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20 resultsShowing papers similar to Is plastic dust different from mineral dust? Results from idealized wind tunnel experiments.
ClearIs transport of microplastics different from that of mineral dust? Results from idealized wind tunnel studies
Researchers conducted wind tunnel experiments to examine the detachment and transport behavior of microplastics ranging from 38 to 125 um in diameter from idealized substrates, comparing their aerodynamic behavior to the well-established literature on mineral dust transport. The study identified key differences in microplastic detachment mechanisms relevant to understanding long-range atmospheric dispersal of plastic particles.
Is transport of microplastics different from mineral particles? Idealized wind tunnel studies on polyethylene microspheres
Wind tunnel experiments revealed that plastic (polyethylene) microspheres behave differently from mineral dust particles when transported by wind, particularly on hydrophobic surfaces, where plastic particles detach and become airborne more readily. Particle-to-particle collisions were found to both assist and impede detachment. These findings help explain why microplastics are found in remote atmospheric environments and improve models for predicting how far plastic particles can travel through the air from pollution sources.
Effects of Shape and Size on Microplastic Atmospheric Settling Velocity
Researchers measured atmospheric settling and horizontal drift velocities of various microplastic shapes and sizes in controlled settling chambers, providing empirical data needed to improve atmospheric transport models that explain how microplastics reach remote environments.
Tracing the horizontal transport of microplastics on rough surfaces
Wind tunnel experiments showed that microplastics of different shapes are transported horizontally across rough surfaces at wind speeds above threshold values, with flatter and lighter particles moving farther per wind impulse, providing empirical data for modeling atmospheric microplastic dispersal across terrestrial landscapes.
Macroplastic surface characteristics change during wind abrasion
Laboratory wind tunnel experiments showed that wind-driven abrasion of macroplastics on sandy surfaces produces distinct surface features and generates secondary microplastic particles, demonstrating that wind erosion is a meaningful pathway for plastic fragmentation in arid and coastal environments.
Geometric Form and Density Govern Microplastic Particle Kinetics During Aeolian Transport
Scientists studied how tiny plastic particles move through the air and found that they travel faster and farther than natural particles like sand. This means microplastics can spread much more easily through wind to remote areas where people live, including places far from pollution sources. Understanding how these plastics move through the air is important because it helps explain why microplastics are showing up everywhere on Earth, potentially affecting human health through the air we breathe.
Atmospheric transport dynamics of microplastic fibres
Researchers examined the atmospheric transport dynamics of microplastic fibres within boundary layer flows, comparing their motion to mineral grain transport and finding key differences in behaviour that have important implications for modelling the long-range atmospheric dispersal of microplastics to remote and rural locations.
Atmospheric Resuspension of Microplastics from Bare Soil Regions
Researchers developed a method to estimate how microplastics get lifted from bare soil into the atmosphere along with mineral dust, then modeled their global transport and deposition. They found that this soil-based resuspension is a meaningful source of atmospheric microplastics, with fiber-shaped particles traveling significantly farther than spherical ones. The study suggests that dust storms and wind erosion from agricultural and arid lands may be an underappreciated pathway for spreading microplastic contamination worldwide.
Influence of microplastics on small-scale soil surface roughness and implications for wind transport of microplastic particles
Researchers investigated how microplastics mixed into soil affect surface roughness at small scales, finding that microplastics altered surface texture in ways that could increase soil susceptibility to wind erosion and promote atmospheric transport of microplastic particles.
Data example and code used in the publication "Is transport of microplastics different from that of mineral dust? Results from idealized wind tunnel studies"
This dataset and code repository accompany a wind tunnel study on how microplastic transport by wind compares to mineral dust transport. The study examines whether standard dust transport models can be applied to predict microplastic movement through the atmosphere.
The effects of sediment properties on the aeolian abrasion and surface characteristics of microplastics
Laboratory experiments quantified how sediment properties influence the rate at which wind abrades and fragments exposed microplastics, generating smaller particles. The results improve understanding of aeolian (wind-driven) microplastic fragmentation as a source of airborne micro- and nanoplastics in arid environments.
Quantification of wind-driven MP mobilisation potential in semi-arid regions in Kazakhstan using wind tunnel experiments
Researchers used wind tunnel experiments to quantify wind-driven microplastic mobilisation potential in the semi-arid steppe landscape of northeastern Kazakhstan, finding that the loess soils, flat terrain, and erosive climate create conditions for significant aeolian MP emission particularly as modern agricultural intensification increases plastic inputs.
Entrainment and horizontal atmospheric transport of microplastics from soil
Researchers investigated the mechanisms by which microplastics become entrained from soil into the atmosphere, finding that wind-driven processes can transport plastic particles horizontally near the ground surface, establishing agricultural soils as a significant source of airborne microplastics.
Long-distance atmospheric transport of microplastic fibers depends on their shapes
Researchers developed a theory-based settling velocity model for microplastic fibers in the atmosphere that accounts for fiber shape and cross-sectional dimensions, finding that correctly characterising flat fibers rather than treating them as cylinders increases estimated mean atmospheric residence time by over 450%, suggesting the ocean is a major source of airborne plastic and that long-range transport is far more efficient than previously thought.
The effects of sediment properties on the aeolian abrasion and surface characteristics of microplastics
This study used laboratory wind tunnel experiments to examine how microplastics are physically abraded when transported by wind alongside sand and soil particles, testing angular, sub-rounded, and rounded sediment grains over extended periods. The abrasion altered the surface chemistry and texture of the plastic particles in ways that could affect how they interact with pollutants and organisms in the environment. The work reveals that wind transport does not merely move microplastics — it transforms them, potentially changing their environmental hazard profile.
Vertical concentrations gradients and transport of airborne microplastics in wind tunnel experiments
Wind tunnel experiments tracked how tiny airborne microplastic particles (about half a micrometer in diameter) distribute vertically in moving air, finding conditions under which they can remain suspended and travel long distances. These results help explain how microplastics reach remote environments like mountain peaks and Arctic ice, and contribute to models of human inhalation exposure in urban and rural settings.
Normalized Settling Velocity Governs Short-Range Transport of Atmospheric Microplastics
Wind tunnel experiments showed that how fast a microplastic particle settles under gravity—its normalized settling velocity—is the single best predictor of how far it travels through the air before landing. This finding helps fill a major gap in atmospheric microplastic research by enabling better models of where airborne plastic particles deposit, which affects estimates of human inhalation exposure and ecosystem contamination.
Particle properties and environmental factors control atmospheric transport and deposition of micro- and nanoplastics
Researchers built a mathematical model to predict how micro- and nanoplastics travel through the atmosphere, finding that particles around 1 micrometer in diameter and fiber-shaped plastics can remain airborne for weeks and travel long distances. Factors like wind speed, rainfall, and the particles' own shape and density determine whether plastics stay in the air for seconds or spread globally.
Long-distance atmospheric transport of microplastic fibers depends on their shapes
This study investigated how the shape of microplastic fibers affects how far they travel through the atmosphere. Long, thin fibers stay airborne longer and can be transported greater distances than compact fragments, explaining why synthetic textile fibers are so widely found in remote environments.
Physical characteristics of microplastic particles and potential for global atmospheric transport: A meta-analysis
This meta-analysis pools data from multiple studies to examine the physical characteristics of airborne microplastics and how they travel through the atmosphere. The findings confirm that microplastics can be transported globally by wind, meaning people everywhere are breathing in these particles regardless of how far they live from pollution sources.