PFAS contamination in tap water: Target and suspect screening of zwitterionic, cationic, and anionic species across Canada and beyond

Environment International, Год журнала: 2025, Номер 195, С. 109250 - 109250

Опубликована: Янв. 1, 2025

This study investigated the occurrence of perfluoroalkyl and polyfluoroalkyl substances (PFAS), including anionic, cationic, zwitterionic compounds, in drinking water. Between 2021-2023, an expanded list 76 target PFAS was screened tap water samples mainly from Canada, but also Eastern United States, Mexico, South America (Argentina), Caribbean (Dominican Republic, Cuba), Africa (Algeria, Cameroon, Central African Morocco, Rwanda, Tunisia), Europe (France, Greece, Italy, Spain, Kingdom) Asia (Japan, Vietnam, Iran, Türkiye). An additional ∼ 200 suspect-target were using high-resolution Orbitrap mass spectrometry. The results revealed widespread contamination most frequent perfluorobutane sulfonate (PFBS), perfluorooctane (PFOS), perfluorobutanoic acid (PFBA) with detection rates ≥ 79 %. Several not currently included EPA methods for region-specific trends. For instance, emerging 6:2 fluorotelomer sulfonamidopropyl betaine (6:2 FTAB) found at highest levels cities France, British Columbia (Canada), UK. FTAB likely reflects shifts PFOS-based aqueous film-forming foams (AFFF) past decades, possibly other uses. Short-chain sulfonamides (FBSA, FHxSA) globally recurrent. Bistriflimide, a counterion often used composition ionic liquids production lithium-ion batteries, detected 46 % samples. total linked to fluorochemical industries (surface water), AFFF use (groundwater), landfills (groundwater). database 275 x 153 provides valuable insights toward refining lists relevant be monitored

Язык: Английский

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Target and Suspect Screening Reveal PFAS Exceeding European Union Guideline in Various Water Sources South of Lyon, France

Environmental Science & Technology Letters, Год журнала: 2025, Номер 12(3), С. 327 - 333

Опубликована: Фев. 7, 2025

Lyon, a major hub for chemical industries in France, has been identified as contamination hotspot of per- and polyfluoroalkyl substances (PFAS). Major companies the Pierre-Bénite area have used PFAS production fluoropolymers fluorotelomers, with effluents discharged into Rhône River. This together other sources, such firefighting foam use at vicinal harbor oil depot, likely resulted complex signature. study investigated various water sources southern including ponds, rivers, factory channels, wells, springs, tap water. Out 47 samples, 22 had Σ77PFAS above 100 ng/L (maximum: ∼700 ng/L), 67% samples exceeded European guideline Σ20PFAS. Target profiles were dominated by perfluoroalkyl carboxylates (particularly C4 to C8), agreement their historical or current industrial usage. Suspect screening also revealed occurrence electrochemical fluorination precursors N-sulfopropyldimethylammoniopropyl perfluorohexanesulfonamido acetic acid (N-SPAmP-FHxSAA) bistriflimide (used composition ionic liquids). Certain ESI+ (e.g., 6:2 fluorotelomer sulfonamidopropyl betaine (6:2 FTAB)) ESI- FTS, FTSAS-sulfone) compounds, more prevalent surface than groundwater.

Язык: Английский

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Non-Targeted PFAS Suspect Screening and Quantification of Drinking Water Samples Collected through Community Engaged Research in North Carolina’s Cape Fear River Basin

Toxics, Год журнала: 2024, Номер 12(6), С. 403 - 403

Опубликована: Май 31, 2024

A community engaged research (CER) approach was used to provide an exposure assessment of poly- and perfluorinated (PFAS) compounds in North Carolina residential drinking water. Working concert with partners, who acted as liaisons local residents, samples were collected by residents from three different locations along the Cape Fear River basin: upper, middle, lower areas river. Residents either water their homes or recreational near residence that then submitted partners for PFAS analysis. All processed using weak anion exchange (WAX) solid phase extraction analyzed a non-targeted suspect screening well quantitative included panel 45 analytes, several which are specific chemical industries collection site locations. The approach, utilized list (obtained EPA CompTox database) identified at level two confidence rating (Schymanski scale); fluorinated insecticide, herbicide, polymer chemistry, another is battery production. Notably, locations, PFOA (39.8 ng/L) PFOS (205.3 levels exceeded mandatory maximum contaminant (MCL) 4 ng/L. Additionally, sites had detectable unique manufacturer. These findings communicated back disseminated this information help empower aid making decisions reducing exposure.

