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61,005 resultsShowing papers similar to Characteristics and fate of plastic pollution in urban stormwater ponds
ClearRetention of microplastics in sediments of urban and highway stormwater retention ponds
Stormwater retention ponds in both urban and highway settings were found to retain significant quantities of microplastics in their sediments, functioning as sinks that reduce downstream plastic loads during storm events. However, sediment disturbance during large storm events could remobilize accumulated plastics, limiting the long-term retention effectiveness.
Temporarily trapped: stormwater pond sediment is a key transient sink for microplastic debris
Stormwater ponds were found to temporarily trap microplastics in their sediments, but re-suspension events periodically release stored plastics back into waterways. This shows that stormwater infrastructure acts as a transient, not permanent, sink for microplastics and may contribute to downstream contamination.
Microplastics in a Stormwater Pond
Researchers analyzed microplastics in the water, sediments, and vertebrate fauna of a stormwater retention pond, finding widespread microplastic contamination across all compartments with the pond appearing to act as a sink that concentrates microplastics from urban runoff.
Retention of microplastics and tyre wear particles in stormwater ponds
Researchers analyzed stormwater retention ponds to assess their effectiveness at capturing microplastics and tire wear particles from urban runoff. They found microplastics in all water samples and significantly higher concentrations in pond sediments, suggesting that the ponds do retain a portion of these pollutants. The study indicates that while stormwater ponds offer some mitigation, their long-term performance for trapping emerging contaminants like microplastics needs further evaluation.
Comparative and temporal analysis of microplastic abundance and type in urban stormwater catchments
Urban stormwater ponds in Sydney, Australia were found to contain microplastics in every sample collected, with concentrations higher than those reported in comparable cities globally. Chlorinated polyethylene — a plastic used in construction materials and cables — was the most commonly identified polymer, and plastic fragments dominated over fibers. The study shows that urban stormwater infrastructure acts as a sink for microplastics, raising questions about the quality of water discharged from these systems into natural waterways.
Microplastics in urban and highway stormwater retention ponds
Microplastics were assessed in stormwater retention ponds across commercial, industrial, residential, and highway landscapes, finding that commercial and industrial areas released more microplastics than residential and highway areas, with PVC, PS, PP, PE, and polyester as dominant polymers. The study identifies land use type as a key predictor of stormwater microplastic loading.
Buoyant microplastics in freshwater sediments – How do they get there?
Microplastics were found to accumulate in the sediments of a stormwater treatment pond at average concentrations of 44,383 items per kg, with highly uneven spatial distribution reflecting hydrodynamic deposition patterns within the pond. The study provides insight into how stormwater infrastructure captures microplastics and what fraction may still pass through to receiving waters.
Microplastics pollution in urban freshwater sediments: A descriptive assessment of land-use categories
A study of stormwater retention ponds across different urban land uses in an unspecified city found that microplastic concentrations in pond sediments varied by land type, with levels linked to the surrounding activities such as residential, educational, and mixed-use development. Using Nile red fluorescence staining for identification, the research maps how urban stormwater systems accumulate microplastics and highlights these ponds as overlooked pollution hotspots. Understanding which land uses drive the most contamination can help target urban plastic management interventions.
Occurrence And Fate Of Microplastics In Urban Freshwater Systems
Microplastics were found in urban freshwater pond sediments at highly variable concentrations, with buoyant particles dominating by mass and water mixing playing a key role in distributing plastic particles through the water column.
Estimated discharge of microplastics via urban stormwater during individual rain events
Researchers collected stormwater samples from 15 locations during rain events to assess microplastic discharge through urban runoff. The study found highly variable microplastic concentrations influenced by catchment characteristics, and provided estimates of the quantity of microplastics released to receiving waters during rain events, highlighting urban stormwater as an important pathway for microplastic pollution.
Microplastic Emissions and Retention in Urban Catchments and Stormwater Ponds
Researchers quantified microplastic exports from five stormwater management ponds and their urban catchments in Ontario, Canada using Laser Direct Infrared spectroscopy, finding that ponds retain a substantial fraction of inflowing microplastics but that retention efficiency varies by particle shape and polymer type.
