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61,005 resultsShowing papers similar to Characterizing microplastics in urban runoff: A multi-land use assessment with a focus on 1–125 μm size particles
ClearStormwater 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.
Stormwater microplastic polymer types, particle sizes, and impact of techniques
Researchers characterised microplastic size distribution, morphology, and polymer profiles in urban stormwater runoff across multiple storm events and assessed how different subsampling techniques affect estimated microplastic concentrations and polymer diversity. The study found that subsampling methodology significantly influences results, highlighting the need for standardised approaches to accurately quantify stormwater as a microplastic pathway into aquatic ecosystems.
Urban stormwater microplastic size distribution and impact of subsampling on polymer diversity
Researchers examined how subsampling affects the characterization of microplastics in urban stormwater, finding that small subsamples can underestimate polymer diversity and that fibrous microplastics dominated across urban and suburban sites.
Microplastic emission characteristics of stormwater runoff in an urban area: Intra-event variability and influencing factors
Researchers found that stormwater runoff from both industrial and residential urban catchments contained substantial microplastics (54–639 particles per liter), with polypropylene and polyethylene dominating, and that microplastic concentrations peaked early in rain events following longer dry periods.
Microplastic emission characteristics of stormwater runoff in an urban area: Intra-event variability and influencing factors
Researchers investigated microplastic emission characteristics in urban stormwater runoff from industrial and residential catchments. Microplastics were detected in concentrations of 54 to 639 particles per liter, with polypropylene and polyethylene being the dominant polymers and fragments the most common shape, and concentrations were higher after longer dry periods.
Land use-based characterization and source apportionment of microplastics in urban storm runoffs in a tropical region
Urban stormwater runoff in a tropical monsoon region contained 4.7 particles/L and 3.8 mg/L microplastics on average, with concentrations following land use order of industrial > transportation > commercial > residential, and approximately 85% of sources identifiable by morphology and polymer type.
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.
Urban Stormwater Runoff: A Major Pathway for Anthropogenic Particles, Black Rubbery Fragments, and Other Types of Microplastics to Urban Receiving Waters
Researchers quantified microplastics in urban stormwater runoff from 12 watersheds surrounding San Francisco Bay and found concentrations ranging from 1.1 to 24.6 particles per liter, much higher than typical wastewater treatment plant effluent. The study suggests that stormwater runoff is a major and underappreciated pathway for microplastics and other anthropogenic particles to enter urban waterways.
Microplastics in urban stormwater sediments and runoff: An essential component in the microplastic cycle
This review systematically analyzed microplastic contamination in urban stormwater runoff and sediments, finding concentrations that varied enormously across global studies. Researchers found that stormwater is a major but underappreciated pathway for delivering microplastics to rivers, lakes, and oceans. The study highlights that better stormwater management practices are needed to reduce this significant source of aquatic microplastic pollution.
Microplastic Pollution in Stormwater: Preliminary Findings from the Oregon Coast
Researchers collected stormwater samples and analyzed them for microplastic content, providing preliminary findings on particle abundance, types, and size distributions in urban stormwater runoff. The results confirm stormwater as a significant pathway for microplastics from land surfaces into receiving water bodies.
Microplastic Presence, Aging, and Potential Sources in Urban Runoff in a Large Piedmont Metropolitan Area: Polymer-Type-Specific Analysis
Scientists found over 20,000 tiny plastic particles in rainwater runoff from a large metropolitan area, with the plastics coming from both local sources like degraded items on the ground and particles falling from the atmosphere. These microplastics can end up in our water supply and food chain, potentially affecting human health. The study helps identify where these harmful plastic particles come from in big cities, which is important for finding ways to reduce our exposure to them.
Microplastics in urban runoff: Global occurrence and fate
This review examines global microplastic occurrence in urban runoff, finding concentrations up to 8,580 particles per liter, and highlights critical gaps in understanding microplastic mobilization, transport, and flux from urban environments to waterways.
The urban microplastic footprint: investigating the distribution and transport
Researchers investigated the distribution and transport of microplastics within an urban environment, mapping the 'urban microplastic footprint' to understand how city infrastructure and land use patterns drive the spatial distribution and downstream export of plastic particles to receiving water bodies.
