Per- and polyfluoroalkyl substances (PFAS) in sediments collected from the Pensacola Bay System watershed.

Autor: Ahmadireskety A; Chemistry Department, University of Florida, Gainesville, Florida, USA., Da Silva BF; College of Veterinary Medicine, Department of Physiological Sciences, University of Florida, Gainesville, Florida, USA., Awkerman JA; Gulf Ecosystem Measurement & Modeling Division, US Environmental Protection Agency, Gulf Breeze, Florida, USA., Aufmuth J; George A. Smathers Libraries, University of Florida, Gainesville, Florida, USA., Yost RA; Chemistry Department, University of Florida, Gainesville, Florida, USA., Bowden JA; Chemistry Department, University of Florida, Gainesville, Florida, USA.; College of Veterinary Medicine, Department of Physiological Sciences, University of Florida, Gainesville, Florida, USA.
Jazyk: angličtina
Zdroj: Environmental advances [Environ Adv] 2021 Oct 01; Vol. 5, pp. 1-8.
DOI: 10.1016/j.envadv.2021.100088
Abstrakt: Sediment samples from 25 locations in the Pensacola Bay System (PBS) watershed were analyzed for the presence of 51 per- and polyfluoroalkyl substances (PFAS) using ultra high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) and selected reaction monitoring. Results revealed quantifiable concentrations of PFAS in all sampling locations. More specifically, perfluorobutanoic acid (PFBA) was present in every sediment sample with a minimum and maximum concentration of 0.04 to 0.48 ng g -1 dry weight, respectively, across the 25 sites with an average of 0.1 ± 0.09 ng g -1 . While PFOS, with an average of 0.11 ± 0.14 ng g -1 (range: -1 ) was the most abundant by concentration. LOQ of PFBA and PFOS were 0.01 ng g -1 and 0.1 ng g -1 , respectively. PBS 22 site had the highest concentration of total (ΣPFAS) PFAS with 3.89 ng g -1 and the third highest number of PFAS were detected in this location (23 out of 51 PFAS monitored). These results could be due to the proximity of this site to a paper manufacturing company. Site PBS 21, which is close to the Pensacola International Airport (PNS), had the second highest concentration of PFAS with 1.68 ng g -1 . Comparison between the ΣPFAS concentration present in sediments collected in July 2020 and sediments collected from nine repeat sites after Hurricane Sally (HS, September 2020), showed values, on average, 47% lower. These results highlight that the PBS area require further environmental monitoring and management of PFAS.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Databáze: MEDLINE
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