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Fate and biological uptake of polystyrene nanoparticles in freshwater wetland ecosystems
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Researchers studied the fate of polystyrene nanoparticles released into freshwater wetland ecosystems using controlled mesocosm experiments. They found that the wetlands effectively retained the nanoplastics, with most particles ending up in sediments while some were taken up by invertebrates and aquatic plants. The study suggests that wetlands may act as natural sinks for nanoplastic pollution, but that organisms within these ecosystems are exposed through biological uptake.
Wetland mesocosms retained nanoplastics. Nanoplastics where taken up by freshwater invertebrates and macrophytes and mainly ended up in the sediments of the water compartment.
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Researchers reviewed how microplastics enter, accumulate in, and damage natural wetlands — ecosystems that filter water and support biodiversity — finding that while wetlands may actually trap plastic particles like a sink, the resulting contamination poses serious ecological risks that are still poorly understood.
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Wetland ecosystems act as important sinks for micro- and nanoplastics, which were found to cause ecotoxicological effects on wetland plants, animals, and microbial communities, including shifts in microbial composition relevant to pollutant removal. Micro/nanoplastics exposure also affected conventional pollutant removal efficiency and greenhouse gas emissions from wetland systems.
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This review summarizes existing research on tiny human-made particles called nanomaterials, including nanoplastics, in constructed wetlands used to treat water. It finds these materials mainly build up in the soil and biofilm layer, often harming wetland organisms through stress and cell damage, which can affect water cleaning performance.
Micro- and nanoplastic pollution in wetland ecosystems: Ecological risks, health implications, and mitigation strategies toward a One Health future.
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This review paper summarizes existing research on tiny plastic particles, called micro- and nanoplastics, building up in wetlands. It explains how wetlands trap these particles, which can change over time, mix with other pollutants, and move through food chains, potentially affecting wildlife, livestock, and human health.
Effect of polystyrene micro/nanoplastics on PCBs removal in constructed wetlands planted with Myriophyllum aquaticum
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In constructed wetlands planted with Myriophyllum aquaticum, polystyrene micro- and nanoplastics of varying sizes did not significantly change overall PCB removal rates but altered the dynamics of PCB fate, raising concerns about combined contaminant interactions in wetland treatment systems.
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