We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Impact of erodent shape on microplastic breakdown during wind erosion
Summary
Researchers designed abrasion simulation experiments using three different erodent shapes (rounded, sub-angular, and angular sediments) and three sizes of polyethylene spheres to investigate how erodent geometry influences the mechanical breakdown of microplastics during wind erosion, finding that erodent shape significantly affects fragmentation rate and the generation of secondary nanoplastics.
Microplastics in sedimentary environments can be subjected to mechanical abrasion when transported by the wind. The abrasion process changes the physical and chemical characteristics such as texture, size and shape, and breaks down the plastic, creating more microplastics and nanoplastics. To investigate the importance of erodent shape on the breakdown of microplastics during wind erosion a set of abrasion simulation experiments were designed with three different shapes of sediments (rounded, sub-angular and angular) and three sizes of polyethylene spheres (small, medium and large). The erodent effects were quantified by examining the particle velocity dynamics and changes in the physical-chemical properties of the microplastic surfaces. Preliminary results explain that the microplastics abraded with rounded-subangular sediments are exposed to higher particle velocities than the angular sediments in the experimental conditions. During the abrasion process the fragments that break away from the sediments adhere to the microplastic surfaces and change the chemical composition. The angular sediment produces the highest amount of fragments which adhere more quickly to the microplastic surfaces than the rounded-sub angular sediment. Larger microplastics tended to reduce their size with more hours of abrasion, and small-medium microplastics tended to retain their size. The results contribute towards understanding the origins and aerodynamic pathways of the microplastics, helping to explain possible sources of microplastic pollution in remote environments. Ongoing work will continue to investigate the erosion effects of different combinations of sediments and microplastic types. Also see: https://micro2024.sciencesconf.org/559073/document
Sign in to start a discussion.
More Papers Like This
Impact of erodent shape on microplastic breakdown during wind erosion
Researchers simulated wind erosion abrasion using three sediment erodent shapes (rounded, sub-angular, angular) against three sizes of polyethylene spheres to quantify how erodent geometry drives the physical breakdown of microplastics into smaller particles, including nanoplastics, in aeolian transport environments.
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.
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.
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.
Size, shape, and elemental composition as predictors of microplastic surface erosion
Scientists examined 146 microplastic particles and found that surface erosion depends on particle size and shape — larger particles and irregularly shaped fragments showed more surface degradation than small, round microbeads. More eroded surfaces can release more chemicals and create more nanoplastic fragments. These findings help researchers better assess which types of microplastics may pose the greatest environmental and health risks.