Air Bubbling Assisted Soil Washing to Treat PFAS in High Organic Content Soils

Environments, Год журнала: 2025, Номер 12(1), С. 20 - 20

Опубликована: Янв. 12, 2025

The soil-washing technique has been successfully utilized for the remediation of PFAS-contaminated soils. Prior studies have shown that organic carbon (OC) content and grain size soil determined efficiency PFAS removal during washing. However, most past focused on soils with a low OC content, typically ranging from 0–3%. In this study, we explored use novel process where washing was combined air bubbling (or foam fractionation) to aid in high OC-content (~4–20%). Treatment (~20%) perfluorobutane sulfonate (PFBS) perfluorooctanoate (PFOA) did not enhance their removal, as they featured surface activity. observed an improvement extraction perfluorooctane (PFOS) 27% 42% bubbling, consistent higher activity PFOS compared PFOA PFBS. Perfluorodecanoic acid (PFDA) irreversibly adsorbed removed efficiently by both A slight PFDA (6–13%) when co-surfactant (cetyltrimethylammonium chloride) added reduced ~4% addition nonorganic sand contaminated prior This suggested interaction dominant factor determining its soil. conclusion, our results indicated alone sufficient short-chain Although had mild effect some long-chain solution, it help overall soils, highlighting difficulty treatment immobilization would be ideal approach managing such sites.

Язык: Английский

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Selective Quantification of Charged and Neutral Polyfluoroalkyl Substances Using the Total Oxidizable Precursor (TOP) Assay

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

Опубликована: Фев. 13, 2025

Perfluoroalkyl acid (PFAA) precursors are a diverse subclass of per- and polyfluoroalkyl substances (PFASs) that can be transformed into PFAAs public health concern. Unlike strongly acidic PFAAs, anionic, cationic, neutral, or zwitterionic. Precursor charge affects the environmental fate, but existing quantification techniques struggle to ascertain abundance compounds within each group. To fill this gap, we developed validated solid-phase extraction procedure separates by quantifies sum in fraction with total oxidizable precursor (TOP) assay. Method performance was demonstrated spiking known concentrations ten aqueous film-forming foam (AFFF)-impacted groundwater, municipal wastewater, soil samples. fractionation recovery were greater groundwater samples than wastewater. Use method provided results consistent expectations based on transport properties. In surficial soils near an AFFF source zone, anionic five fewer perfluorinated carbons accounted for about 95% PFASs, less half PFASs underlying groundwater. wastewater influent, exceeded approximately equally distributed among all fractions.

Язык: Английский

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Effect of coexisting Cd(Ⅱ) and As(V) on anionic PFASs sorption in soils: models and mechanisms

Environmental Pollution, Год журнала: 2025, Номер unknown, С. 125917 - 125917

Опубликована: Фев. 1, 2025

Язык: Английский

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Laboratory validation of a simplified model for estimating equilibrium PFAS mass leaching from unsaturated soils

The Science of The Total Environment, Год журнала: 2025, Номер 970, С. 179036 - 179036

Опубликована: Март 1, 2025

Язык: Английский

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Draft genomes of three bacteria capable of growing on cocamidopropyl betaine or N , N , N -trimethylglycine (betaine): Cupriavidus sp. CuC1, Variovorax sp. VaC1, and Pseudomonas sp. PsB

Microbiology Resource Announcements, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

ABSTRACT We report three draft genome sequences of Pseudomonas sp. PsB, Cupriavidus CuC1, and Variovorax VaC1. PsB can grow on N , -trimethylglycine (betaine), but not cocamidopropyl betaine (CPB), as a sole carbon source. CuC1 VaC1 only CPB.

Язык: Английский

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Implementation of Matrix-Matched Semiquantification of PFAS in AFFF-Contaminated Soil

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

Опубликована: Апрель 3, 2025

This study presents a novel semiquantification approach for nontarget screening (NTS), combining matrix-matched calibration and ionization class-specific average curves (ACCs) to address the lack of analytical reference standards most per- polyfluoroalkyl substances (PFAS). Ionization ACCs carboxylic sulfonic acids, sulfonamides, cationic PFAS result in high accuracy, with median absolute accuracy quotients below 2.27×. The was applied soil impacted by aqueous film-forming foam (AFFF) contamination. A total 96 tentatively identified were semiquantified addition 28 quantified compounds based on available standards. Semiquantified concentrations exceeded those target analytes, demonstrating critical role this method capturing broader In case, validation against extractable organofluorine (EOF) showed 102% closed mass balance. innovative not only enables comprehensive contamination assessment complex matrices but also expands scope NTS environmental monitoring, remediation, risk AFFF-contaminated sites.

