-
Tytuł:
-
Sb(III)-resistance mechanisms of a novel bacterium from non-ferrous metal tailings.
-
Autorzy:
-
Gu J; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China.
Sunahara G; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China; Department of Natural Resource Sciences, McGill University, 21111 Lakeshore Drive, Ste-Anne-de-Bellevue, Quebec, H9X 3V9, Canada.
Duran R; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China; Equipe Environnement et Microbiologie, MELODY Group, Université de Pau et des Pays de l'Adour, E2S-UPPA, IPREM UMR CNRS 5254, BP 1155, 64013, Pau Cedex, France.
Yao J; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China. Electronic address: .
Cui Y; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China.
Tang C; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China.
Li H; Department of Basic Medicine, Hebei University, Baoding, 071002, People's Republic of China. Electronic address: .
Mihucz VG; Sino-Hungarian Joint Research Laboratory for Environmental Sciences and Health, ELTE-Eötvös Loránd University, H-1117 Budapest, Pázmány Péter stny. 1/A, Hungary.
-
Źródło:
-
Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2019 Dec 30; Vol. 186, pp. 109773. Date of Electronic Publication: 2019 Oct 12.
-
Typ publikacji:
-
Journal Article
-
Język:
-
English
-
Imprint Name(s):
-
Original Publication: Amsterdam, Netherlands : Elsevier
-
MeSH Terms:
-
Drug Resistance, Bacterial*
Mining*
Acinetobacter/*drug effects
Antimony/*analysis
Environmental Pollutants/*analysis
Acinetobacter/isolation & purification ; Adsorption ; Antimony/toxicity ; Biodegradation, Environmental ; China ; Environmental Pollutants/toxicity ; Kinetics ; Oxidation-Reduction
-
Contributed Indexing:
-
Keywords: Acinetobacter; Adsorption; Antimony; Oxidation; Toxicology
-
Substance Nomenclature:
-
0 (Environmental Pollutants)
9IT35J3UV3 (Antimony)
-
Entry Date(s):
-
Date Created: 20191016 Date Completed: 20200122 Latest Revision: 20200122
-
Update Code:
-
20240105
-
DOI:
-
10.1016/j.ecoenv.2019.109773
-
PMID:
-
31614300
-
Understanding the mechanism(s) of microbial resistance to antimony (Sb) is critical in the bioremediation of Sb polluted environments. Here a novel bacterium (Acinetobacter sp. JH7) isolated from mine tailings decreased the Microtox toxicity of a Sb(III)-containing medium. DNA sequencing and physiological testing were employed for the identification and characterization of strain JH7. Following a batch experiment, Fourier transform infrared spectroscopy (FTIR) and antimony speciation analyses determined the adsorption and oxidation of antimony. Analyses of Sb(III) distribution revealed that extracellular polymeric substances and cell walls inhibited Sb(III) entry into JH7 cells. FTIR studies indicated that key functional groups including -OH, C-N, and C-O likely participated in Sb(III) biosorption. Isothermal and kinetic studies revealed that Sb(III) sorption to viable JH7 cells fitted the Langmuir model (R 2 = 0.99) and could be described by pseudo-second order kinetics (R 2 = 0.99). Furthermore, the increase of anti-oxidative enzymatic activity of JH7 enhanced the intracellular detoxification of Sb(III), which would indirectly contribute to the Sb(III) resistance ability of strain JH7. Our results indicate that biosorption and ROS oxidation of Sb(III) were likely responsible for the decreased toxicity of Sb. The greater understanding how Acinetobacter sp. JH7 lowers the environmental Sb(III) toxicity could provide a basis for future research and subsequent development of technologies for the remediation of Sb contaminated sites.
(Copyright © 2019 Elsevier Inc. All rights reserved.)
