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61,005 resultsShowing papers similar to Soil dissolved organic carbon governs the transport of polyethylene terephthalate microplastics in heterogeneous soil systems
ClearTransport behavior of microplastics in soil‒water environments and its dependence on soil components
Researchers studied how polystyrene microplastics move through columns packed with different soil components and found that soil organic matter allowed the highest transport efficiency, with over 90 percent of particles passing through. Electrostatic repulsion between the negatively charged microplastics and soil particles was a key factor driving migration. The results suggest that soil composition plays a major role in determining how far microplastics can travel underground toward water sources.
Characteristics and Driving Mechanism of Soil Organic Carbon Content in Farmland of Beijing Plain: Implication for the Fate of Engineered Polymers in Soil
This study examined how soil organic matter affects the transport of ions and particles in agricultural soils, relevant to understanding how microplastics interact with soil chemistry. Soil organic carbon content significantly influenced the mobility of contaminants through soil systems.
Polyethylene microplastics influence the transport of organic contaminants in soil
Laboratory experiments showed that polyethylene microplastics in soil altered the transport and distribution of organic contaminants, acting as secondary carriers that changed contaminant mobility through the soil matrix. The findings suggest microplastics in agricultural soils could inadvertently redistribute pesticides and other pollutants, with implications for groundwater quality.
Quantifying the effects of different concentrations of Microplastics on and the leaching of dissolved organic carbon in a soil suspension experiment
Researchers quantified the release of dissolved organic carbon (DOC) and other dissolved substances from soil under the influence of low-density polyethylene (LDPE) and polyethylene terephthalate (PET) microplastics at varying concentrations using soil suspension experiments with beech forest soil from the Abruzzo mountains in Italy. The study aimed to characterise how microplastic type and concentration affect DOC leaching in terrestrial environments.
Quantifying the effects of different concentrations of Microplastics on and the leaching of dissolved organic carbon in a soil suspension experiment
Researchers quantified the release of dissolved organic carbon (DOC) and other dissolved substances from beech forest soil spiked with LDPE or PET microplastics at varying concentrations in soil suspension experiments. The study aimed to determine how microplastic type and concentration influence DOC leaching dynamics in terrestrial soils.
Microplastic effects on soil organic matter dynamics and bacterial communities under contrasting soil environments
Researchers compared microplastic effects on soil organic matter dynamics and bacterial communities across contrasting soil environments, finding that the type of microplastic polymer and soil conditions together determine whether microbial activity and carbon cycling are stimulated or suppressed.
Distribution and dynamics of microplastics in soils
This doctoral research mapped how microplastics are distributed and transported through soils, examining how soil properties like texture and organic matter influence their accumulation, breakdown, and mobility into groundwater. Because soils are both a major sink and a transfer medium for microplastics, this work helps build the foundation needed for assessing contamination risks to agriculture and drinking water.
Dispersion and transport of microplastics in three water-saturated coastal soils
Transport of three sizes of microplastics (0.3, 0.5, and 1 micrometer) through three water-saturated coastal soils was compared, finding that soil properties including organic matter content and ionic composition strongly influenced microplastic mobility and dispersion.
Microplastic coupled with soil dissolved organic matter mediated changes in the soil chemical and microbial characteristics
Researchers conducted a two-month incubation experiment to study how polyethylene microplastics of different sizes and concentrations affect soil carbon composition and microbial communities. They found that microplastics altered the dissolved organic matter in soil and shifted how microbial communities utilized carbon sources. The study suggests that microplastic accumulation in agricultural soils may have cascading effects on soil health and nutrient cycling.
Diverse Impacts of Microplastic-derived Dissolved Organic Matter at Environmentally Relevant Concentrations on Soil Dissolved Organic Matter Transformation
Researchers examined how dissolved organic matter leached from biodegradable and conventional agricultural mulch microplastics affects soil chemistry at environmentally realistic concentrations. They found that UV-exposed microplastic leachates were more bioavailable and caused greater changes to soil organic matter than those produced in dark conditions. The study suggests that even at low concentrations, microplastic-derived compounds can meaningfully alter soil carbon dynamics, with effects varying by soil type.
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.
Spatiotemporal heterogeneous effects of microplastics input on soil dissolved organic matter (DOM) under field conditions
Researchers conducted a long-term field experiment and found that microplastic inputs have spatiotemporally heterogeneous effects on soil dissolved organic matter (DOM), with implications for soil carbon dynamics under increasing terrestrial plastic contamination.
Microplastic polymer type impacts water infiltration and its own transport in soil
Researchers examined how different types of microplastics move through soil and affect water infiltration. They found that polypropylene, being more hydrophobic, impeded water flow more strongly than polyethylene terephthalate, while PET was more mobile in the soil column. The study suggests that a microplastic's surface properties and density play key roles in determining both how it travels through soil and how much it disrupts water movement.
