John Stults

Model-Based Assessment of Adsorption and Diffusion of PFASs through Concrete as Continuous Source of PFASs to the Environment

John Stults, David Lutes, Jinxia Liu, Ian Ross

Per- and polyfluoroalkyl substances (PFASs) are persistent and pervasive contaminants of concern that are frequently introduced into the environment through aqueous film-forming foams (AFFF) on concrete pads. Previously published laboratory results of PFASs diffusion into Portland cement concrete are modeled using an …

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Bridging Science and Practice: Literature Review and Expert Insights on Per‐ and Polyfluoroalkyl Substances Transport Modeling

Mahsa Modiri Gharehveran, John Stults, David T. Adamson, Craig Divine et autres

ABSTRACT Per‐ and polyfluoroalkyl substances (PFAS) present significant challenges in modeling fate and transport within the subsurface, including both unsaturated and saturated zone, due to their amphiphilic nature, complex partitioning behavior, and partial transformation. Their transport within porous media is highly complex …

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Removal, Concentration, and Destruction of Per- and Polyfluoroalkyl Substances Using Foam Fractionation Coupled with Enhanced Contact Plasma

Dung Nguyen, John Stults, Stephen D. Richardson, Peter Murphy et autres

Per- and polyfluoroalkyl substances (PFAS) can occur in groundwater at elevated concentrations due to use in numerous commercial and industrial applications. Foam fractionation, which utilizes the surfactant properties of air–water interfacial adsorption and foaming to recover surfactants from the aqueous phase, has …

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

John Stults, Charles E. Schaefer, Tamzen W. Macbeth, Yida Fang et autres

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Practical limits of current technologies in removing per- and polyfluoroalkyl substances from fire suppression systems

Dung Nguyen, Christopher Bellona, Adria Lau, John Stults et autres

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Non-Fickian transport processes accelerate the movement of PFOS in unsaturated media: An experimental and modelling study

John Stults, Christopher P. Higgins, Tissa H. Illangasekare, Kamini Singha

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Air-water interfacial collapse and rate-limited solid desorption control Perfluoroalkyl acid leaching from the vadose zone

John Stults, Charles E. Schaefer, Yida Fang, Julie Devon et autres

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Recent Advancements in Mechanistic Understandings of PFAS Fate & Transport in the Vadose Zone

Christopher P. Higgins, Tissa H. Illangasekare, John Stults, Bo Guo

Background/Objectives: Per- and Polyfluoroalkyl substances (PFASs) are a group of highly recalcitrant, bioaccumulative, and toxic chemicals that are frequently introduced to groundwater through land surface exposure. As a result, the vadose zone has been identified as a significant long-term source zone for …

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Removal of per- and polyfluoroalkyl substances from wastewater via aerosol capture

Dung Nguyen, John Stults, Julie Devon, Eden Novak et autres

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Air-Water Interfacial Collapse and Dual Rate‑Limited Solid Desorption Control Perfluoroalkyl Acid Leaching from the Vadose Zone

John Stults, Charles E. Schaefer, Yida Fang, Julie Devon et autres

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Practical Limits of Current Technologies in Removing Per- and Polyfluoroalkyl Substances from Fire Suppression Systems

Dung Nguyen, Christopher Bellona, Adria Lau, John Stults et autres

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Integration of Per- and Polyfluoroalkyl Substance (PFAS) Fingerprints in Fish with Machine Learning for PFAS Source Tracking in Surface Water

John Stults, Christopher P. Higgins, Damian E. Helbling

Per- and polyfluoroalkyl substances (PFASs) are a class of environmental contaminants that originate from various sources. The unique chemical fingerprints associated with many commercial products and industrial applications make PFASs ideal candidates for machine learning (ML)-assisted environmental forensics. Here, we propose a …

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