Per- and polyfluoroalkyl substances (PFASs) in urban PM2.5 samples from Curitiba, Brazil

Atmospheric Environment, Journal Year: 2023, Volume and Issue: 309, P. 119911 - 119911

Published: June 17, 2023

Per- and polyfluoroalkyl substances (PFASs), also known as "forever chemicals" received significant attention during recent years due to their environmental persistence emerging evidence on toxicity humans. In this work we present the first measurements of PFASs in inhalable fraction airborne particles PM2.5 (particulate matter that has a diameter ≤2.5 μm) Brazil collected Covid restriction period. Three included perfluorooctanesulfonic acid (PFOS), restricted by Stockholm convention perfluorooctanoic (PFOA), 6:2 fluorotelomer sulfonate (6:2 FTS) were detected at concentrations up 0.3 pg/m3. These values do not include uncertainties associated with potential adsorption gas phase filters but may be lower than those generally occurring Curitiba, an abrupt reduction industrial activities major decrease use transport lockdown. Although current air quality regulations set limits for PFAS, there is concern these can accumulate human body. The detection FTS samples cause its atmosphere could have health effects comparable PFOA PFOS. Multiple pollution sources PFAS Curitiba considered based airmass trajectories wind roses. Our results raise question whether observed PFOS linked sulfluramid, pesticide permitted Brazil.

Language: Английский

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Characterizing the Movement of Per- and Polyfluoroalkyl Substances in an Avian Aquatic–Terrestrial Food Web

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(48), P. 20249 - 20260

Published: Nov. 24, 2023

The movement of per- and polyfluoroalkyl substances (PFAS) through linked aquatic-terrestrial food webs is not well understood. Tree swallows (Tachycineta bicolor) in such systems may be exposed to PFAS from multiple abiotic and/or biotic compartments. We show fatty acid signatures carbon stable isotopes that tree swallow nestlings southwestern Ontario fed on both terrestrial aquatic macroinvertebrates. profiles air, invertebrates, were dominated by perfluorooctanesulfonic (PFOS). Short-chain perfluoroalkyl acids (PFAAs) largely restricted surface water, sediment, long-chain PFAAs mainly found invertebrates swallows. PFOS, perfluorocarboxylic [perfluorononanoic (PFNA), perfluorodecanoic (PFDA), perfluorotridecanoic (PFTrDA)] perfluorooctane sulfonamide precursors estimated bioaccumulate air PFOS bioaccumulated PFDA, sulfonamidoacetic (FOSAAs) water invertebrates. showed biomagnification swallows, PFDA FOSAAs also biomagnified appears congener- compartment-specific, challenging the understanding exposure routes for species involved these webs.

Language: Английский

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Occurrence of a “forever chemical” in the atmosphere above pristine Amazon Forest

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 944, P. 173918 - 173918

Published: June 12, 2024

Per- and polyfluoroalkyl substances (PFAS), often referred to as "forever chemicals", are a class of man-made, extremely stable chemicals, which widely used in industrial commercial applications. Exposure some PFAS is now known be detrimental human health. By virtue long residence times, they detected the environment, including remote locations such Arctics, where origin poorly understood. It has been suggested that may transported through contaminated waters, leading accumulation coastal areas, can aerosolised via sea spray, thereby extending their geographical distribution far beyond original source regions. The aim this work investigate, for first time, whether chemicals" could areas considered pristine, from sites. This study was performed at Amazonian Tall Tower Observatory (ATTO), unique site situated middle Amazon rainforest, restricted PFAS, perfluorooctanoic acid (PFOA), observed with concentrations reaching up 2 pg/m3. A clear trend increasing concentration sampling height air masses south over Manaus had highest concentrations. Atmospheric lifetime estimations, removal mechanisms supported by measurements two heights (320 42 m above rainforest), spikes indicated long-range transport PFOA pristine rainforest. Potential sources, activities urban were explored, historical fire management practices considered. research presents atmosphere Remarkably, even natural appreciable levels detected. provides valuable insights into anthropogenic chemical" ecosystem should raise awareness potential environmental implications.

Language: Английский

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Considerations and challenges in support of science and communication of fish consumption advisories for per‐ and polyfluoroalkyl substances

Integrated Environmental Assessment and Management, Journal Year: 2024, Volume and Issue: unknown

Published: May 16, 2024

Federal, state, tribal, or local entities in the United States issue fish consumption advisories (FCAs) as guidance for safer of locally caught containing contaminants. Fish have been developed commonly detected compounds such mercury and polychlorinated biphenyls. The existing national does not specifically address unique challenges associated with bioaccumulation risk related to per- polyfluoroalkyl substances (PFAS). As a result, several states derived their own PFAS-related guidelines, many which focus on one frequently PFAS, known perfluorooctane sulfonic acid (PFOS). However, there can be significant variation between tissue concentrations trigger (TCs) PFOS that support individual state-issued FCAs. This TCs create assessors communicators efforts protect public health. objective this article is review challenges, knowledge gaps, needs issuing FCAs provide key considerations development protective guidance. current state science variability FCA derivation, sampling analytical methodologies, management, communication, policy are discussed. How best PFAS mixtures FCAs, assessment, establishment effect thresholds remains major challenge, well source uncertainty scrutiny. includes developments better elucidating toxicity factors, exposures mixtures, community behaviors, evolving technology instrumentation, methods, detection limits. Given interests informing continued revision approaches practices vital. Nonetheless, consistent, widely applicable, PFAS-specific critical concentration thresholds, priority may assist practitioners possibly reduce jurisdictions. Integr Environ Assess Manag 2024;20:1839-1858. © 2024 Author(s). Integrated Environmental Assessment Management published by Wiley Periodicals LLC behalf Society Toxicology & Chemistry (SETAC).

