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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Field, Jim A. Luna-Velasco, Antonia Sierra-Alvarez, Reyes Ochoa-Herrera, Valeria |
| Copyright Year | 2016 |
| Abstract | Perfluorooctane sulfonate (PFOS) and related perfluoroalkyl and polyfluoroalkyl substances (PFASs) are emerging contaminants that have been widely applied in consumer and industrial applications for decades. However, PFOS has raised public concern due to its high bioaccumulative character, environmental persistence, and toxicity. Shorter PFASs such as perfluorobutane sulfonate (PFBS) and polyfluoroalkyl compounds have been proposed as alternatives to PFOS but it is unclear whether these fluorinated substances pose a risk for public health and the environment. The objective of this research was to investigate the microbial toxicity and the susceptibility to microbial degradation of PFOS and several related fluorinated compounds, i.e., short-chain perfluoroalkyl and polyfluoroalkyl sulfonic and carboxylic acids. None of the compounds tested were toxic to the methanogenic activity of anaerobic wastewater sludge even at very high concentrations (up to 500 mg L−1). All PFASs evaluated were highly resistant to microbial degradation. PFOS was not reductively dehalogenated by the anaerobic microbial consortium even after very long periods of incubation (3.4 years). Similarly, the tested short chain perfluoroalkyl substances (i.e., PFBS and trifluoroacetic acid) and a polyfluoroalkyl PFOS analogue, 6 : 2 fluorotelomer sulfonic acid (FTSA) were also resistant to anaerobic biodegradation. Likewise, no conclusive evidence of microbial degradation was observed under aerobic conditions for any of the short-chain perfluoroalkyl and polyfluoroalkyl carboxylic acids tested after 32 weeks of incubation. Collectively, these results indicate that PFOS and its alternatives such as short chain perfluoroalkyl sulfonates and carboxylates and their polyfluorinated homologues are highly resistant to microbial degradation. |
| Starting Page | 1236 |
| Ending Page | 1246 |
| Page Count | 11 |
| File Format | HTM / HTML PDF |
| ISSN | 20507887 |
| Volume Number | 18 |
| Issue Number | 9 |
| Journal | Environmental Science: Processes & Impacts |
| DOI | 10.1039/c6em00366d |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | PFOS Perfluorooctanesulfonic acid Bioaccumulation Persistent organic pollutant Wayne Shorter Perfluorobutane Public health Anaerobic organism Wastewater Microbial consortium Acid Fluorotelomer Biodegradation Aerobic organism |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law |
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