The environmental photolysis of perfluorooctanesulfonate, perfluorooctanoate, and related fluorochemicals
| Autor: | Eriko Yamazaki, Nobuyoshi Yamashita, Gert Petrick, Sachi Taniyasu, Kurunthachalam Kannan |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Air Pollutants
Fluorocarbons Fluorotelomer alcohol Photolysis Environmental Engineering Perfluorobutyric acid Health Toxicology and Mutagenesis Photodissociation Public Health Environmental and Occupational Health Perfluorobutane sulfonate General Medicine General Chemistry Pollution Hawaii chemistry.chemical_compound Japan chemistry Mauna kea Environmental chemistry Environmental Chemistry Fluorotelomer Photodegradation Long chain Environmental Monitoring |
| Zdroj: | Chemosphere. 90:1686-1692 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2012.09.065 |
| Popis: | A field study on the photolysis of perfluoroalkyl substances (PFASs) was conducted at high altitudes in Mt. Mauna Kea (Hawaii, USA; 4200 m) and Mt. Tateyama (Toyama, Japan; 2500 m). Results of photolysis of PFASs in the field were further confirmed in laboratory studies. Perfluorooctanesulfonate (PFOS), which is perceived as a non-degradable chemical in the environment, can undergo photolysis. Long chain PFASs can be successively dealkylated to short chain compounds such as perfluorobutyric acid (PFBA) and perfluorobutane sulfonate (PFBS), but the short chain compounds were relatively more resistant to photodegradation. These results suggest that environmental levels of short chain PFASs would increase both due to their formation from photolysis of long chain PFASs and from direct releases. Earlier studies on photolysis of PFASs were focused on the formation of perfluorocarboxylic acids (PFCAs) and perfluorosulfonic acids (PFSAs) from precursor compounds (such as fluorotelomer alcohols) under laboratory conditions. Our study suggests that PFSAs and PFCAs themselves can undergo photodegradation in the environment. |
| Databáze: | OpenAIRE |
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