Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 14, Pages 7139-7146Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.03.086
Keywords
Beta-cypermethrin; Pseudomonas aeruginosa; Isomerization; Degradation; Biosurfactant
Funding
- Hi-Tech Research and Development Program of China [2008AA10Z402]
- CAAS [0042009001, 0042011006]
Ask authors/readers for more resources
Pseudomonas aeruginosa CH7, isolated from activated sludge, was able not only to isomerize and degrade beta-cypermethrin but also to utilize it as the sole source of carbon and energy for growth and produce biosurfactant. The strain effectively degraded beta-cypermethrin with inocula biomass of 0.1-0.2 g L-1 at 25-35 degrees C, pH 6-9, and a final concentration of beta-cypermethrin 25-900 mg L-1. Via response surface methodology analysis, we found the optimal condition was 29.4 degrees C, pH 7.0, and inocula biomass of 0.15 g L-1; under these conditions, about 90% of the beta-cypermethrin could be degraded within 12 days. Noticeably, biosurfactant was detected in the MSM culture of strain CH7, suggesting that the biosurfactant (rhamnolipid) could potentially enhance the degradation of beta-cypermethrin by promoting the dissolution, adsorption, and absorption of the hydrophobic compounds. Therefore, CH7 may serve as a promising strain in the bioremediation of wastewater and soil polluted by beta-cypermethrin. (C) 2011 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available