Rhamnolipid influences biosorption and biodegradation of phenanthrene by phenanthrene-degrading strain Pseudomonas sp. Ph6

Environmental Pollution
Zhao MaWanting Ling

Abstract

Given the sub-lethal risks of synthetic surfactants, rhamnolipid is a promising class of biosurfactants with the potential to promote the bioavailability of polycyclic aromatic hydrocarbons (PAHs), to provide a favorable substitute for synthetic surfactants. However, few previous studies have integrated the behavior and mechanism behind rhamnolipid-influenced PAH biosorption and biodegradation. This is, to our knowledge, the first report of a bacterial envelope regulated link between phenanthrene (PHE) biosorption and biodegradation by rhamnolipid-induced PHE-degrading strain Pseudomonas sp. Ph6. Rhamnolipid (0─400 mg L-1) can change the cell-surface zeta potential, cell surface hydrophobicity (CSH), cell ultra-microstructure and functional groups, and then alter PHE biosorption and biodegradation of Ph6. Greater amounts of PHE sorbed on cell envelopes results in more PHE diffusing into cytochylema, thus favoring PHE intracellular biodegradation of Ph6. Rhamnolipid (≤100 mg L-1) could change the microstructures and functional groups of cell envelopes of Ph6, enhance the cell-surface zeta potential and CSH, thus consequently favor PHE biosorption and biodegradation by strain Ph6. By contrast, rhamnolipid at higher concentrations...Continue Reading

Citations

Jun 6, 2020·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Zhaobo WangHuiwen Guo
Feb 23, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Łukasz ŁawniczakŁukasz Chrzanowski
Jul 1, 2020·Journal of the Air & Waste Management Association·Abiram Karanam RathankumarVinoth Kumar Vaidyanathan
Jun 13, 2021·Journal of Hazardous Materials·Piotr OfmanMaria Włodarczyk-Makuła
Aug 30, 2021·Molecular Microbiology·Fares SaïdiSalim T Islam

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