Surfactant mediated enhanced biodegradation of hexachlorocyclohexane (HCH) isomers by Sphingomonas sp. NM05

摘要: Environmental biodegradation of several chlorinated pesticides is limited by their low solubility and sorption to soil surfaces. To mitigate this problem we quantified the effect three biosurfactant viz., rhamnolipid, sophorolipid trehalose-containing lipid on dissolution, bioavailability, HCH-isomers in liquid culture contaminated soil. The biosurfactants was evaluated through critical micelle concentration (CMC) value as determined for each isomer. surfactant increased solubilization HCH isomers 3–9folds with rhamnolipid being more effective showing maximum at 40 μg/mL, compared peak 60 μg/mL. degradation Sphingomonas sp. NM05 surfactant-amended mineral salts medium showed 30% enhancement 2 days 10 days absence surfactant. HCH-spiked slurry incubated also around 30–50% enhanced which comparable corresponding batch experiments. Among surfactants, offered highest both culture. results study suggest effectiveness surfactants improving bioaccessibility.