Characterization of the antimonite- and arsenite-oxidizing bacterium Bosea sp. AS-1 and its potential application in arsenic removal.
J Hazard Mater
; 359: 527-534, 2018 10 05.
Article
en En
| MEDLINE
| ID: mdl-30086523
ABSTRACT
Arsenic (As) and antinomy (Sb) usually coexist in natural environments where both of them pollute soils and water. Microorganisms that oxidize arsenite [As(III)] and tolerate Sb have great potential in As and Sb bioremediation, In this study, a Gram-negative bacterial strain, Bosea sp. AS-1, was isolated from a mine slag sample collected in Xikuangshan Sb mine in China. AS-1 could tolerate 120 mM of As(III) and 50 mM of antimonite [Sb(III)]. It could also oxidize 2 mM of As(III) or Sb(III) completely under heterotrophic and aerobic conditions. Interestingly, strain AS-1 preferred to oxidize As(III) with yeast extract as the carbon source, whereas Sb(III) oxidation was favored with lactate in the medium. Genomic analysis of AS-1 confirmed the presence of several gene islands for As resistance and oxidation. Notably, a system of AS-1 and goethite was found to be able to remove 99% of the As with the initial concentration of 500 µg/L As(III) and 500 µg/L Sb(III), which suggests the potential of this approach for As removal in environments especially with the presence of high Sb.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Arsenitos
/
Bradyrhizobiaceae
/
Contaminantes Ambientales
/
Antimonio
Idioma:
En
Revista:
J Hazard Mater
Asunto de la revista:
SAUDE AMBIENTAL
Año:
2018
Tipo del documento:
Article