6:2 fluorotelomer alcohol biotransformation in an aerobic river sediment system
Zhao, L; Folsom, PW; Wolstenholme, BW; Sun, H; Wang, N; Buck, RC
HERO ID
2325374
Reference Type
Journal Article
Year
2013
Language
English
PMID
| HERO ID | 2325374 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | 6:2 fluorotelomer alcohol biotransformation in an aerobic river sediment system |
| Authors | Zhao, L; Folsom, PW; Wolstenholme, BW; Sun, H; Wang, N; Buck, RC |
| Journal | Chemosphere |
| Volume | 90 |
| Issue | 2 |
| Page Numbers | 203-209 |
| Abstract | The 6:2 FTOH [F(CF(2))(6)CH(2)CH(2)OH] is a major raw material being used to replace 8:2 FTOH [F(CF(2))(8)CH(2)CH(2)OH] to make FTOH-based products for industrial and consumer applications. A novel aerobic sediment experimental system containing 20 g wet sediment and 30 mL aqueous solution was developed to study 6:2 FTOH biotransformation in river sediment. 6:2 FTOH was dosed into the sediment to follow its biotransformation and to analyze transformation products over 100 d. The primary 6:2 FTOH biotransformation in the aerobic sediment system was rapid (T(1/2)<2d). 5:3 acid [F(CF(2))(5)CH(2)CH(2)COOH] was observed as the predominant polyfluorinated acid on day 100 (22.4 mol%), higher than the sum of perfluoropentanoic acid (10.4 mol%), perfluorohexanoic acid (8.4 mol%), and perfluorobutanoic acid (1.5 mol%). Perfluoroheptanoic acid was not observed during 6:2 FTOH biotransformation. The 5:3 acid can be further degraded to 4:3 acid [F(CF(2))(4)CH(2)CH(2)COOH, 2.7 mol%]. This suggests that microbes in the river sediment selectively degraded 6:2 FTOH more toward 5:3 and 4:3 acids compared with soil. Most of the observed 5:3 acid formed bound residues with sediment organic components and can only be quantitatively recovered by post-treatment with NaOH and ENVI-Carb™ carbon. The 6:2 FTCA [F(CF(2))(6)CH(2)COOH], 6:2 FTUCA [F(CF(2))(5)CF=CHCOOH], 5:2 ketone [F(CF(2))(5)C(O)CH(3)], and 5:2 sFTOH [F(CF(2))(5)CH(OH)CH(3)] were major transient intermediates during 6:2 FTOH biotransformation in the sediment system. These results suggest that if 6:2 FTOH or 6:2 FTOH-based materials were released to the river or marine sediment, poly- and per-fluorinated carboxylates could be produced. |
| Doi | 10.1016/j.chemosphere.2012.06.035 |
| Pmid | 22840539 |
| Wosid | WOS:000312618300010 |
| Url | https://www.proquest.com/docview/1663551402?accountid=171501&bdid=107858&_bd=xsBAlEwWnC%2ByBEajYQA4XIR8aT8%3D |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Scopus URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84869876821&doi=10.1016%2fj.chemosphere.2012.06.035&partnerID=40&md5=92252c71430d991c43f5a149c08e6b22 |
| Is Public | Yes |
| Language Text | English |
| Keyword | Sediment; Biotransformation; 6:2 FTOH; 5:3 Polyfluorinated acid (5:3 acid); Polyfluorinated carboxylic acids; Perfluorinated carboxylic acids (PFCAs) |