A fundamental model for calculating interfacial adsorption of complex ionic and nonionic PFAS mixtures in the presence of mixed salts

Gao, Yi; Le, Song-Thao; Kibbey, Tohren C.G.; Glamore, William; O'Carroll, D. M.

doi:10.1039/d2em00466f

Cited by 2 publications

(1 citation statement)

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“…Additionally, the presence of electrolytes, counterions, biolms on the plastic surface, additives in plastics and mixed salts in natural seawater will impact the adsorptive behavior of surfactants and will likely alter the interactions between MPs and PFCAs. 35,65 Finally, it may be warranted to investigate the adsorption of PFCAs onto a particle surface at various point sources (i.e., AFFF impacted areas), that could contain per-uorinated surfactants at concentrations equal to or exceeding the critical micelle concentration (CMC). This is because at higher concentrations, surfactants have the ability to form distinct structures at solid-liquid interfaces, which may inuence the properties of the substrates.…”

Section: Conclusion and Perspectivementioning

confidence: 99%

Uptake and release of perfluoroalkyl carboxylic acids (PFCAs) from macro and microplastics

Brahana,

Al Harraq,

Saab

et al. 2023

Environ. Sci.: Processes Impacts

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Section: Conclusion and Perspectivementioning

confidence: 99%

Uptake and release of perfluoroalkyl carboxylic acids (PFCAs) from macro and microplastics

Brahana,

Al Harraq,

Saab

et al. 2023

Environ. Sci.: Processes Impacts

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Challenges and opportunities for porous media research to address PFAS groundwater contamination

Guo,

Brusseau

2024

InterPore J

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Per- and polyfluoroalkyl substances (PFAS) have become one of the most important contaminants due to their ubiquitous presence in the environment and potentially profound impacts on human health and the environment even at parts per trillion (ppt) concentration levels. A growing number of field investigations have revealed that soils act as PFAS reservoirs at many contaminated sites, with significant amounts of PFAS accumulating over several decades. Because PFAS accumulated in soils may migrate downward to contaminate groundwater resources, understanding the fate and transport of PFAS in soils is of paramount importance for characterizing, managing, and mitigating long-term groundwater contamination risks. Many PFAS are surfactants that adsorb at air–water and solid–water interfaces, which leads to complex transport behaviors of PFAS in soils. Concomitantly, PFAS present in porewater can modify surface tension and other interfacial properties, which in turn may impact variably saturated flow and PFAS transport. Furthermore, some PFAS are volatile (i.e., can migrate in the gas phase) and/or can transform under environmental conditions into persistent PFAS. These nonlinear and coupled processes are further complicated by complexities of the soil environment such as thin water films, spatial heterogeneity, and complex geochemical conditions. In this commentary, we present an overview of the current challenges in understanding the fate and transport of PFAS in the environment. Building upon that, we identify a few potential areas where porous media research may play an important role in addressing the problem of PFAS contamination in groundwater.

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A fundamental model for calculating interfacial adsorption of complex ionic and nonionic PFAS mixtures in the presence of mixed salts

Abstract: Per- and polyfluoroalkyl substances (PFAS) are emerging contaminants that have been used extensively as firefighting agents and in a wide range of commercial applications around the world. As many of...

Cited by 2 publications

References 25 publications

Uptake and release of perfluoroalkyl carboxylic acids (PFCAs) from macro and microplastics

Uptake and release of perfluoroalkyl carboxylic acids (PFCAs) from macro and microplastics

Challenges and opportunities for porous media research to address PFAS groundwater contamination

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