Microbial reduction and precipitation of vanadium (V) in groundwater by immobilized mixed anaerobic culture.
Bioresour Technol
; 192: 410-7, 2015 Sep.
Article
em En
| MEDLINE
| ID: mdl-26067477
ABSTRACT
Vanadium is an important contaminant impacted by natural and industrial activities. Vanadium (V) reduction efficiency as high as 87.0% was achieved by employing immobilized mixed anaerobic sludge as inoculated seed within 12h operation, while V(IV) was the main reduction product which precipitated instantly. Increasing initial V(V) concentration resulted in the decrease of V(V) removal efficiency, while this index increased first and then decreased with the increase of initial COD concentration, pH and conductivity. High-throughput 16S rRNA gene pyrosequencing analysis indicated the decreased microbial diversity. V(V) reduction was realized through dissimilatory reduction process by significantly enhanced Lactococcus and Enterobacter with oxidation of lactic and acetic acids from fermentative microorganisms such as the enriched Paludibacter and the newly appeared Acetobacterium, Oscillibacter. This study is helpful to detect new functional species for V(V) reduction and constitutes a step ahead in developing in situ bioremediations of vanadium contamination.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
/
3_ND
Base de dados:
MEDLINE
Assunto principal:
Vanádio
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Poluentes Químicos da Água
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Água Subterrânea
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Purificação da Água
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Reatores Biológicos
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Consórcios Microbianos
Idioma:
En
Revista:
Bioresour Technol
Ano de publicação:
2015
Tipo de documento:
Article