We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Transport Mechanisms of Nanoplastics in Agricultural Soils Under Snowmelt Infiltration Conditions in Cold Regions
AI summary Read the abstract
Researchers investigated how nanoplastics migrate with snowmelt water through three agricultural soil types (luvisol, chernozem, and albic soil) under freeze-thaw conditions, finding that chernozem showed peak nanoplastic concentrations of 25.62 mg/kg in the vertical profile and that biochar amendment modified nanoplastic transport behavior across all soil types.
Abstract This study was conducted to uncover the migration characteristics of nanoplastics (NPs) permeating with snowmelt water in freeze‐thaw soil and their regulatory mechanisms. Luvisol (LCK), chernozem (CCK), and albic soil (ACK) were selected as porous media, and two scenarios of tetracycline and tetracycline plus biochar were established (LTL and LTLB for luvisol, CTL and CTLB for chernozem, and ATL and ATLB for albic). With snowmelt infiltration, soil NPs concentration in the CCK treatment had a peak value of 25.62 mg kg −1 in the vertical profile, whereas the ACK and LCK treatments were 5.32% and 7.79% higher than the CCK treatment, respectively. The presence of tetracycline and biochar provided additional adsorption sites for NPs, which in turn promoted the deposition and sequestration effects of NPs. This research constructed an innovative migration model of soil NPs under snowmelt infiltration and confirmed that soil NPs would be strongly resolved and re‐migrate under extreme snowfall. Moreover, the NPs in the chernozem would reach 2.12 mg kg −1 at the vertical profile crest after 20 years, which is 6.19% and 19.88% lower relative to the albic soil and luvisol, respectively. Finally, the Extended Derjaguin‐Landau‐Verwey‐Overbeek (XDLVO) theory measurements demonstrated that the energy barrier heights of the ATL and ATLB treatments in albic soil were 16.80% and 36.91% lower than the ACK treatment, respectively. The lower height of the energy potential barrier makes NPs more accessible to soil particles, which reconfirms that the presence of biochar coupled with tetracycline mediation can effectively inhibit the dissociation release characteristics of soil NPs.
More Papers Like This
Transport of plastic particles in natural porous media under freeze–thaw treatment: Effects of porous media property
AI summary Read the abstract
Researchers tested how freeze-thaw cycling affects the transport of nanoplastics through columns of natural soils with different textures. Freeze-thaw treatment increased nanoplastic transport through quartz sand by smoothing grain surfaces but reduced transport through loamy and sandy natural soils by creating new retention sites, demonstrating that soil type determines how freeze-thaw affects plastic mobility.
Mobility of polypropylene microplastics in stormwater biofilters under freeze-thaw cycles
AI summary Read the abstract
Researchers discovered that freeze-thaw cycles move deposited microplastics deeper into stormwater biofilter soil than simple drying-and-wetting cycles, because expanding ice crystals break up the soil and release trapped particles. This finding suggests that in cold climates, microplastics filtered from stormwater could migrate further underground than previously estimated.
Mechanism of nanoplastics altering soil carbon turnover under freeze-thaw cycle
AI summary Read the abstract
Researchers used rare earth oxide tracers and carbon-13 isotope labeling combined with soil microstructure scanning CT to study how nanoplastics alter soil carbon cycling under freeze-thaw conditions. Nanoplastics destabilized soil aggregates during freeze-thaw cycles, accelerating organic carbon turnover and potentially increasing CO2 emissions from cold-region soils.
The individual transport, cotransport and immobilization with solar pyrolysis biochar of microplastics and plasticizer in sandy soil
AI summary Read the abstract
Researchers tracked the individual transport, co-transport, and immobilization of microplastics in porous media, finding that plastic particle behavior differs significantly depending on surface charge and pore structure interactions. The results improve predictions of where microplastics migrate and accumulate in soils and aquifers.
Migration of Nanoplastic in Soil: Effects of Polymer Properties and Rainfall Conditions
AI summary Read the abstract
Researchers investigated the vertical migration of nanoplastics in soil under simulated rainfall, examining how polymer type, concentration, aging, rainfall duration, and pH affect transport behavior. Rainfall promoted nanoplastic entry and retention in upper soil layers, with long-term rainfall driving gradual migration to deeper layers, and nanoplastic mobility found to be inversely related to particle concentration.
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.