Numerical modeling of PFAS movement through the vadose zone: Influence of plant water uptake and soil organic carbon distribution

Barbara Jennifer Biesek; Adam Szymkiewicz; Jirka Simunek; Anna Gumuła-Kawęcka; Beata Jaworska-Szulc

doi:10.1016/j.scitotenv.2024.173252

Numerical modeling of PFAS movement through the vadose zone: Influence of plant water uptake and soil organic carbon distribution

Abstrakt

In this study, we investigated the effects of soil organic carbon (SOC) distribution and water uptake by plant roots on PFAS movement in the vadose zone with a deep groundwater table under temperate, humid climate conditions. Two series of numerical simulations were performed with the HYDRUS computer code, representing the leaching of historical PFOS contamination and the infiltration of water contaminated with PFOA, respectively. We considered soil profiles with three distributions of SOC (no SOC, realistic SOC distribution decreasing with depth, and uniform SOC equal to the content measured in topsoil), three root distributions (bare soil, grassland, and forest), and three soil textures (sand, sandy loam, and loam). The SOC distribution had a profound impact on the velocity of PFOS movement. The apparent retardation factor for realistic SOC distribution was twice as large as for the scenario with no SOC and more than three times smaller than for the scenario with uniformly high SOC content. We also showed that the root distribution in soil profoundly impacts the simulations of PFAS migration through soil. Including the root zone significantly slows down the movement of PFAS, primarily due to increased evapotranspiration and reduced downward water flux. Another effect of water uptake by plant roots is an increase of PFAS concentrations in soil water (evapo-concentration). The evapo-concentration and the slowdown of PFAS movement due to root water uptake are more significant in fine-textured soils than in sand.

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Autorzy (5)

Barbara Jennifer Biesek (dawniej: Barbara Biesek)
Adam Szymkiewicz prof. dr hab. inż.
Jirka Simunek Professor
Anna Gumuła-Kawęcka dr inż.
Beata Jaworska-Szulc dr hab. inż.

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Wersja publikacji: Accepted albo Published Version
DOI:: Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.scitotenv.2024.173252
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Kategoria:

Publikacja w czasopiśmie

Typ:

artykuły w czasopismach

Opublikowano w:

SCIENCE OF THE TOTAL ENVIRONMENT nr 935,
ISSN: 0048-9697

Język:

angielski

Rok wydania:

2024

Opis bibliograficzny:

Biesek B., Szymkiewicz A., Simunek J., Gumuła-Kawęcka A., Jaworska-Szulc B.: Numerical modeling of PFAS movement through the vadose zone: Influence of plant water uptake and soil organic carbon distribution// SCIENCE OF THE TOTAL ENVIRONMENT -, (2024), s.173252-

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