Plastic pollution risks in bioretention systems: a case study
Researchers investigated plastic pollution in urban stormwater bioretention systems and found these green infrastructure features both accumulate microplastics from road runoff and risk leaching plastic particles into groundwater, raising concerns about their role as pollution pathways.
The influence of flow on the amount, retention and loss of plastic pollution in an urban river
Researchers sampled both microplastics and macroplastics at four sites along an urban river in Ontario, Canada during normal flow and storm conditions. The study found that storm events significantly influence plastic transport dynamics, with flow conditions affecting how much plastic pollution is retained in or flushed through urban river systems toward downstream water bodies.
Urban tropical freshwater ponds as microplastics hotspots—insight on abundance and characteristics using an improved sampling technique
Researchers surveyed 20 urban freshwater ponds in central India and found microplastics present in all of them, with fragments, films, and foams being the most common types. They introduced an improved, low-cost sampling technique that does not require boats, making it practical for studying smaller water bodies. The results confirm that urban ponds are significant hotspots for microplastic accumulation, with polyethylene and polystyrene being the dominant polymer types.
Abundance, spatial distribution, and physical characteristics of microplastics in stormwater detention ponds
Microplastic distribution was investigated in two urban stormwater detention ponds, finding higher concentrations near pond inlets, decreasing fragment sizes from surface to subsurface soil layers, and more even vertical distribution in areas with dense grass root networks.
Microplastics retained in stormwater control measures: Where do they come from and where do they go?
Stormwater control measures were found to retain and accumulate microplastics from both episodic stormwater loading and continuous atmospheric deposition, raising concern that they may serve as long-term microplastic sources to groundwater through downward particle migration.
Stormwater runoff microplastics: Polymer types, particle size, and factors controlling loading rates
Researchers characterized microplastics in stormwater runoff samples collected at urban outfall locations. The study identified 17 different polymer types across various storm events, with concentrations around 0.99 particles per liter for the 500-1000 micrometer size range, and found that rainfall intensity and land use were key factors controlling microplastic loading rates.
Characterization of microplastics accumulated in sediments of stormwater detention basins, in relation to the land use patterns in the contributing catchment.
Microplastics in stormwater detention basin sediments were characterized and linked to surrounding land use, with roads and residential areas contributing the highest concentrations and most diverse plastic types.
Distribution and transport of microplastic and fine particulate organic matter in urban streams
Researchers found that urban streams both transport and retain microplastic and fine particulate organic matter, using particle transport dynamics methods to quantify retention rates and identify streams as significant intermediary sinks in the plastic pollution pathway to oceans.
Composition and concentrations of microplastics including tyre wear particles in stormwater retention pond sediments
Sediments from six stormwater retention facilities in [region unspecified] contained microplastics at 1,440–72,209 items/kg and tyre wear particles up to 69,300 µg/kg, with significantly higher concentrations at inlets than outlets, showing moderate but incomplete retention of these pollutants.
Design of model microplastics to study their transport in urban waters
Researchers designed model microplastic particles with controlled physical properties to systematically study their transport behavior in urban water systems. The work provides a foundation for understanding how microplastic size, density, and shape influence fate and transport in stormwater and urban drainage networks.
Abundance, composition and fluxes of plastic debris and other macrolitter in urban runoff in a suburban catchment of Greater Paris
Researchers quantified plastic debris composition and fluxes in stormwater runoff from a suburban Paris catchment, finding plastics comprised over 60% of macrolitter and estimating that separate sewer systems in the greater Paris area discharge 8–33 tons of plastic debris into the environment annually, establishing urban stormwater as a significant but poorly studied pathway for plastic pollution.
Change in microplastic concentration during various temporal events downstream of a combined sewage overflow and in an urban stormwater creek
Researchers examined how microplastic concentrations in urban waterways changed during rain events, snowmelt, and combined sewage overflow episodes, finding that stormwater runoff and sewer overflows substantially increase microplastic loads, with event type and intensity influencing concentration patterns.
Inter-storm variation in microplastic concentration and polymer type at stormwater outfalls and a bioretention basin
Microplastic concentrations, polymer types, and inter-storm variability were measured at two stormwater outfalls and a bioretention basin, finding that polymer fingerprints reflected local catchment materials and that concentrations varied substantially between storm events.