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61,005 resultsShowing papers similar to Quantification and characterization of additives, plasticizers, and small microplastics (5–100 μm) in highway stormwater runoff
ClearQuantification and Chemical Characterization of Plastic Additives and Small Microplastics (<100 μm) in Highway Road Dust
Researchers quantified small microplastics (under 100 micrometers) and plastic additives in highway road dust samples using micro-FTIR analysis. The study found significant concentrations of small microplastics across sampling sites, highlighting road dust as an important but often overlooked source of microplastic contamination that can become airborne or wash into waterways via stormwater runoff.
From the highway to receiving water bodies: identification and simultaneous quantification of small microplastics (< 100 µm) in highway stormwater runoff
Researchers used micro-FTIR vibrational spectroscopy to simultaneously identify and quantify small microplastics (under 100 µm) in highway stormwater runoff sampled at inlet and outlet points of a filtration facility in Italy. Inlet concentrations reached up to 39,813 SMPs/L with polyamide 6 and HDPE dominating, and the treatment system reduced concentrations substantially, though significant microplastic loads still discharged to the receiving water body.
Identification and quantification of tire wear particles by employing different cross-validation techniques: FTIR-ATR Micro-FTIR, Pyr-GC/MS, and SEM
Researchers developed and cross-validated methods using FTIR-ATR, micro-FTIR, pyrolysis-GC/MS, and scanning electron microscopy to identify and quantify tire wear particles in highway stormwater runoff. The study optimized pretreatment methods to extract tire wear particles without degradation, providing more accurate identification and reducing the risk of underestimating this important source of microplastic pollution.
Small microplastics (<100 μm), plasticizers and additives in seawater and sediments: Oleo-extraction, purification, quantification, and polymer characterization using Micro-FTIR
Small microplastics below 100 micrometers, plasticizers, and plastic additives were simultaneously quantified in seawater and sediments from Italian transitional water bodies using oleo-extraction and micro-FTIR, revealing that sub-100-micrometer particles and chemical additives represent a substantial and understudied component of total microplastic contamination.
Microplastic and tyre wear particles at a highway: a case study from Norway
Researchers characterized microplastics including tyre wear particles across air, road runoff, and road dust near a heavily trafficked Norwegian highway using µFTIR and Py-GC/MS, finding the highest MP concentrations in road dust (up to 4250 counts per square meter) and the highest tyre wear particle concentrations in road dust and road runoff. The results showed that road runoff and road dust better reflected local traffic emissions while airborne MPs were more influenced by atmospheric transport.
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.
Road dust-associated microplastics as a carrier of plastic additives in urban small-scale river sediment
Researchers analyzed microplastics and 56 plastic-derived chemicals in road dust, stormwater, and urban river sediments in Kumamoto, Japan. They found that road dust-associated microplastics, including tire wear particles and polyethylene terephthalate, were transferred to river sediments via stormwater, acting as carriers of plastic-derived chemical additives at concentrations up to 32,000 nanograms per gram.
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.
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.
Identification, classification and quantification of microplastics in road dust and stormwater
Researchers identified and quantified microplastics in road dust and stormwater, finding significantly higher concentrations in industrial areas compared to residential zones, with tire wear particles and polyethylene fragments being the most common types.
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.
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.
Source traceability of microplastics in road dust using organic/inorganic plastic additives as chemical indicators
Researchers used organic and inorganic plastic additives as chemical indicators to trace the sources of microplastics found in road dust. By analyzing the chemical fingerprints of additives, they were able to identify specific origins such as tire wear, road markings, and other plastic products. The study demonstrates a new approach for identifying where road dust microplastics come from, which could help develop targeted strategies to reduce stormwater runoff pollution.
Microplastic and tyre wear particles at a highway: a case study from Norway
Researchers monitored microplastics and tire wear particles (tiny rubber fragments shed by vehicles) in air, road runoff, and road dust along a busy Norwegian highway, finding the highest concentrations in road dust and the lowest in air. The study demonstrates that traffic is a major source of microplastic pollution across multiple environmental pathways.
Microplastic discharge and other anthropogenic pollution in urban runoff
Researchers measured microplastic fluxes in urban runoff at four sites in Kuopio, Finland, using fraction filtration and imaging FPA-FTIR spectroscopy, alongside analysis of metals, nutrients, and solid matter. Microplastic concentrations ranged from 0.6 to 46 MPs per litre depending on rain conditions, with an average particle size of 185 micrometres and fibers as the dominant shape, indicating urban runoff as a significant pathway for plastics to enter aquatic systems.
On airborne tire wear particles along roads with different traffic characteristics using passive sampling and optical microscopy, single particle SEM/EDX, and µ-ATR-FTIR analyses
Researchers used passive sampling and advanced analytical techniques including SEM/EDX and micro-ATR-FTIR to characterize airborne tire wear particles along roads with different traffic volumes and speeds. The study found that tire wear particles, a major category of microplastic pollution, varied in concentration and composition depending on traffic characteristics, highlighting roadways as a significant source of airborne microplastic contamination.
Characterization and comparison of microplastic occurrence in point and non-point pollution sources
Wastewater, stormwater runoff, and surface water samples from multiple catchment types were compared for microplastic content, with PET dominating in urban and non-point sources while rubber from tire wear dominated highway runoff, and particles smaller than 0.5 mm passing through both wastewater and stormwater treatment systems.
Occurrence and concentration of 20–100 μm sized microplastic in highway runoff and its removal in a gross pollutant trap – Bioretention and sand filter stormwater treatment train
A stormwater gross pollutant trap followed by bioretention and sand filter treatment was found to remove 20 to 100 micrometer microplastics from highway runoff in addition to larger particles, with removal efficiency dependent on particle size and treatment train configuration.
Method for Identification of Black Microplastics by Using Tire Library
This study developed a tire rubber library to improve identification of black microplastics — tire and road wear particles — using FTIR spectroscopy, which struggles with carbon black-containing materials. Tire particles are a major and often undetected category of microplastic pollution in urban runoff.
Characterization of Particles in Road Surface Sediments for Analyzing Runoff Behavior of Microplastics
Researchers characterized physical properties — density, shape, and material composition — of particles in road surface sediments and stormwater catchpit deposits in Japan using density-gradient separation, image analysis, and ATR-FTIR, finding that synthetic polymers comprised 40-50% of all particles and were concentrated in high-density fractions with Feret diameters of 500-800 micrometers.
Characterization of Airborne Microplastics Particles on Urban Roads: Types, Sizes, and Total Particles
Researchers collected airborne microplastic samples from urban road environments and characterized particle types, sizes, color distributions, and polymer compositions, finding tire-wear rubber and paint fragments alongside fiber and film fragments from packaging and textiles.
Contributing to the assessment of the impact of urban activities on microplastic transport through air and runoff infiltration
Researchers investigated the contribution of urban activities to microplastic transport through both airborne pathways and stormwater runoff infiltration, quantifying plastic particle fluxes in an urban watershed. The study found that road surfaces, construction materials, and tire wear were significant urban sources, with rainfall events mobilizing microplastics into both air and subsurface water.
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.
Plastic additives as tracers of microplastic sources in Japanese road dusts
Road dust from three Japanese cities contained 68 to 230 microplastic pieces per kilogram, with PVC, polymethylmethacrylate, polyvinyl chloride, and polyester making up the majority. Chemical additives found in road microplastics could be matched to specific plastic products like road markings, suggesting that additive profiles can identify the sources of road-derived microplastic pollution.