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Removal and Fate of Microplastics in Permeable Pavements: An Experimental Layer-by-Layer Analysis
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Pervious Concrete Pavement Permeability and Runoff Microplastics Mitigation—A Critical Review
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This review critically examines pervious concrete pavement as a strategy for capturing microplastics and tire wear particles from urban runoff, finding that bio-based adsorbents like biochar can improve removal efficiency, though replacing more than 6-7% binder weight reduces structural performance. Because road runoff is a major pathway for microplastics entering waterways, optimizing permeable pavement design offers a scalable infrastructure solution for pollution interception.
Removal and fate of microplastics in permeable pavements: An experimental layer-by-layer analysis
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Researchers tested permeable pavements as a way to capture microplastics from urban stormwater runoff and found they retained 89% to over 99% of microplastic particles. The microplastics accumulated mainly on the pavement surface and in geotextile filter layers, preventing them from reaching natural waterways. This type of sustainable urban drainage could be an effective tool for reducing the amount of microplastics that wash off roads and into the water sources people depend on.
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Researchers reviewed 45 studies on microplastic contamination in stormwater runoff published between 2020 and 2024, finding concentrations ranging from near zero to nearly 19,000 particles per liter, and recommending nature-based solutions such as bioretention cells, rain gardens, and constructed wetlands as cost-effective strategies for reducing urban microplastic discharge.
Microplastics in Urban Environments: Sources, Pathways, and Distribution
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Researchers mapped the major sources and pathways of microplastic pollution in cities, finding that tire wear, laundry wastewater, landfills, and construction activity collectively make urban areas major generators of the microplastics that flow into surrounding air, water, and soil.
Experimental study on transport processes of fragment microplastics during urban road rainfall runoff
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Tiny plastic fragments that accumulate on roads get swept into rivers and lakes when it rains, especially during heavy storms, on flatter roads, and when smaller fragments are involved, according to this study. This matters because these plastics eventually end up in the water bodies that supply our drinking water and support fish and wildlife, and understanding how rain washes them away can help cities design better filtering systems to catch them before they spread further into the environment.
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