Impact of per- and polyfluorinated alkyl substances (PFAS) on the marine environment: Raising awareness, challenges, legislation, and mitigation approaches under the One Health concept

Marine Pollution Bulletin, Год журнала: 2023, Номер 194, С. 115309 - 115309

Опубликована: Авг. 15, 2023

Per- and polyfluorinated alkyl substances (PFAS) have long been known for their detrimental effects on the ecosystems living organisms; however long-term impact marine environment is still insufficiently recognized. Based PFAS persistence bioaccumulation in complex food network, adverse will be exacerbated by global processes such as climate change synergies with other pollutants, like microplastics. The range of fluorochemicals currently included umbrella has significantly expanded due to updated OECD definition, raising new concerns about poorly understood dynamics negative ocean wildlife human health. Mitigation challenges approaches, including biodegradation studied materials environmental removal are proposed here, highlighting importance ongoing monitoring bridging research gaps. EU regulations, good practices legal frameworks discussed, emphasis recommendations improving ecosystem management.

Язык: Английский

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Occurrence of per- and polyfluoroalkyl substances in aquatic environments and their removal by advanced oxidation processes

Chemosphere, Год журнала: 2023, Номер 330, С. 138666 - 138666

Опубликована: Апрель 15, 2023

Язык: Английский

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Investigating the Electrochemically Driven Capture and Release of Long-Chain PFAS by Redox Metallopolymer Sorbents

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(18), С. 22112 - 22122

Опубликована: Апрель 28, 2023

The remediation of perfluoroalkyl substances (PFAS) is an urgent challenge due to their prevalence and persistence in the environment. Electrosorption a promising approach for wastewater treatment water purification, especially through use redox polymers control binding release target contaminants without additional external chemical inputs. However, design efficient electrosorbents PFAS faces significant balancing high adsorption capacity while maintaining electrochemical regeneration. To overcome this challenge, we investigate redox-active metallopolymers as versatile synthetic platform enhance both reversibility electrosorption uptake removal. We selected synthesized series bearing ferrocene cobaltocenium units spanning range potentials evaluate performance capture perfluorooctanoic acid (PFOA). Our results demonstrate that PFOA regeneration efficiency increased with more negative formal potential polymers, indicating possible structural correlations electron density metallocenes. Poly(2-(methacryloyloxy)ethyl cobaltoceniumcarboxylate hexafluorophosphate) (PMAECoPF6) showed highest affinity toward PFOA, than 90 mg PFOA/g adsorbent at 0.0 V vs Ag/AgCl 85% -0.4 Ag/AgCl. Kinetics bias greatly enhanced when compared open-circuit desorption. In addition, from different matrices salt concentrations demonstrated capability complex sources, even ppb levels contaminants. work showcases tunability PFAS.

Язык: Английский

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Application of Hydrothermal Alkaline Treatment to Spent Granular Activated Carbon: Destruction of Adsorbed PFASs and Adsorbent Regeneration

Environmental Science & Technology Letters, Год журнала: 2023, Номер 10(5), С. 425 - 430

Опубликована: Апрель 10, 2023

Granular activated carbon (GAC) adsorption is the most common technology applied to treat water contaminated with per- and polyfluoroalkyl substances (PFASs), but rapid exhaustion of media necessitates frequent replacement costly off-site thermal regeneration. Here, we extend application hydrothermal alkaline treatment (HALT), which uses strong alkali near-critical temperatures pressures (e.g., 350 °C, 16.5 MPa, 1 M NaOH) degrade mineralize PFASs, regeneration spent GAC. Mass balance experiments wherein a known mass perfluorooctanesulfonate (PFOS) was adsorbed onto GAC prior showed that HALT achieved >99% destruction PFOS 96 ± 4% defluorination no observed fluoro-organic intermediates [167 g L–1 GAC, NaOH, trxn = 400 min, 10–15 mg (g GAC)−1]. Treatment collected from field pilot study also effective range PFASs. Moreover, repeated cycles did not significantly affect specific surface area, similar isotherms for perfluoropentanoic acid were recorded virgin HALT-treated These findings suggest promising strategy on-site PFAS-contaminated other adsorbent may be an alternative practices.