Language: Английский

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Chemical transformation, exposure assessment, and policy implications of fluorotelomer alcohol partitioning from consumer products to the indoor and outdoor environment—from production to end-of-life

Environmental Science Advances, Journal Year: 2024, Volume and Issue: 3(10), P. 1364 - 1384

Published: Jan. 1, 2024

Much is known about fluorotelomer alcohols (FTOHs) in consumer products and FTOHs release to the environment. This Perspective provides some understanding of environment throughout lifetime products.

Language: Английский

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PFAS in PMs might be the escalating hazard to the lung health

Nano Research, Journal Year: 2023, Volume and Issue: 16(12), P. 13113 - 13133

Published: Oct. 13, 2023

Language: Английский

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Determination of Perfluorinated and Polyfluorinated Alkyl Substances (PFASs) in PM10 Samples: Analytical Method, Seasonal Trends, and Implications for Urban Air Quality in the City of Terni (Central Italy)

Separations, Journal Year: 2024, Volume and Issue: 11(2), P. 42 - 42

Published: Jan. 28, 2024

A quantitative analytical method for PFAS determination in airborne particulate matter (PM) has been developed using liquid chromatography coupled with high-resolution mass spectrometry (LC-HRMS), allowing the of 33 compounds. The procedure was applied to ambient PM10 limits quantification fg m−3 range. samples collected during a year-long campaign conducted an urban site Umbria (Central Italy) have characterized their content. Among seven detected PFASs, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) were most abundant Furthermore, this work allowed us obtain first seasonal trend PFASs Central Italy. Seasonal analysis shows that concentration atmosphere peaks summertime. comparison trends other relevant primary secondary air pollutants determined at sampling suggests nature observed PFAS, which are formed directly from gaseous precursors can contribute worsen quality

Language: Английский

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HTAP3 Fires: Towards a multi-model, multi-pollutant study of fire impacts

Published: Aug. 28, 2024

Abstract. Open biomass burning has major impacts globally and regionally on atmospheric composition. Fire emissions include particulate matter, tropospheric ozone precursors, greenhouse gases, as well persistent organic pollutants, mercury other metals. frequency, intensity, duration, location are changing the climate warms, modelling these fires their is becoming more critical to inform adaptation mitigation, land management. Indeed, air pollution from can reverse progress made by emission controls industry transportation. At same time, nearly all aspects of fire – such emissions, plume injection height, long-range transport, chemistry highly uncertain. This paper outlines a multi-model, multi-pollutant, multi-regional study improve understanding uncertainties variability in science, models, fires’ impacts, addition providing quantitative estimates radiative burning. Coordinated under auspices Task Force Hemispheric Transport Air Pollution, international science communities working towards common goal improving global using this multi-model experiment provide for impact studies. research needs, opportunities, options fire-focused experiments provides guidance experiments, outputs, analysis that be pursued over next 3 5 years. It proposes plan delivering specific products at key points period meet important milestones relevant policy audiences.

Language: Английский

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Volatile methylsiloxanes of 141 personal care products in Korea: An adult exposure assessment

Environmental Research, Journal Year: 2024, Volume and Issue: unknown, P. 120633 - 120633

Published: Dec. 1, 2024

The widespread use of personal care products (PCPs) and subsequent exposure to their volatile methylsiloxane (VMS) content are often overlooked worldwide. Moreover, regulatory measures addressing VMS levels sparse, research on in PCPs is limited. Therefore this study, 141 from Korea, one the biggest PCP markets world, were extracted analyzed for seven VMSs using gas chromatography-mass spectrometry. Overall, cyclic (cVMS) compounds found at higher concentrations than linear (lVMS) compounds, accounting more 93% total concentration. highest was observed octamethylcyclotetrasiloxane (D4) hexamethylcyclotrisiloxane (D3), approximately 130,000 110,000 μg·g

Language: Английский

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Guide to per- and polyfluoroalkyl substances (PFAS) sampling within Natural Resource Damage Assessment and Restoration

Antarctica A Keystone in a Changing World, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

First posted February 8, 2024 For additional information, contact: Director, Columbia Environmental Research CenterU.S. Geological Survey4200 New Haven RoadColumbia, MO 65201Contact Pubs Warehouse Per- and polyfluoroalkyl substances (PFAS) are synthetic chemicals with a nondegradable fluorinated carbon backbone that have been incorporated in countless industrial commercial applications. Because PFAS nondegradable, they detected all environmental media, indicating extensive global contamination. The unique physiochemical properties of their complex interactions matrices create great challenge for researchers when selecting site-specific sample matrices, sampling logistics, various analytical methods, data interpretation. widespread contamination the potential toxicity to human health resulted proposed designation two commonly used as hazardous substances, which may prompt new requirements reporting, regulatory action, site cleanup. involved natural resource damage assessment efforts, understanding multifaceted dynamics fate transport will be essential appropriate collections, analyses, This guide aims provide fundamental concepts considerations during assessments.

Language: Английский

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