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Understanding PFAS movement in unsaturated soil: The impact of plant water uptake and soil organic carbon
Understanding PFAS movement in unsaturated soil: The impact of plant water uptake and soil organic carbon
A recent study by Biesek et al. provides new insights via numerical simulations into how the root zone of plants and the distribution of organic carbon in the soil affect PFAS movement. The study investigated the effects of soil organic carbon (SOC) distribution and water uptake by plant roots on PFAS movement in the vadose zone under temperate, humid climate conditions.
By applying the HYDRUS computer code to model the leaching of historical PFOS contamination and the infiltration of water contaminated with PFOA. The study considered various soil profiles with different SOC distributions, including no SOC, a realistic SOC distribution decreasing with depth, and a uniform SOC equal to the content measured in topsoil. Additionally, three root distributions (bare soil, grassland, and forest) and three soil textures (sand, sandy loam, and loam) were examined.
The study found that the way organic carbon is distributed in the soil affects how fast PFOS moves. When organic carbon is distributed realistically PFOS moves twice as slow compared to when there is no SOC and even three times as slow compared to uniformly high SOC content in. Furthermore, the root distribution in soil plays a significant role in PFAS migration. Including the root zone in the simulations showed that it 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 in PFAS concentrations in soil water, known as evapoconcentration. This evapoconcentration and the slowdown of PFAS movement due to root water uptake are more pronounced in fine-textured soils than in sand.
Want to learn more about how these findings can improve our understanding of PFAS movement through soil? Read the full article “Numerical modelling of PFAS movement through the vadose zone: Influence of plant water uptake and soil organic carbon distribution” by Biesek et al. for an in-depth analysis.
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Environmental contamination by veterinary antibiotics enhancing bacteria resistance requires urgent
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SOLACE – Understanding the links between SOiL pollution and CancEr
Soil pollution is a major environmental and health concern in Europe, with potential links to cancer. The SOLACE research project aimed to explore the complex relationships between soil properties, pollution, land use, and human health. This project, which is part of the Joint Research Centre's (JRC) strategic scientific development, provides a foundation for further research and policy development.
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Phosphate-enabled mechanochemical PFAS destruction for fluoride reuse
PFAS persistence in the environment has led to widespread contamination, affecting our drinking water, food, and air. PFAS removal from the environment remains a challenge. Current PFAS degradation methods include chemical- and photochemical-initiated oxidation and reductions processes, mechanical and base-assisted destruction and incineration, all of which produce fluorine waste. In this study, researchers developed a new technique to breakdown PFAS, whereby it not only breaks down these harmful chemicals but also recycles valuable fluorine, turning an environmental challenge into a sustainable solution.
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Farmers' health at risk from large cocktail of agricultural poisons
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Growing number of studies detect antibiotics, medicines and caffeine in groundwater
Issue 596 from the News Alert Service of the European Commission draws the attention to research showing that commonly used chemicals all enter the environment. Levels in groundwater across the world highlight the need to assess the risk posed by these substances.
