Effect and mechanism of cyclodextrins on nitrate reduction and bio-activity by S.oneidensis.MR-1.
Bio-activity
Cyclodextrin
EPS
Nitrate reduction
Journal
Bioresource technology
ISSN: 1873-2976
Titre abrégé: Bioresour Technol
Pays: England
ID NLM: 9889523
Informations de publication
Date de publication:
Dec 2020
Dec 2020
Historique:
received:
09
07
2020
revised:
07
08
2020
accepted:
08
08
2020
pubmed:
19
8
2020
medline:
9
10
2020
entrez:
19
8
2020
Statut:
ppublish
Résumé
Cyclodextrins (CDs) have been widely used due to the excellent solubilization of hydrophobic organics. However, their effect on the biotransformation process of hydrophilic pollutants is unclear. This study first evaluated the effect and mechanism of CDs on nitrate reduction by S.oneidensis.MR-1. The three CDs (α-CD, β-CD and γ-CD) all accelerated nitrate reduction, among which β-CD had the best effect. The nitrate reduction rate was increased by 21.8% with 0.5 mM β-CD. As for the mechanism, β-CD increased the biomass, membrane permeability and EPS of S.oneidensis.MR-1. The nitrate reductase activity was also increased by 1.34-fold with 0.5 mM β-CD. The current exchange density and the electron transfer system activity were increased by 11.4% and 99.5% in the β-CD-supply system, respectively. It confirmed that β-CD enhanced the biological and electrochemical characteristics and then enhanced bio-activity. This study provides a new understanding of CDs in microbial remediation and broadens the practical application.
Identifiants
pubmed: 32810732
pii: S0960-8524(20)31274-8
doi: 10.1016/j.biortech.2020.124002
pii:
doi:
Substances chimiques
Cyclodextrins
0
Nitrates
0
Nitrogen Oxides
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
124002Informations de copyright
Copyright © 2020 Elsevier Ltd. All rights reserved.