Oxidation of Per- and Polyfluoroalkyl Ether Acids and Other Per- and Polyfluoroalkyl Substances by Sulfate and Hydroxyl Radicals: Kinetic Insights from Experiments and Models

Environmental Science & Technology, Год журнала: 2023, Номер 57(47), С. 18970 - 18980

Опубликована: Май 24, 2023

Per- and polyfluoroalkyl substances (PFAS) are widely used anthropogenic chemicals. Because of the strength carbon–fluorine bond, PFAS not destroyed in typical water treatment processes. Sulfate (SO4•–) hydroxyl (•OH) radicals can oxidize some PFAS, but behavior per- ether acids (PFEAs) processes involving SO4•– •OH is poorly understood. In this study, we determined second-order rate constants (k) describing oxidation 18 including 15 novel PFEAs, by •OH. Among studied 6:2 fluorotelomer sulfonate reacted most readily with [k•OH = (1.1–1.2) × 107 M–1 s–1], while containing an -O-CFH- moiety more slowly (0.5–1.0) 106 s–1]. presence SO4•–, rapidly [kSO4•– (0.89–4.6) s–1] than perfluoroalkyl carboxylic (PFECAs) a chloro-perfluoro-polyether acid (ClPFPECA) (0.85–9.5) 104 For homologous series acids, linear branched monoether PFECAs, multiether chain length had little impact on constants. headgroup PFECAs. contrast, for sulfonic moiety, site attack was moiety. Perfluoroalkyl were oxidized under conditions evaluated study.

Язык: Английский

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Analytical methodologies and occurrence of per- and polyfluorinated alkyl substances – A review

Journal of Chromatography Open, Год журнала: 2023, Номер 4, С. 100089 - 100089

Опубликована: Июль 1, 2023

Poly- and perfluoroalkyl substances (PFASs) are a family of compounds anthropogenic origin that, as result the strength C-F bonds, possess excellent physicochemical properties that make them chemically stable, resistant to degradation (even at high temperatures); characteristics which have led their use for wide range applications. Nonetheless, counterpart, PFASs innate resistance chemical, physical, and/or biological degradation, increases persistence in environment also leads entrance food matrices, up point they even been designated "forever chemicals". This review article pretends provide global vision current analytical methods determination techniques being used variety matrices (mainly, environmental, matrices), including occurrence, with special emphasis works published between 2018 2023. Furthermore, has made challenges well advancements sensor technologies made.

Язык: Английский

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A LC-MS/MS procedure for the analysis of 19 perfluoroalkyl substances in food fulfilling recent EU regulations requests

Talanta, Год журнала: 2023, Номер 266, С. 125054 - 125054

Опубликована: Авг. 8, 2023

Язык: Английский

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Removal of Per- and Polyfluoroalkyl substances by anion exchange resins: Scale-up of rapid small-scale column test data

Water Research, Год журнала: 2023, Номер 249, С. 120956 - 120956

Опубликована: Ноя. 30, 2023

Язык: Английский

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There’s Something in What We Eat: An Overview on the Extraction Techniques and Chromatographic Analysis for PFAS Identification in Agri-Food Products

Foods, Год журнала: 2024, Номер 13(7), С. 1085 - 1085

Опубликована: Апрель 1, 2024

Per- and polyfluorinated alkyl substances (PFASs) are a group of anthropogenic chemicals used in range industrial processes consumer products. Recently, their ubiquitous presence the environment as well toxicological effects humans have gained relevant attention. Although occurrence PFASs is widely investigated scientific community, standardization analytical method for all matrices still remains an important issue. In this review, we discussed extraction detection methods depth to evaluate best procedures PFAS identification terms parameters (e.g., limits (LODs), quantification (LOQs), recoveries). Extraction approaches based on liquid–liquid (LLE), alkaline digestion, solid phase (SPE), followed by liquid chromatography–mass spectrometry (LC-MS) gas (GC-MS) analysis main applied literature. The results showed detectable recoveries PFOA PFOS meat, milk, vegetables, eggs products (90.6–101.2% 89.2–98.4%), fish (96–108%). Furthermore, low LOD LOQ values obtained meat (0.00592–0.01907 ng g−1; 0.050 g−1), milk (0.003–0.009 0.010–0.027 fruit (0.002–0.009 0.006–0.024 (0.00369–0.017.33 0.05 g−1) also confirmed effectiveness recent quick, easy, cheap, effective, rugged, safe (QuEChERS) simple, speedy, sensitive ultra-trace analysis.

Язык: Английский

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An LC-MS/MS method for the quantitative determination of 57 per- and polyfluoroalkyl substances at ng/kg levels in different food matrices

Food Additives & Contaminants Part A, Год журнала: 2023, Номер 40(7), С. 862 - 877

Опубликована: Июль 3, 2023

To enable the monitoring of a wide scope per- and polyfluoroalkyl substances (PFAS) in ng/kg level foodstuffs, an LC-MS/MS method comprising 57 analytes was developed validated seven different matrices (milk powder, milk-based infant formula, meat-based baby food puree, fish oil, fresh egg, soluble coffee). The analytical approach based on acetonitrile:water extraction followed by solid phase clean-up with subsequent quantification extracted either isotope dilution (55 compounds) or standard addition (2 mass spectrometry. validation criteria guidance document for analysis PFAS issued European Union Reference Laboratory Halogenated Persistent Organic Pollutants. lowest limits (LOQs) four recently regulated compounds (L-PFOS, PFOA, PFNA, L-PFHxS) were set at 0.010 µg/kg foods (as sold) but also dairy ingredients. Exception PFOA milk powder due to too large variability repeatability. Applicability further demonstrated 37 commodity check matrices. Overall data robustness most LOQs achieved low enough ensure compliance Commission Regulation EU 2022/2388 support future collection occurrence food.

Язык: Английский

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Electrospun fluorinated carbon nanotubes/silk fibroin composite nanofibers for the analysis of perfluoroalkyl and polyfluoroalkyl substances

Journal of Hazardous Materials, Год журнала: 2023, Номер 448, С. 130955 - 130955

Опубликована: Фев. 7, 2023

Язык: Английский

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All-in-one strategy to construct bifunctional covalent triazine-based frameworks for simultaneous extraction of per- and polyfluoroalkyl substances and polychlorinated naphthalenes in foods

Journal of Hazardous Materials, Год журнала: 2023, Номер 465, С. 133084 - 133084

Опубликована: Ноя. 26, 2023

Язык: Английский

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Multiple-component covalent organic frameworks for simultaneous extraction and determination of multitarget pollutants in sea foods

Journal of Hazardous Materials, Год журнала: 2024, Номер 472, С. 134563 - 134563

Опубликована: Май 9, 2024

Язык: Английский

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Quantitative assessment of poly- and perfluoroalkyl substances (PFASs) in aqueous film forming foam (AFFF)–impacted soils: a comparison of analytical protocols

Analytical and Bioanalytical Chemistry, Год журнала: 2024, Номер 416(29), С. 6879 - 6892

Опубликована: Окт. 16, 2024

Язык: Английский

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