Stormwater microplastic polymer types, particle sizes, and impact of techniques
Researchers characterized microplastic size distribution, morphology, polymer composition, and loading in urban stormwater runoff across two sampling campaigns using different standardized methods (NOAA and ASTM protocols) with FTIR and FTIR-microscopy analysis. They found MP concentrations of 86 particles/L in the 63-250 µm size range and assessed how subsampling strategies affect estimated concentrations and polymer diversity in environmental samples.
Quantitative Analysis of Urban Microplastic Dissemination and Accumulation in Marine Ecosystems: Pathways, Processes, and Impacts
Researchers used water and sediment sampling across urban, riverine, and marine environments to quantify microplastic pathways from cities into marine ecosystems, finding the highest concentrations in urban areas linked to industrial activity and poor waste management. Polyethylene, polypropylene, and PET were the most common polymer types, with seasonal peaks in concentration tracking periods of high rainfall and urban runoff.
Qualitative and quantitative analysis of microplastics in runoff sediments and their correlation with land use and occupation in an urban area in the city of Bauru-SP
Researchers analysed the qualitative and quantitative distribution of microplastics in urban runoff sediments across different land use categories in Bauru, Sao Paulo, Brazil, including social housing, traditional residential, high-income residential, commercial, and industrial zones. Results indicated that microplastic abundance in transported sediments correlated with land use intensity, with more densely populated and active areas generating higher microplastic loads entering urban drainage networks.
Microplastics in urban water systems, Tehran Metropolitan, Iran
Researchers investigated microplastic contamination across Tehran's urban water systems, including runoff, drinking water, groundwater, rivers, and wastewater effluent. They found microplastics present in all parts of the system, with residential and commercial runoff showing the highest concentrations. The study revealed that different land use types influenced the amount and characteristics of microplastic pollution, suggesting that urbanization patterns play a significant role in water contamination.
Microplastic pollution in sediments of urban rainwater drainage system
Researchers found microplastics in all sediment samples from a university campus rainwater drainage system, with abundances ranging from 80 to 2,610 particles/kg and the highest concentrations in student living areas, suggesting that land use patterns and management practices influence microplastic accumulation in urban stormwater infrastructure.
Microplastic pollution in urban stormwater inlet sediments influenced by land use type of runoff drainage area
Researchers analyzed microplastic contamination in urban stormwater inlet sediments across different land use types in Ma'anshan City, China. They found microplastics present in all locations, with sediments near main roads showing the highest contamination at over 1,100 items per kilogram, roughly double that of other land use types. The study reveals that polypropylene was the dominant polymer across all areas, and that the characteristics of microplastic pollution vary systematically with surrounding land use patterns.
Analysis of Micropollutants in Urban Water Run-off
This study investigates the quality of urban stormwater runoff, focusing on concentrations of micropollutants including heavy metals and microplastics. The research evaluates how runoff from urban surfaces contaminates both groundwater and surface water, and assesses current stormwater management strategies in cities.
Abundance, Distribution and Drivers of Microplastic Contaminant in Urban River Environments
Researchers surveyed microplastic distribution in urban river environments and identified key drivers of accumulation hotspots, finding that land use, hydrology, and infrastructure factors concentrated microplastics at predictable locations that could inform targeted management interventions.
Microplastic contamination in urban aquatic environments: Occurrence characteristics in urban streams and stormwater runoff from urban surfaces
Researchers examined microplastic contamination in urban streams and stormwater runoff across different seasons and found that wastewater treatment plant discharges were a major source during dry weather. During rainy periods, stormwater runoff from roads and rooftops contributed additional microplastics, predominantly fibers and fragments. The study highlights that urban water systems receive microplastic pollution from multiple pathways year-round.
Contribution of different land use catchments on the microplastic pollution in detention basin sediments
Researchers measured microplastic pollution in detention basin sediments receiving runoff from catchments with different land uses — residential, commercial, and industrial — finding that industrial catchments contributed the highest microplastic loads. Particle morphology differed by land use type, with industrial sites associated with more fragments and commercial areas with more fibres.
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.