We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Temporal and spatial variations of microplastics in roadside dust from rural and urban Victoria, Australia: Implications for diffuse pollution
AI summary Read the abstract
Roadside dust in rural and urban Victoria, Australia, contained 20 to 529 microplastic items per kilogram across two seasons, with polyester and polypropylene the dominant plastic types, and fiber the most common shape. Urbanization and rainfall were key drivers of microplastic accumulation, and concentrations were consistent between seasons at each site.
Microplastic pollution is an important issue for environmental management as their ubiquity in marine and freshwaters has been confirmed. Pollution sources are key to understanding how microplastics travel from land to open oceans. Given that information regarding microplastic transport from diffuse sources is limiting, we conducted a study on roadside dust from rural and urban Victoria, Australia, over two seasons. Any deposited fugitive dust and particulate matter may also be present in our samples. The average microplastic abundance over two seasons ranged from 20.6 to 529.3 items/kg (dry weight based), with a predominant portion of fibers and items less than 1 mm. Polyester and polypropylene were the dominant polymer types (26%) while cotton and cellulose were the most common non-plastic items (27%). Sampling sites displayed consistent microplastic abundances over time and shared similar patterns in size, shape and polymer composition. Multiple correlation and principal component analysis suggest that urbanization and rainfall are important influences to roadside microplastic accumulation. The observed microplastic hotspots were generally located within close vicinity of areas where urban intensive land use and regional population sizes are high. Microplastics accumulated on roads and road verges during periods of dry weather and were flushed away during heavy storms while the corresponding trigger value was unknown. Monitoring roadside dust can be considered as an initial and cost-effective screening of microplastic pollution in urban areas. Further efforts should be made to optimize the methodologies and we advocate prolonged sampling schemes for roadside dust monitoring.
More Papers Like This
Quantification of selected microplastics in Australian urban road dust
AI summary Read the abstract
Researchers measured microplastic concentrations in road dust along an urban-to-rural corridor in southeast Queensland, Australia, and found levels ranging from about 0.5 mg/g in rural areas to 6 mg/g in Brisbane's city center. The smallest size fraction (under 250 micrometers) contained the most microplastic by mass, and polyvinyl chloride and polyethylene terephthalate were the most common types. Microplastic levels correlated significantly with traffic volume, suggesting vehicle activity is a major contributor to microplastic pollution in urban environments.
Quantification of selected microplastics in Australian urban road dust
AI summary Read the abstract
Researchers quantified microplastics in road dust along an urban-to-rural transect in Southeast Queensland, Australia, using Accelerated Solvent Extraction followed by pyrolysis GC-MS to measure six polymer types across five size fractions. Concentrations ranged from 0.5 mg/g in rural areas to 6 mg/g in Brisbane city, with PVC and PET dominating and the sub-250 µm fraction containing the majority of mass, and vehicle volume explaining 63% of the variance in microplastic concentration.
Deposition of Roadside Atmospheric Non-Tire Wear Microplastics: Characteristics and Influencing Factors
AI summary Read the abstract
A year-long roadside study measured the atmospheric deposition of microplastics in two size fractions, finding deposition rates of 3–9 million particles per hectare per month for larger particles and identifying polymers including PP, PE, PS, PVC, PET, and nylon. Traffic was the dominant source of larger particles near the road, while wind patterns dispersed smaller particles more broadly from industrial sources. Roads are a major but underappreciated source of airborne microplastic deposition into surrounding soils and waterways, and this study quantifies that contribution with new precision.
Spatiotemporal distribution and potential sources of atmospheric microplastic deposition in a semiarid urban environment of Northwest China
AI summary Read the abstract
Atmospheric microplastic deposition in a semiarid urban environment in northwest China ranged from 79.5 to 810.0 particles per square meter per day, with peak deposition in summer, fibres and fragments dominating, and source analysis pointing to local plastic products and waste as primary contributors.
Spatiotemporal occurrence and characteristics of microplastics in the urban road dust in a megacity, eastern China
AI summary Read the abstract
Researchers collected road dust samples from different areas of Nanjing, a major city in eastern China, and found an average of 143 microplastic particles per square meter. Commercial and heavy industrial zones had the highest contamination levels, with 29 different polymer types identified across the city. The study found that urban land use, recent rainfall, and particulate matter levels were the main factors influencing microplastic pollution patterns in road dust.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.