A New OECD Definition for Per- and Polyfluoroalkyl Substances

The report presents a revised, broadly inclusive PFAS definition: “PFASs are defined as fluorinated substances that contain at least one fully fluorinated methyl or methylene carbon atom (without any H/Cl/Br/I atom attached to it), i.e., with a few noted exceptions, any chemical with at least a perfluorinated methyl group (−CF3) or a perfluorinated methylene group…

Per- and polyfluoroalkyl substances (PFASs) in airborne particulate matter (PM2.0) emitted during floor waxing: A pilot study

This study examines PFAS emissions during professional floor stripping/waxing and their potential for occupational exposures. In total, ten PFASs were detected in PM2.0 collected during floor stripping/waxing. November 16, 2021 | Atmospheric Environment

Per- and polyfluoroalkyl substances, epigenetic age and DNA methylation: a cross-sectional study of firefighters

Per- and polyfluoroalkyl substances (PFASs) are persistent chemicals that firefighters encounter. Epigenetic modifications, including DNA methylation, could serve as PFASs toxicity biomarkers. With a sample size of 197 firefighters, the report quantified the serum concentrations of nine PFASs, blood leukocyte DNA methylation and epigenetic age indicators via the EPIC array. November 2, 2021 | Future…

Identification of point source dischargers of per- and polyfluoroalkyl substances in the United States

The report provides a screening-level analysis of the potential for environmental PFAS releases from contaminated sites, active industrial sites, wastewater treatment plants, and waste disposal sites (including active and inactive landfills) nationwide. November 2, 2021 | American Water Works Association Water Science

Concentration profiles of per- and polyfluoroalkyl substances in major sources to the environment

A review of published literature was conducted to present the concentrations and composition profiles of per- and polyfluoroalkyl substances (PFAS) from significant sources to the environment. The characteristic compounds and concentrations are summarized as found from direct sources such as manufacturing facilities, aqueous film-forming foam (AFFF) applications, metal coating operations, and textile and paper coating…