Язык: Английский

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Life cycle assessment and life cycle cost analysis of anion exchange and granular activated carbon systems for remediation of groundwater contaminated by per- and polyfluoroalkyl substances (PFASs)

Water Research, Год журнала: 2023, Номер 243, С. 120324 - 120324

Опубликована: Июль 8, 2023

Язык: Английский

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Non-conventional sorption materials for the removal of legacy and emerging PFAS from water: A review

Emerging contaminants, Год журнала: 2024, Номер 10(3), С. 100303 - 100303

Опубликована: Фев. 8, 2024

and polyfluoroalkyl substances (PFAS) are a class of ubiquitous, persistent, hazardous pollutants that raise concerns for human health the environment. Typically, PFAS removal from water relies on adsorption techniques using conventional sorption materials like activated carbons (ACs) ion exchange resins (IERs). However, there is continuous search more efficient performing adsorbent to better address wide range chemical structures in environment, increase their selectivity, achieve an overall high capacity faster uptake kinetics. In this context, results application non-conventional (i.e., readily available biological-based proteins advanced nanocomposites cyclodextrins) reported discussed consideration following criteria: i) efficiency kinetics legacy (e.g., PFOA, PFBA) as well newly-introduced emerging GenX), ii) representativity environmental conditions experimental setup use environmentally relevant concentrations), iii) regenerability, reusability applicability materials, iv) role material modifications adsorption. From review, it emerged organic frameworks, nano(ligno)cellulosic-based layered double hydroxides among most promising herein investigated adsorption, was also observed presence fluorine- amine-moieties structure improve both selectivity uptake. lack data real environments costs involved means research still its infancy need further investigation.

Язык: Английский

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Enhancing the Thermal Mineralization of Perfluorooctanesulfonate on Granular Activated Carbon Using Alkali and Alkaline-Earth Metal Additives

Environmental Science & Technology, Год журнала: 2024, Номер 58(25), С. 11162 - 11174

Опубликована: Июнь 10, 2024

Thermal treatment has emerged as a promising approach for either the end-of-life or regeneration of granular activated carbon (GAC) contaminated with per- and polyfluoroalkyl substances (PFAS). However, its effectiveness been limited by requirement high temperatures, generation products incomplete destruction, necessity to scrub HF in flue gas. This study investigates use common alkali alkaline-earth metal additives enhance mineralization perfluorooctanesulfonate (PFOS) adsorbed onto GAC. When treated at 800 °C without an additive, only 49% PFOS was mineralized HF. All tested demonstrated improved mineralization, Ca(OH)2 had best performance, achieving efficiency 98% air N2. Its ability increase reaction rate shift byproduct selectivity suggests that role may be catalytic. Moreover, reduced gas instead reacting additive form inorganic fluorine (e.g., CaF2) starting waste material. A hypothesized mechanism is proposed involves electron transfer from O2– defect sites CaO intermediates formed during thermal decomposition PFOS. These findings advocate GAC disposal reuse, potential reduce operating costs mitigate environmental impact associated incinerating PFAS-laden wastes.

Язык: Английский

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Ecological risk of per- and polyfluorinated alkyl substances in the phytoremediation process: a case study for ecologically keystone species across two generations

The Science of The Total Environment, Год журнала: 2024, Номер 951, С. 174962 - 174962

Опубликована: Июль 26, 2024

Язык: Английский

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Evaluation of commercial nanofiltration and reverse osmosis membrane filtration to remove per‐and polyfluoroalkyl substances (PFAS): Effects of transmembrane pressures and water matrices

Water Environment Research, Год журнала: 2024, Номер 96(2)

Опубликована: Янв. 30, 2024

Abstract Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are now widely found in aquatic ecosystems, including sources of drinking water portable water, due to their increasing prevalence. Among different PFAS treatment or separation technologies, nanofiltration (NF) reverse osmosis (RO) both yield high rejection efficiencies (>95%) diverse water; however, technologies affected by many intrinsic extrinsic factors. This study evaluated the carbon chain length (e.g., PFOA PFBA) two commercial RO NF membranes under operational conditions applied pressure initial concentration) feed solution matrixes, such as pH (4–10), salinity (0‐ 1000‐mM NaCl), organic matters (0–10 mM). We further performed principal component analysis (PCA) demonstrate interrelationships molecular weight (213–499 g·mol −1 ), membrane characteristics (RO NF), matrices, on rejection. Our results confirmed that size exclusion is a primary mechanism NF, well fact electrostatic interactions important when molecules have sizes less than pores. Practitioner Points Two were remove 10 PFAS. High transmembrane pressures facilitated permeate recovery RO. Electrostatic repulsion pore dominant mechanisms for removal. pH, ionic strength, Mechanisms with RO/NF explained PCA analysis.

Язык: Английский

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Cutting-edge technologies and relevant reaction mechanism difference in treatment of long- and short-chain per- and polyfluoroalkyl substances: A review

Chemosphere, Год журнала: 2024, Номер 354, С. 141692 - 141692

Опубликована: Март 13, 2024

Язык: Английский

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