Degradation and defluorination of 6:2 fluorotelomer sulfonamidoalkyl betaine and 6:2 fluorotelomer sulfonate by Gordonia sp. strain NB4-1Y under sulfur-limiting conditions
| Autor: | Eric M. Bottos, Jinxia Liu, Gabriel Munoz, Sung Vo Duy, Dayton M.J. Shaw, Jonathan D. Van Hamme, Sébastien Sauvé |
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| Rok vydání: | 2018 |
| Předmět: |
Alkanesulfonates
Environmental Engineering 010504 meteorology & atmospheric sciences chemistry.chemical_element 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Betaine Biotransformation Environmental Chemistry Fluorotelomer Gordonia Bacterium Waste Management and Disposal 0105 earth and related environmental sciences Fluorocarbons Metabolism Biodegradation Pollution Sulfur Sulfonate Biodegradation Environmental chemistry 13. Climate action Environmental chemistry FtsA Water Pollutants Chemical |
| Zdroj: | The Science of the total environment. 647 |
| ISSN: | 1879-1026 |
| Popis: | 6:2 fluorotelomer sulfonamidoalkyl betaine (6:2 FTAB) is a major component of aqueous film-forming foams (AFFFs) used for firefighting and is frequently detected, along with one of its suspected transformation products, 6:2 fluorotelomer sulfonate (6:2 FTSA), in terrestrial and aquatic ecosystems impacted by AFFF usage. Biochemical processes underlying bacterial biodegradation of these compounds remain poorly understood due to a lack of pure culture studies. Here, we characterized the water-soluble and volatile breakdown products of 6:2 FTSA and 6:2 FTAB produced using Gordonia sp. strain NB4-1Y cultures over seven days under sulfur-limited conditions. After 168 h, 99.9% of 60 μM 6:2 FTSA was degraded into ten major breakdown products, with a mol% recovery of 88.2, while 70.4% of 60 μM 6:2 FTAB was degraded into ten major breakdown products, with a mol% recovery of 84.7. NB4-1Y uses two pathways for 6:2 FTSA metabolism, with 55 mol% of breakdown products assigned to a major pathway and1.0 mol% assigned to a minor pathway. This work indicates that rapid transformation of 6:2 FTSA and 6:2 FTAB can be achieved under controlled conditions and improves the bacterial metabolism of these compounds. |
| Databáze: | OpenAIRE |
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