Science Inventory

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Tens of thousands of foam-based fire suppression systems, such as firetrucks and hangars, might be contaminated by per- and polyfluoroalkyl substances (PFAS). Governmental policies surround the use of these substances in firefighting foams. This document provides overall technica...

Per- and polyfluoroalkyl substances (PFAS) are a class of man-made persistent chemicals that have been detected in both terrestrial and aquatic environments and thus impact humans, household pets, agricultural species, and wildlife. PFAS exposure is linked to a variety of adverse...

Diffusive gradients in thin-films (DGT) passive samplers were used to quantify aqueous phase concentrations (CDGT) of 32 per- and polyfluoroalkyl substances (PFAS) in laboratory-scale batch reactors.  Two-compartment diffusion cell tests interpreted with a non-steady-state f...

Stormwater runoff is a significant contributor of phosphorus (P) loading to waterbodies around the world. Green stormwater infrastructure (GSI) that uses filtration media, such as bioretention, can effectively retain suspended solids and associated particulate P, but is commonly ...

Per- and polyfluoroalkyl substances (PFAS) have been released into the environment for decades and are a concern for human and environmental health. PFAS are considered largely inert, but studies show that some PFAS can undergo chemical reactions that can impact their environment...

The decontamination of thousands of pipes in fire suppression systems, e.g., aircraft hangars and firetrucks exposed to Aqueous Film Forming Foam (AFFF) may generate large volumes of PFAS-laden water requiring treatment. Powdered activated carbon (PAC) is often implemented succes...

Per- and polyfluoroalkyl substances (PFAS) pose significant environmental and health risks, necessitating innovative removal strategies. This study investigates ovalbumin, a globular protein, as a potential bio-adsorbent candidate for PFAS removal from water. Specifically, we emp...

Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in both indoor and outdoor air, and there is increasing need to effectively screen this diverse class of chemicals for inhalation toxicity potential. Since PFAS have strong surface-active properties, we hypothesized they m...

Fluorotelomer alcohols (FTOHs) are a group of volatile and semi-volatile per- and polyfluoroalkyl substances (PFAS) commonly found in indoor air and contribute to PFAS inhalation exposure. Improving our understanding of the contribution of FTOHs to human exposure to PFAS indoors ...

In this mini-review article, the United States Environmental Protection Agency’s (EPA) PFAS Analytic Tools database was used to identify shipments of per- and polyfluoroalkyl substances (PFAS)-containing wastes from points of generation to points of treatment, disposal and ...

Per- and polyfluoroalkyl substances (PFASs) are synthetic chemicals used across numerous industrial and consumer applications. Their persistence and toxicological impacts necessitate their removal from the environment and their complete destruction; however, many PFAS destruction...

Per- and polyfluoroalkyl substances (PFAS) are highly water-, grease-, and heat-resistant compounds known as “forever chemicals” due to their resistance to degradation. Aqueous film-forming foams (AFFFs) are PFAS-containing firefighting foams and a known source of env...

To better understand natural organic matter (NOM) impacts on per- and polyfluoroalkyl substances (PFAS) removal in drinking water, this study investigated PFAS breakthrough from pilot-scale fixed-bed anion exchange columns fed a stable water quality influent with and without addi...

Two solutions containing ∼500 mg/L of perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) were atomized at two post-flame locations within a natural gas-fired pilot-scale combustor with peak temperatures of ∼860 °C and ∼750 °C. The thermal de...

Systematic evidence maps (SEMs) are increasingly used as a problem formulation tool to refine the focus of questions that get addressed in subsequent assessments and expedite assessment development {Thayer, 2022, 10476150}. SEMs can be defined as ¿A comprehensive summary o...

Perfluorohexane sulfonate (PFHxS) is a legacy, long-chain per- and polyfluoroalkyl substance (PFAS) frequently detected in human serum and environmental media across the globe. Previously published developmental studies in rats indicated a general lack of effects in common endpoi...

This research aims to use membrane distillation (MD) to treat problematic hypersaline per- and polyfluoroalkyl substances (PFAS)-laden waste streams. Results are shown for four commercially available membranes (unlaminated polytetrafluoroethylene (PTFE), polypropylene laminated P...

Resistance to chemotherapy is a major barrier to the effective treatment of ovarian cancer; however, the role of environmental exposures in the onset of chemoresistance remains elusive. Our previous work in ovarian cancer cells suggests that short-term perfluoroalkyl substances (...

Multiple solid phase extraction (SPE) methods in combination with liquid chromatography and high-resolution mass spectrometry were explored to help characterize the captured chemical space and improve interpretation of non-targeted results. Reference standards for 231 surrogate c...

This fact sheet gives background on leaching and materials testing and the initial development of the Leaching Environmental Assessment Framework methods and webpages. The fact sheet also provides information on current adaptation of the LEAF methods to  include both inorgan...

This peer-reviewed journal article will include the results of experiments performed at U.S. EPA and Markes International, Inc to develop a thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) analysis for the 30 volatile fluorinated compounds (VFCs) in other test m...

Widespread, persistent and toxic per- and polyfluoroalkyl substances (PFAS) pose a major threat to water systems and human health. Current detection methods are relatively expensive, slow and complex, underscoring the need for more accessible alternatives to meet increasingly str...

The complete destruction of per- and polyfluoroalkyl substances (PFAS) is important to help protect human health and the environment. Some PFAS have been found to be detrimental to human health and the environment, so it is vital to find technologies to treat stockpiles of high c...

Perfluorooctanoic acid (PFOA) and other per and polyfluorinated alkyl substances (PFAS) are emerging environmental contaminants of concern. Incineration is a common method of PFAS destruction and disposal, but due to the strength and stability of C–F chemical bonds, the pro...

Development of a batch stirrer device for determination of nitrate intraparticle mass transfer coefficients (Ds) on anion exchange resins. This study intends to provide a method for obtaining PFAS Ds values, which are critical inputs to treatment models.