Per- and polyfluoroalkyl substances - Wikipedia
WEBPer- and polyfluoroalkyl substances (PFAS [1] or PFASs [2]) are a group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain; there are 7 million such chemicals according to PubChem. [3]
WEBSep 8, 2021 — PFAS are a family of thousands of synthetic organic chemicals that contain a chain of carbon-fluorine bonds, one of the strongest chemical bonds. Many PFAS are highly stable, water- and oil-resistant, and exhibit other
Per- and polyfluoroalkyl substances (PFAS) - ECHA
WEBMar 13, 2024 — Some PFAS are described as long-chain or short-chain, but this does not cover all of the different kinds of structures that are present in the PFAS class, which is very diverse. PFASs can be sorted in many ways based on their structure.
WEBWhat are PFAS? A class of synthetic chemicals •Chains of carbon (C) atoms surrounded by fluorine (F) atoms − Water- and oil-repellent − Stable C-F bond •Some PFAS include oxygen, hydrogen, sulfur and/or nitrogen atoms, creating a water-soluble end Perfluorooctanoic acid (PFOA) Perfluorooctanesulfonic acid (PFOS) 2 Fluorine
PFAS Explained | US EPA - U.S. Environmental Protection Agency
WEBOct 25, 2023 — EPA's researchers and partners across the country are working hard to answer critical questions about PFAS: How to better and more efficiently detect and measure PFAS in our air, water, soil, and fish and wildlife; How much people are exposed to PFAS; How harmful PFAS are to people and the environment; How to remove PFAS from drinking water
Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)
WEBPFAS molecules have a chain of linked carbon and fluorine atoms. Because the carbon-fluorine bond is one of the strongest, these chemicals do not degrade easily in the environment. Table of Contents. Introduction. What Are PFAS?
Trends in the Regulation of Per- and Polyfluoroalkyl Substances …
WEBWhile long-chain PFAAs are a small proportion of the overall PFAS family, long-chain perfluoroalkyl carboxylic acids (PFCAs) and long-chain perfluoroalkyl sulfonic acids (PFSAs) are the focus of international, domestic, and local scientific study and regulation due to their adverse impacts on the environment and human health [1,9].
Elevated Levels of Ultrashort- and Short-Chain Perfluoroalkyl Acids …
WEBOct 11, 2023 — The results demonstrated that short-chain PFAS (C ≤ 8) were more prevalent in water, whereas long-chain PFAS (C > 8) were more detectable in sediments. The Las Vegas Wash water had much higher PFAS …
Revisiting the “forever chemicals”, PFOA and PFOS exposure
WEBAug 21, 2023 — Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), known as the most detected per- and polyfluoroalkyl substances (PFAS) in various environmental compartments, have been...
PFAS Molecules: A Major Concern for the Human Health and the ...
WEBJan 18, 2022 — Per- and polyfluoroalkyl substances (PFAS) are a group of over 4700 heterogeneous compounds with amphipathic properties and exceptional stability to chemical and thermal degradation.