Degradation of hexadecane by Pseudomonas aeruginosa with the mediation of surfactants: Relation between hexadecane solubilization and bioavailability

摘要: Abstract Degradation of hexadecane by Pseudomonas aeruginosa ATCC 9027 mediated with octylphenol ethoxylate (Triton X-100) or sodium dodecylbenzene sulfonate (SDBS) was studied to examine the relation between surfactant pseudo-solubilization and bioavailability for hydrophobic organic compounds (HOCs). For either surfactants, degradation in pseudo-solubilized form delayed compared as a separate phase, showing reduced availability hexadecane. When quantity significantly higher than pseudo-solubility used carbon source, Triton X-100 enhanced whereas SDBS still showed inhibitory effect. Degradability test shows that sole source could be partially degraded, not. These results indicate reduction HOC may occur surfactant-mediated bioremediation process, likely due barrier effect surfactants at water-HOC interface.