Microplastic-DerivedDissolved Organic Matter RegulatesSoil Carbon Respiration via Microbial Ecophysiological Controls
Researchers investigated how microplastic-derived dissolved organic matter influences soil carbon respiration, finding that carbon compounds leached from microplastics alter soil heterotrophic microbial ecophysiology and thereby affect carbon sequestration dynamics in contaminated soils.
Microplastic-Derived Dissolved Organic Matter Regulates Soil Carbon Respiration via Microbial Ecophysiological Controls
Researchers investigated how dissolved organic matter released by microplastics affects the way soil microbes process carbon. They found that compounds leaching from both new and aged microplastics stimulated soil carbon release, with aged microplastics having a larger effect by altering microbial community structure. The findings suggest that microplastic pollution may influence soil carbon cycling and potentially affect how effectively soils store carbon.
The bridging role of soil organic carbon in regulating bacterial community by microplastic pollution: Evidence from different microplastic additions
This study tested how three common microplastics -- polyethylene, polystyrene, and PVC -- affect soil health when present at realistic concentrations. All three types changed the soil's chemistry and shifted the balance of bacterial communities, which matters because these same soil changes can affect the crops we grow and the food chain that ultimately impacts human health.
[Effects of Polyethylene Microplastics with Different Particle Sizes on Soil Organic Carbon Characteristics and Mineralization in Agricultural Soil].
Researchers conducted a 180-day indoor soil cultivation experiment to investigate how polyethylene microplastics of different particle sizes — millimeter-scale, micrometer-scale — affect soil organic carbon characteristics and mineralization processes in agricultural soil.
Vertical migration of microplastics in porous media: Multiple controlling factors under wet-dry cycling
Researchers studied how microplastics move vertically through sandy soil during cycles of wetting and drying, testing four common plastic types at various particle sizes. They found that smaller, more hydrophobic particles migrated deeper, and that frequent wet-dry cycles and the presence of dissolved organic matter accelerated downward movement. The findings suggest that microplastics in agricultural soils could potentially reach groundwater, posing risks to underground water quality.
Processes controlling the transportation of microplastics in agricultural soils
Researchers investigated the physical processes controlling microplastic transport through agricultural soils, examining how soil structure, water flow, bioturbation, and particle properties interact to move microplastics from surface application sites deeper into the soil profile or laterally toward aquatic systems. The study addressed the dual role of agricultural soils as both sinks and potential sources of microplastic pollution to surrounding environments.
Microplastics and nanoplastics barely enhance contaminant mobility in agricultural soils
A mesocosm study found that micro- and nanoplastics in agricultural soils had minimal effect on the mobility of sorbed organic contaminants toward deeper soil layers, suggesting that concerns about plastics significantly enhancing contaminant transport to groundwater may be overstated under typical field conditions.
Microplastics effects on wettability, pore sizes and saturated hydraulic conductivity of a loess topsoil
Researchers tested how polyethylene terephthalate (PET) and polystyrene microplastics at concentrations already found in farmland soils affect key physical properties of agricultural soil. They found that adding microplastics reduced the soil's ability to conduct water and hold moisture, with larger particles at higher concentrations causing the greatest changes. The study suggests that microplastic accumulation in agricultural soils could alter water movement and availability in ways that may affect crop growth.
Mechanism of polyethylene and biodegradable microplastic aging effects on soil organic carbon fractions in different land-use types
Researchers compared how polyethylene and biodegradable microplastics at different stages of aging affect soil organic carbon fractions across various land-use types. The study found that both types of microplastics altered soil carbon dynamics, but the effects depended on the plastic type, its degree of aging, and the specific land-use context.
Microplastics alter microbial structure and assembly processes in different soil types: Driving effects of environmental factors
Researchers investigated how biodegradable polylactic acid and conventional polyethylene microplastics affect soil microbial communities across different soil types. They found that PLA increased dissolved organic carbon and pH while decreasing nitrogen availability, whereas polyethylene had contrasting effects depending on soil type. The study reveals that microplastic impacts on microbial community structure and assembly processes are soil-type-specific, with dissolved organic carbon driving changes in red soil and pH being the primary factor in fluvo-aquic soil.
Distribution characteristics and mechanism of microplastics mediated by soil physicochemical properties
Five Chinese soils varied considerably in their capacity to adsorb polystyrene microplastics, with soil organic carbon content showing the strongest positive correlation and clay content showing a negative correlation. The results help predict how soil composition will determine the fate and mobility of microplastics in different agricultural and natural landscapes.