Cited by Metabolomic interpretation of bacterial and fungal contribution to per- and polyfluoroalkyl substances interface migration in waterlogged paddy fields

Effects of Physical and Chemical Aging of Colloidal Activated Carbon on the Adsorption of Per- and Polyfluoroalkyl Substances DOI

Jiang Liu, Xiaojue Chen, Grant R. Carey

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

Colloidal activated carbon (CAC) is an injectable adsorbent that sequesters per- and polyfluoroalkyl substances (PFAS) in the subsurface, serving as situ remediation technology for PFAS-impacted sites. However, effectiveness of CAC sorptive barrier could change over time due to alterations its physicochemical properties induced by aging processes. In this study, effects on surface resulting impact adsorption behaviors PFAS compounds were determined using four accelerated treatments, including wet-dry cycling (W/D), hydrogen peroxide (H), Fenton's reagent (F), mineral acid (A). treatments showed a greater physical structure chemical composition than either W/D-CAC H-CAC. Aging lowered specific area anion exchange capacity, increased oxygen content, point zero charge, suggesting negative impacts capacity removal. This reduction sorption was confirmed batch isotherm experiments. All aged had lower multisolute system, six with different chain lengths (C4-C8) functional groups (sulfonate or carboxylate), only exception being perfluorooctanesulfonic (PFOS). The results suggest process important, yet often overlooked, factor determining long-term removal, especially shorter-chain hydrophilic PFAS. More research needed verify influence field-scale processes performance longevity.

Language: Английский

Citations

Enhanced PFBS adsorption via silver-impregnated activated carbon: Mechanistic insights and Thermodynamic analysis DOI

Seyed Javad Amirfakhri,

Bruce J. Zobel,

Michael Karsten Lilla

et al.

Chemosphere, Journal Year: 2025, Volume and Issue: 375, P. 144257 - 144257

Published: March 3, 2025

Language: Английский

Citations

Review on the sources, distribution and treatment of per- and polyfluoroalkyl substances in global groundwater DOI

Hui Zhang,

Huichao Xu,

Bing Qin

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: 275, P. 121387 - 121387

Published: March 12, 2025

Language: Английский

Citations

Tool and Database for Estimating Potential Longevity of Colloidal Activated Carbon Barriers for PFAS in Groundwater DOI

Charles J. Newell, Wayne H. Smith,

Kade Kearney

et al.

Remediation Journal, Journal Year: 2025, Volume and Issue: 35(3)

Published: April 1, 2025

ABSTRACT This study presents a planning‐level graphical tool and regression equation model for estimating the longevity of Colloidal Activated Carbon (CAC) barriers treating per‐ polyfluoroalkyl substances (PFAS) in groundwater. The development incorporated information from field‐scale CAC barriers, including design data 17 sites performance monitoring results total 26 sites. consists both mathematical frameworks barrier based on site‐specific parameters, dimensions, groundwater Darcy velocity, loading, influent PFAS concentrations. Application to field yields longevities ranging 4 over 100,000 years, with median values 870, 150, 180 years PFOS, PFOA, PFHxS, respectively. wide variation is partly due significant variability mass flux entering as shown by five‐order‐of‐magnitude difference PFOA flux, × 10 −8 1 −3 kg m −2 year −1 . systematic decrease PFOS PFOA/PFHxS aligns known sorption behavior these compounds onto media. Key uncertainties estimation include spatial temporal CAC, hydrogeologic heterogeneity, isotherm selection, competitive effects, limited long‐term data. provides standardized approach preliminary using while emphasizing importance applying appropriate safety factors implementing strategies.

Language: Английский

Citations

Modeling the Influence of Coastal Site Characteristics on PFAS in Situ Remediation DOI

Grant R. Carey,

Anthony S. Danko,

Anh Le‐Tuan Pham

et al.

Ground Water, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

The potential performance of a hypothetical colloidal-activated carbon (CAC) in situ remedy for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic (PFOS) groundwater coastal zones was evaluated using estimated hydrogeologic geochemical parameters site the United States. With these parameters, reactive transport model (ISR-MT3DMS) used to assess effects tidal fluctuations near-shore geochemistry on CAC performance. average ionic strength 84 mM at conservatively result an increase adsorption PFOA by about 50% relative non-coastal sites with <10 mM. modeling also confirmed hypothesis that tidally induced flow reversals near shore would accumulation downgradient edge zone. Slow desorption from this boundary may sustain plume concentrations above strict cleanup criterion (e.g., USEPA MCL 0.004 μg/L), decades; however, there still large mass flux reduction (>99.9%) achieved after several decades shore. longevity substantially greater PFOS similar source concentration; higher distribution coefficient (K

Language: Английский

Citations

Carbon Adsorbent Properties Impact Hydrated Electron Activity and Perfluorocarboxylic Acid (PFCA) Destruction DOI

Hosea A. Santiago-Cruz, Zimo Lou, Jiang Xu

et al.

ACS ES&T Engineering, Journal Year: 2024, Volume and Issue: 4(9), P. 2220 - 2233

Published: Aug. 2, 2024

Carbon-based adsorbents used to remove recalcitrant water contaminants, including perfluoroalkyl substances (PFAS), are often regenerated using energy-intensive treatments that can form harmful byproducts. We explore mechanisms for sorbent regeneration hydrated electrons (e

Language: Английский

Citations

Competitive Adsorption of 4-Hydroxybenzaldehyde and Toluene onto High Silica Zeolites DOI

Tatiana Chenet, Maura Mancinelli, Elena Sarti

et al.

Environmental Processes, Journal Year: 2024, Volume and Issue: 11(3)

Published: Sept. 1, 2024

Abstract To evaluate the ability of zeolites to remove natural low molecular organic substances, p-hydroxybenzaldehyde (p-HBA), a phenolic compound derived from lignin, was chosen as representative naturally occurring dissolved substances. Two distinct high-silica zeolite materials, namely ZSM-5 and Y, were utilised for study, adsorption process investigated under wide range conditions. It has been observed that p-HBA is adsorbed by both zeolites, pH significantly impacts p-HBA, particularly within concentration range, while exerting minimal influence on saturation capacity. For various isotherm models assessed accurately describe data obtained aqueous solutions p-HBA. In addition, comprehend selectivity adsorbents towards substances xenobiotics, competitive mixtures toluene (TOL) investigated. The zeolite’s capacity diminishes with increasing contaminant concentration. Conversely, remains minimally affected it demonstrated can displace zeolites’ sites. This finding confirmed diffractometric study indicates TOL occupy “the same” Furthermore, Rietveld refinements reveal formation complexes interacting framework stabilising guest structures porosity. results are important selection proper adsorbent removal hydrocarbons in environmental application (natural waters).

Language: Английский

Citations

Latest trends in the environmental analysis of PFAS including nontarget analysis and EOF-, AOF-, and TOP-based methodologies DOI

Mujtaba Baqar, Hao Chen, Yiming Yao

et al.

Analytical and Bioanalytical Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 21, 2024

Language: Английский

Citations

Metabolomic interpretation of bacterial and fungal contribution to per- and polyfluoroalkyl substances interface migration in waterlogged paddy fields DOI

Jian-yi Wu,

Lingxuan Li,

Miao Chen

et al.

Environmental Pollution, Journal Year: 2024, Volume and Issue: unknown, P. 125580 - 125580

Published: Dec. 1, 2024

Language: Английский

Citations