Язык: Английский

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HEAT STRESS IN LANDFILL ENVIRONMENTS: EVALUATING WORKER EXPOSURE AND OCCUPATIONAL RISKS

Case Studies in Chemical and Environmental Engineering, Год журнала: 2025, Номер unknown, С. 101097 - 101097

Опубликована: Янв. 1, 2025

Язык: Английский

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Unraveling the Exposure Spectrum of PFAS in Fluorochemical Occupational Workers: Structural Diversity, Temporal Trends, and Risk Prioritization

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Despite extensive poly/perfluoroalkyl substance (PFAS) discovery studies in various samples, the exposure spectrum fluorochemical occupational workers remains largely unexplored. Here, serum samples from 28 at a facility were analyzed using nontarget techniques, identifying 64 PFAS classes, including 15 novel ones such as pentafluorosulfur ether-substituted perfluoroalkyl sulfonic acids, hydrogen-substituted perfluoroalkylamines, and perfluoroalkylsulfonyl protocatechualdehyde esters. Temporal trend analyses (2008–2018) revealed stable levels for most but an increase perfluorobutanoic acid (PFBA) perfluorohexanesulfonic (PFHxS), suggesting industrial shifts long-chain to short-chain homologues China since early 2010s. Commonly reported structurally modified (e.g., hydrogen/carbonyl/chlorine substitution, ether insertion, unsaturation) likely historical byproducts of legacy production rather than intentionally manufactured alternatives. A Toxicological Priority Index-based risk assessment, integrating mobility, persistence, bioaccumulation indices, identified di(perfluoroakyl sulfonyl)imides, acids/carboxylic perfluoroalkylsulfonamidoacetic acids high-risk chemicals. Overall, exhibited higher mobility lower persistence PFAS, except chlorinated variants, which showed increased potential. This study highlights critical gaps historically emitted emphasizes need large-scale monitoring assessments manage emerging PFAS.

Язык: Английский

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Molecular docking–QSAR–Kronecker-regularized least squares-based multiple machine learning for assessment and prediction of PFAS–protein binding interactions

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138069 - 138069

Опубликована: Март 1, 2025

Язык: Английский

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Assessment of POPs in foods from western China: Machine learning insights into risk and contamination drivers

Environment International, Год журнала: 2025, Номер unknown, С. 109458 - 109458

Опубликована: Апрель 1, 2025

Persistent organic pollutants (POPs), including PCDD/Fs, PCBs, and PBDEs, are major environmental food safety concerns due to their bioaccumulative toxic properties. However, comprehensive research on the concentrations influencing factors of POPs across different types regions, particularly in underdeveloped regions western China, remains scarce. This study conducted a assessment contamination six (pig liver, pork, freshwater fish, marine beef, eggs) from China by integrating environmental, geographical, socio-economic data, POP with machine learning multivariate analyses evaluate distribution patterns, key factors, associated health risks. The results showed distinct patterns regions. Among all food, pig liver exhibited highest levels ∑PCDD/Fs, while fish elevated PBDEs ndl-PCBs, highlighting influence organ-specific bioaccumulation global oceanic pollution. Freshwater displayed higher ∑PCDD/Fs localized agricultural industrial Regional differences were most pronounced Yunnan Sichuan, driven emissions, biomass burning, geographical factors. Regression models, Random Forest SHAP analyses, identified type, latitude, GDP, climatic conditions as predictors variability. Risk assessments indicated that dietary exposure high-consumption foods remained within thresholds, posing no significant risks general population. highlights utility advanced analytical tools understanding dynamics emphasizes need for systematic monitoring, targeted interventions, enhanced regulations, China.

Язык: Английский

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Occurrence of per- and polyfluorinated substances, microplastics, pharmaceuticals and personal care products as emerging contaminants in landfill leachate: A review

Total environment engineering., Год журнала: 2025, Номер unknown, С. 100019 - 100019

Опубликована: Май 1, 2025

Язык: Английский

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Emerging and legacy per- and polyfluoroalkyl substances from offshore oilfields and receiving water in China

Environmental Research, Год журнала: 2025, Номер unknown, С. 121865 - 121865

Опубликована: Май 1, 2025

Язык: Английский

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Regulating the absorption and excretion of perfluorooctane sulfonate and its alternatives through influencing enterohepatic circulation

The Science of The Total Environment, Год журнала: 2024, Номер 933, С. 173161 - 173161

Опубликована: Май 10, 2024

Язык: Английский

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