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Exposure of Nanoplastics to Freeze-Thaw Leads to Aggregation and Reduced Transport in Model Groundwater Environments
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Exposure of nanoplastics to freeze-thaw leads to aggregation and reduced transport in model groundwater environments
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Polystyrene nanoplastics exposed to freeze-thaw cycles showed significantly greater aggregation and reduced transport through quartz sand columns compared to nanoplastics held at constant temperature, with effects most pronounced at higher ionic strength, suggesting cold climates limit nanoplastic mobility in subsurface environments.
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Researchers reviewed the pathways through which micro- and nanoplastics infiltrate underground aquifers and evaluated current and proposed strategies to protect these critical freshwater reserves, finding that soil filtration provides partial protection but that nanoplastics can bypass conventional barriers and persist in groundwater for extended periods.
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