Resumo

SANCHEZ DIAZGRANADOS, JOSÉ GREGORIO  e  HENRY LOPEZ, CARLOS ANDRÉS. Degradation of Aldrin by Bacillus licheniformis, Isolated from Water and Sediment from the Ciénaga Grande, Santa Marta, Colombia. Acta biol.Colomb. [online]. 2012, vol.17, n.1, pp.67-76. ISSN 0120-548X.

The bacterium Bacillus licheniformis was isolated from sediment and water samples from estuary lagoon Cienaga Grande de Santa Marta (CGSM), Colombian Caribbean. The aim of the work was to use this microorganism as an alternative in the degradation of organic persistent pollutants. B. licheniformis was able to tolerate aerobic conditions and concentrations of the pesticide organochlorine, aldrin. The test was made during 30 days with 60 ng/L of aldrin in order to evaluate the degradation capacity of this bacterium. Identification and isolation of B. licheniformis was made through morphological (Gram test), as well as biochemical characterization (BBL Crystal system). Aldrin concentration was determined by gas chromatography. Results show that B. licheniformis had a degradation capacity of 24% from total concentration. Factors like solar light exposition and volatilization had an extra influence of 31% on aldrin degradation.

Palavras-chave : Bacillus licheniformis; aldrin; biodegradation.

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