We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
A meta-analysis of nanomaterial and nanoplastic fate in small column experiments and implications for fate in soils
Summary
This meta-analysis pools data from column experiments to understand how nanoplastics behave and move through soil. The findings help predict where nanoplastics end up in the ground, which matters for human health because these particles can leach into groundwater or be taken up by crops growing in contaminated soil.
A long list of possible processes may simultaneously control retention of engineered nanomaterials (NMs) and nanoplastics (NPs) in soils, but there is little insight in which of these processes dominates and under which circumstances. Though not easily transferable to field situations, repacked saturated column tests compose the richest available dataset to explore for overall trends in the behaviour of NMs and NPs in soils. Global attachment efficiencies (αglobal) were calculated uniformly from metadata of 624 column experiments and correlated against metadata using partial least squares and linear regression analysis. αglobal values appeared to some extent operationally defined as they correlate with the experimental column flow rate and in some cases with the particle concentration used in the feedstock. Particle aggregation occurred more as the feedstock concentration increased, but this only had a limited effect on subsequent column retention. In homogeneous sandy media, attachment of particles obeyed well-known trends indicative of non-favourable electrostatic interactions, whereas interactions in non-sandy media were dominated by favourable attractions to positively charged sites on clay edges and/or oxides as well as hydrophobic interactions with soil organic matter. The results may help to prioritize further research such as the currently unclear role of hydrophobic interactions in the fate of particles in porous media and identify the most important transport processes in more complex field situations.
Sign in to start a discussion.
More Papers Like This
Microplastics transport in soils: A critical review
Researchers reviewed how microplastics move through soil, finding that their transport depends on a complex mix of particle properties, soil chemistry, water flow, and biological activity — and that these factors often interact in ways that produce contradictory results across studies. The review maps these knowledge gaps and calls for more controlled experiments to predict where microplastics accumulate and how they might reach groundwater or crops.
Transport and transformation of microplastics and nanoplastics in the soil environment: A critical review
This critical review examines how microplastics and nanoplastics move through and transform within soil environments. Researchers discuss aggregation, sorption of contaminants, interactions with soil organisms, and degradation pathways that affect the fate of plastic particles in terrestrial systems. The study identifies major knowledge gaps in understanding subsurface plastic transport and calls for standardized methods to better assess the ecological and health risks of soil plastic pollution.
An insight into laboratory column experiments for microplastic transport in soil
This review synthesizes findings from laboratory column experiments on microplastic transport through soil, examining how particle size, shape, surface chemistry, and soil properties influence how far plastics migrate in the subsurface.
Enhanced mobility and dynamic retention of nanoplastics in mineral coated porous media.
Scientists studied how tiny plastic particles move through different types of soil and sand that might be found in groundwater systems. They discovered that these nanoplastics travel much farther and faster through soil than previously thought, especially when water flows quickly. This matters because it suggests that plastic pollution from things like food packaging and cosmetics could spread more widely through our drinking water sources than we realized.
The Fate and Risk of Micro- and Nanoplastics in Terrestrial Ecosystems
This research review summarizes what scientists currently know about tiny plastic particles (called micro- and nanoplastics) that contaminate soil and land environments. The study found that while researchers have learned a lot about plastic pollution, there are still major gaps in understanding how these particles move through soil, affect plants and animals, and potentially reach humans through food. This matters because these microscopic plastics could enter our food supply through crops grown in contaminated soil, but scientists don't yet fully understand the health risks.