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

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

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