Degradation of perfluorooctanyl sulfonate by strain Pseudomonas plecoglossicida 2.4-D

Resumo

A bacterial strain has been isolated from soil contaminated by waste from petrochemical production. Based on its cultural-morphological, physiological-biochemical properties and an analysis of the nucleotide sequence of the 16S rRNA gene and phylogenetic analysis data, the strain was defined as Pseudomonas plecoglossicida 2.4-D. The unique ability of this bacterium to use perfluorooctanyl sulfonate (PFOS) as the only source of carbon and energy is shown. When cultivated in a liquid medium, the strain completely utilizes this substance in 6 days. It is proved that P. plecoglossicida 2.4-D transforms PFOS to perfluoroheptanoic (perfluoroenanthic) acid, while free fluorine ions are released into the medium. Upon introduction into the soil, the strain was capable of PFOS degradation by 75%. The strain P. plecoglossicida 2.4-D is recommended for environmental protection. It can be used in the development of biotechnologies for the transformation (utilization) of fluoroorganic compounds.