion of gene bfe encoding the flavin adenine dinucleotide exporter resulted in approximately 63.8% decrease in the amount of extracellular flavins. Further analysis showed that the decreased amount of extracellular flavins could contribute to around 50.8% reduction of iAQS. Moreover, around 23.2% and 34.0% decreases were observed in AQS-PUF-mediated removal rates of AR 18 and 3-NBS by mutant lacking bfe gene, respectively, compared with that by wild type strain RQs-106. These results indicated that the secreted flavins played an important role in the bio-reduction of AQS-PUF, resulting in their contribution to AQS-PUF-mediated removals of high-polarity aromatic compounds containing nitrogen. [Display omitted] •Immobilized AQS (iAQS) could induce the synthesis and secretion of flavins.•Deletion of gene bfe resulted in 50.8% decrease in the bio-reduction rate of iAQS.•AQS-PUF-mediated removal rate of AR 18 decreased around 23.2% when lacking gene bfe.•Secreted flavins have a contribution to AQS-PUF-mediated reduction of 3-NBS.
  • Editor: Netherlands: Elsevier B.V
  • Idioma: Inglês
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