Effect of Humic Fractions and Clay on Biodegradation of Phenanthrene by a Pseudomonas fluorescens Strain Isolated from Soil
AUTOR(ES)
Ortega-Calvo, Jose-Julio
FONTE
American Society for Microbiology
RESUMO
The mineralization of phenanthrene in pure cultures of a Pseudomonas fluorescens strain, isolated from soil, was measured in the presence of soil humic fractions and montmorillonite. Humic acid and clay, either separately or in combination, shortened the acclimation phase. A higher mineralization rate was measured in treatments with humic acid at 100 μg/ml. Humic acid at 10 μg/ml stimulated the transformation only in the presence of 10 g of clay per liter. We suggest that sorption of phenanthrene to these soil components may result in a higher concentration of substrate in the vicinity of the bacterial cells and therefore may increase its bioavailability.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=106831Documentos Relacionados
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