Язык: Английский

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Extractable Organofluorine Mass Balance Analysis of Aqueous Film-Forming Foam-Impacted Soils: Sample Pretreatment and a Combination of Target Analysis and Suspect Screening

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

Опубликована: Апрель 7, 2025

The application of aqueous film-forming foams (AFFFs) has caused considerable per- and polyfluoroalkyl substances (PFAS) pollution in the environment. Soil serves as a long-term source PFAS for adjacent groundwater surface water, but lack extractable organofluorine (EOF) mass balance data AFFF-impacted soils may lead to an underestimation contamination. This study analyzed ten soil samples from three sites Sweden, using alkaline extraction followed by acidic extraction. fractions were subjected further cleanup separately target, suspect screening, EOF analysis evaluate efficiencies different reveal remaining unknown soils. Total target concentrations ranged 33.0 2.40 × 104 ng/g dry weight. Thirty-six identified screening. Considerable amounts zwitterionic cationic (up 58%) fraction, while >95% anionic found fraction. was conducted on first time. high proportion unexplained 65%) indicated necessity future investigation comprehensively understand their fate risk.

Язык: Английский

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Influence of continuous phase evolution of non-aqueous phase liquid on the retention and transport of coexistence perfluorooctanoic acid in saturated porous media

Journal of Hydrology, Год журнала: 2024, Номер 636, С. 131321 - 131321

Опубликована: Май 11, 2024

Язык: Английский

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A Multiple Lines of Evidence Approach to Demonstrate Effectiveness of PFAS Remediation Technologies

Groundwater Monitoring & Remediation, Год журнала: 2024, Номер 44(2), С. 30 - 38

Опубликована: Март 1, 2024

Abstract Significant investments have been made to develop treatment technologies, particularly destructive approaches, for a variety of per‐ and polyfluoroalkyl substances (PFAS) that are present in groundwater, surface water, other environmental media. A multiple lines evidence approach were developed assist regulators, funding agencies, practitioners evaluating PFAS technology performance. This article describes each three is effective: (1) decrease target concentrations observed; (2) transformation products identified quantified; (3) mechanism proposed consistent with previous studies supported by data. Other considerations also described inform conclusions about knowledge gaps priorities future testing. Collectively, these help communicate the complexities treatment, strengthen research plans, standardize evaluator reviews, realistic expectations technologies.

Язык: Английский

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The promotion of sustainable land use planning for the enhancement of ecosystem service capacity: Based on the FLUS-INVEST-RUSLE-CASA model

PLoS ONE, Год журнала: 2024, Номер 19(7), С. e0305400 - e0305400

Опубликована: Июль 9, 2024

Land Use/Land Cover (LULC) is one of the most significant human variables influencing efficiency Ecosystem Services (ESs) in terrestrial ecosystems. Theoretical and technical assistance for regional sustainable land use planning management, as well ecosystem conservation restoration, provided by investigating influence changes LULC pattern on ESs. This research focuses interactions between socioeconomic activities natural ecological processes Three Gorges Reservoir Area (TGRA). We data from TGRA years 1990, 2000, 2010, 2020. The study includes analysis calculation spatiotemporal evolution features current ESs, including their distribution. Considering TGRA’s national development orientation guidance, three potential patterns are constructed under various develop-ment scenarios. To calculate GeoSOS-FLUS future simulation model linked, several methodologies such INVEST, RUSLE, CASA used. goal to investigate ESs efficiency. findings show following: (1) From 1990 2020, values water services decreased subsequently increased. High-value areas primarily located reservoir’s centre eastern sections, whereas low-value mostly found western section. Soil service initially declined later climbed. carbon storage have in-creased yearly, 552.64 g/m 2 2000 615.92 (2) In protection scenario, soil erosion increased compared system benefits greater when scenario. (3) four positive spatial correlations across all scenarios, local au-tocorrelation demonstrate that storage, yield, habitat quality comparable distributions some extent, high-value conservation, retention, overlap.

Язык: Английский

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