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Crushed pet bottles as a support material in non-planted horizontal subsurface flow constructed wetlands: form of disposal in the bed, performance and potential for release of microplastics into sewage
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Researchers tested whether crushed PET plastic bottles could serve as support material in constructed wetlands for treating wastewater, while monitoring whether the plastic released additional microplastics into the treated water. The study explored both the utility of plastic waste in treatment systems and the risk of secondary microplastic pollution from the material.
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Horizontal subsurface flow constructed wetlands as tertiary treatment: Can they be an efficient barrier for microplastics pollution?
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Horizontal subsurface-flow constructed wetlands used as tertiary wastewater treatment removed 88% of microplastics from secondary effluent, contributing to an overall 98% reduction across the full treatment plant. Macroinvertebrates living in the wetland also ingested microplastics, suggesting biological uptake plays a role in plastic retention within the wetland ecosystem.
Distribution and fate of microplastics in a laboratory surface-flow constructed wetland
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Researchers tracked how different types of microplastics (polyethylene microbeads, rubber fragments, and plastic fibers) were distributed and retained in a laboratory-scale constructed wetland planted with aquatic macrophytes. The plants and substrate effectively trapped microplastics, suggesting constructed wetlands can provide additional removal of plastic particles beyond conventional wastewater treatment.
Microplastics profile in constructed wetlands: Distribution, retention and implications
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This study assessed microplastic distribution, retention, and implications within constructed wetlands used for wastewater treatment, finding that wetlands trap substantial quantities of MPs but that retention efficiency varies by plant species and wetland design. The results suggest constructed wetlands both remove and potentially accumulate MPs as a secondary pollution source.
Microplastic Identification in Domestic Wastewater-Treating Constructed Wetlands and Its Potential Usage in a Circular Economy
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Researchers identified and characterized microplastics in constructed wetlands used for treating domestic wastewater, finding MP accumulation in the substrate and plants and assessing how well these nature-based treatment systems retain plastic particles before effluent is discharged.
Floating Treatment Wetlands Made of HDPE and PET Can Be Sources of Microplastics
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This laboratory study tested whether floating treatment wetland (FTW) support systems made of high-density polyethylene (HDPE) and PET plastics release microplastics into treated water. Both HDPE and PET FTW materials shed measurable quantities of microplastics under simulated conditions, indicating that plastic-based stormwater treatment infrastructure can itself become a source of microplastic contamination.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.