INVESTIGADORES
ALVAREZ Hector Manuel
artículos
Título:
Degradation of linear alkylbenzene sulfonate by a bacterial consortium isolated from the aquatic environment of Argentina
Autor/es:
PERESSUTTI SR,; OLIVERA NL; BABY PA; COSTAGLIOLA M; ALVAREZ HM
Revista:
JOURNAL OF APPLIED MICROBIOLOGY
Editorial:
Blackwell Publishing
Referencias:
Año: 2008 p. 1 - 9
ISSN:
1364-5072
Resumen:
Aims: To isolate and identify linear alkylbenzene sulfonate (LAS)-degrading
bacteria from Río de la Plata and adjacent waters, and to assay their degradation
capability as a consortium and as single organisms.
Methods and Results: A consortium consisting of four bacterial strains: Aeromonas
caviae (two strains), Pseudomonas alcaliphila and Vibrio sp. was identi-
fied by 16S rRNA analysis. Isolates grown as a consortium produced higher
biomass from LAS and CO2 release (mineralization) than individual cultures,
and degraded 86% of LAS (20 mg l)1), whereas pure strains degraded between
21% and 60%. Bacterial desulfonation from LAS was evidenced in the consortium
and A. caviae strains. A complete disappearance of LAS (10 mg l)1) was
accomplished, and LAS levels of 50 and 100 mg l)1 led to a pronounced
decrease in the biodegradation extent and inhibition of culture growth.
Conclusions: A bacterial consortium capable of complete LAS degradation was
isolated from the Río de la Plata and adjacent waters. This consortium was
more efficient for LAS degradation than individual cultures, and was sensitive
to high LAS concentrations.
Significance and Impact of the Study: The autochthonous consortium with
high effectiveness on LAS biodegradation is a useful tool for LAS depletion
from these polluted ecosystems.