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61,005 resultsShowing papers similar to Contributing to the assessment of the impact of urban activities on microplastic transport through air and runoff infiltration
ClearMicroplastics in urban catchments: Review of sources, pathways, and entry into stormwater
This review examines microplastic sources, transport pathways, and entry mechanisms into urban stormwater systems, identifying atmospheric deposition, tire and road wear particles, and micro-litter as major contributors and highlighting the need for improved source control strategies.
Relevance of tyre wear particles to the total content of microplastics transported by runoff in a high-imperviousness and intense vehicle traffic urban area.
Researchers characterized microplastics and tire wear particles (TWPs) transported by urban stormwater runoff in a highly impervious catchment, finding that TWPs made up a substantial fraction of the total microplastic load in sediments of a stormwater detention reservoir. The study underscores the contribution of road traffic to microplastic pollution entering waterways.
Is road pavement wear a source of microplastics in stormwater runoff?
This study investigated whether road pavement wear is a measurable source of microplastics in stormwater runoff, distinct from the better-characterized tire wear contribution. Pavement-derived particles were identified in stormwater samples, confirming that road surface material itself contributes to microplastic loading in urban runoff alongside tire wear and other sources.
Microplastics and tyre wear particles in urban runoff from different urban surfaces
Researchers measured microplastics and tire wear particles in stormwater runoff from roads, parking lots, and rooftops in Sweden. They found that road runoff carried the highest concentrations by far, with large variations between rainfall events. The findings highlight urban roads as a major source of microplastic pollution entering nearby waterways through stormwater.
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.
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 atmospheric microplastics deposition contributes to microplastic pollution in urban waters
Researchers investigated how atmospheric deposition contributes to microplastic pollution in urban waters. The study found that microplastic deposition fluxes were higher during wet weather than dry weather and showed moderate to strong correlations with atmospheric conditions, demonstrating that airborne microplastic fallout is a meaningful source of contamination in urban water environments.
Assessment of microplastic transport and distribution in the urban environment of Coimbra municipality
Researchers tracked microplastic transport and distribution across five urban watersheds in Coimbra, Portugal, sampling atmospheric deposition, runoff, and streams before and during rainfall. Wet deposition carried more MPs than dry deposition, stream concentrations nearly doubled during rain events, and more urbanized, smaller watersheds had higher MP loads.
Microplastic contamination in an urban area: a case study in Greater Paris
Researchers investigated microplastic contamination across Greater Paris, finding that urban areas generate and accumulate substantial microplastic pollution through multiple pathways including stormwater, atmospheric deposition, and river transport.
Sources, transport, measurement and impact of nano and microplastics in urban watersheds
This review examines what is known about nano and microplastic sources, transport pathways, transformations, and measurement challenges in urban watershed environments, identifying freshwater and terrestrial systems as critically underresearched compared to marine settings. The authors stress that most ocean plastic originates from land, making urban watershed research essential for source control.
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.
Microplastic Pathways in the Portland, OR Region: Results From Stormwater and Atmospheric Sampling
This study quantified microplastics in urban stormwater runoff and atmospheric deposition in the Portland, Oregon region, finding both pathways deliver significant quantities of plastic particles to freshwater systems. Stormwater was found to carry far more microplastics than atmospheric deposition, highlighting urban runoff as a critical pathway requiring management.
Occurrence and risk associated with urban road-deposited microplastics
Researchers collected and analyzed microplastics deposited on urban roads and found average concentrations ranging from 0.33 to 3.64 grams per square meter, with significant variation based on land use and particle size. Road-deposited microplastics were mainly fibers and fragments from tire wear and textile sources, and their risk assessment indicated moderate ecological concern. The study provides new insights into how different urban environments contribute to microplastic pollution through road runoff.
Microplastics from tyre and road wear A literature review
This literature review examines microplastics generated from tire and road wear, identifying road traffic as a significant but often overlooked source of plastic pollution in urban runoff and waterways. The authors assess what is known about tire particle composition, environmental fate, and potential ecological effects.
A Review of Microplastic Pollution Characteristics in Global Urban Freshwater Catchments
This review synthesizes evidence on microplastic pollution characteristics in urban freshwater catchments worldwide, examining sources, concentrations, and transport pathways from terrestrial to marine environments. Researchers found that human activities are the fundamental driver of microplastic pollution and that freshwater catchments serve as critical conduits for microplastic transfer to oceans.
Quantifying and Characterizing Microplastics in the Greater Philadelphia Region
Researchers quantified and characterized microplastic contamination across waterways in the Greater Philadelphia region, examining how plastic degradation from weathering, heat, water, and biological activity introduces microplastics into local water bodies and the atmosphere. The study assessed the scope of contamination and documented the implications of microplastic pollution for aquatic and human health in an urban watershed context.
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.
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.
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.
Pavement wear generates microplastics in stormwater runoff
Researchers conducted a two-year field study showing that pavement wear is a distinct and previously underappreciated source of microplastics in urban stormwater, separate from tire wear. They found that asphalt pavement was most susceptible to degradation in the field, while recycled rubber pavers released the most microplastics in lab testing. The study emphasizes the need to consider microplastic generation during pavement material selection and urban infrastructure planning.
Mass concentrations of common microplastics and tire wear rubbers in urban air
Researchers measured mass concentrations of common microplastics and tire wear rubber particles in ambient urban air, providing quantitative data on airborne plastic pollution that is scarce compared to research on aquatic environments. Tire wear particles were identified as a significant component of airborne plastic contamination in urban settings.
Potential Discharge of Microplastics in Surface Runoff—Bucharest Case Study
Researchers assessed microplastic discharge in surface runoff in Bucharest, Romania, examining plastic particle concentrations, morphologies, and transport pathways as runoff moves from urban surfaces into water systems.
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.
Characterizing microplastics in urban runoff: A multi-land use assessment with a focus on 1–125 μm size particles
Researchers collected stormwater runoff from three different urban land use types and found microplastics present across all sites, with significant variation in polymer types depending on the area. By using multiple detection techniques, they were able to identify particles as small as 1 micrometer, revealing that the smallest size fractions dominated the total count. The study emphasizes that urban runoff is a major pathway for microplastic pollution reaching waterways.