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61,005 resultsShowing papers similar to Physicochemical properties of environmental media can affect the adsorption of arsenic (As) by microplastics
ClearEffects of arsenic on the transport and attachment of microplastics in porous media
Researchers studied how arsenic, a common groundwater contaminant, affects the movement of microplastics through soil. They found that arsenic in water generally reduced how far microplastics traveled by promoting their attachment to soil particles, though this effect depended on arsenic concentration, water flow speed, and soil moisture levels. The findings help predict how microplastics and heavy metals may interact and spread together in underground water systems.
Photo-aged non-biodegradable and biodegradable mulching film microplastics alter the interfacial behaviors between agricultural soil and inorganic arsenic
Researchers found that both biodegradable PLA and non-biodegradable polyethylene mulching film microplastics alter arsenic transport in agricultural soil, with photo-aging changing their adsorption capacity and potentially affecting arsenic mobility and ecological risk.
Effects of Microplastics on the Transport of Soil Dissolved Organic Matter in the Loess Plateau of China
This study examined how polypropylene microplastics affect the movement of dissolved organic matter through agricultural soil in China and found that microplastics can adsorb soil nutrients like phosphorus and ammonium. While this retention might seem beneficial, it alters the natural nutrient cycling that crops depend on. The findings suggest that microplastic accumulation in farmland could gradually change soil chemistry in ways that affect food production.
Mechanistic insight into interactive effect of microplastics and arsenic on growth of rice (Oryza sativa L.) and soil health indicators
Researchers tested how different types of microplastics interact with arsenic contamination in rice paddy soil, finding that biodegradable PLA microplastics actually increased arsenic uptake by rice plants by up to 39%. In contrast, conventional polyethylene microplastics slightly reduced arsenic absorption. This is an important finding because as agriculture shifts toward biodegradable plastics, they may inadvertently increase the transfer of toxic heavy metals from soil into food crops.
Adsorption of As(III) by microplastics coexisting with antibiotics
This study examined how microplastics absorb arsenic, a toxic metal, from water, especially when antibiotics are also present. Smaller and more aged microplastic particles absorbed more arsenic, and environmental factors like pH and dissolved organic matter significantly changed absorption rates. This is relevant to human health because microplastics in contaminated water can concentrate toxic metals like arsenic on their surface and potentially carry them into drinking water or the food chain.
Effects of naturally aged microplastics on the distribution and bioavailability of arsenic in soil aggregates and its accumulation in lettuce
Scientists studied how weathered microplastics interact with arsenic, a toxic element, in soil where lettuce is grown. At low to moderate arsenic levels, the microplastics actually helped the lettuce grow better and reduced arsenic uptake. However, at high arsenic concentrations, microplastics made the toxicity worse, reducing leaf quality and nutrition. This shows that the health impact of microplastics in farming depends heavily on what other contaminants are present in the soil.
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.
Conventional and biodegradable microplastics affected arsenic mobility and methylation in paddy soils through distinct chemical-microbial pathways
A 98-day paddy soil experiment found that conventional microplastics reduced arsenic in porewater but increased methylated arsenic fractions, while biodegradable microplastics increased both porewater arsenic and methylation, suggesting distinct chemical-microbial pathways affecting arsenic mobility and toxicity.
Water-dependent effects of biodegradable microplastics on arsenic fractionation in soil: Insights from enzyme degradation and synchrotron-based X-ray analysis
This study examined water-dependent effects of biodegradable microplastics on arsenic fractionation in soil, finding that moisture regime significantly modifies how biodegradable plastic additions alter arsenic mobility and bioavailability.
[Adsorption Characteristics of Arsenic on UV-aged Polypropylene Microplastics in Aqueous Solution].
This study examined how UV weathering (aging) changes the ability of polypropylene microplastics to adsorb arsenic from water, finding that aged plastic had rougher surfaces and more oxygen-containing groups, which enhanced arsenic adsorption. Environmental factors like pH and dissolved organic matter also influenced how much arsenic stuck to the plastic. Because aged microplastics bind more arsenic, they could carry this toxic heavy metal into aquatic food webs more effectively than pristine plastic particles.
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.
Interface adsorption characteristics of microplastics on multiple morphological arsenic compounds
Researchers studied how polystyrene and PET microplastics adsorb different forms of arsenic, a toxic element commonly found in contaminated water. They found that polystyrene had a much higher capacity to bind arsenic compounds than PET, and that the arsenic-loaded microplastics were more toxic to organisms than either pollutant alone. The study highlights that microplastics can act as carriers for toxic heavy metals, amplifying their environmental harm.
Regulatory mechanism of microplastics on arsenic bioavailability in a subtropical estuary, China
Researchers investigated the regulatory mechanisms by which microplastics influence arsenic bioavailability in sediments of the Min River estuary, a subtropical estuary in China, finding that microplastic pollution alters the dynamics of bioavailable arsenic through interactions with sediment geochemistry and microbial communities.
Adsorption of Arsenic and Cadmium on Biodegradable and Non-Biodegradable Microplastics in Soil: Comparison Based on Batch Experiment
Batch experiments showed that both biodegradable PBSA and conventional LDPE microplastic mulch films adsorbed arsenic(V) and cadmium(II) from soil, with PBSA enhancing arsenic adsorption and LDPE increasing cadmium uptake, altering heavy metal mobility in agricultural soils.
The microplastics distribution characteristics and their impact on soil physicochemical properties and bacterial communities in food legumes farmland in northern China
Researchers surveyed farmland soil across five provinces in northern China and found microplastic contamination ranging from 1,600 to over 36,000 particles per kilogram of soil. Most of the microplastics were small fibers and fragments, primarily from agricultural plastic film and organic fertilizer use. The study found that microplastic presence altered soil properties and shifted bacterial community composition, suggesting these particles may affect soil health in food-growing regions.
Microplastic mediated arsenic toxicity involves differential bioavailability of arsenic and modulated uptake in rice (Oryza sativa L.)
Researchers examined how polyethylene and polylactic acid microplastics interact with arsenic contamination in rice paddies. They found that at low arsenic levels, microplastics actually reduced arsenic uptake by rice plants, but at high arsenic concentrations the combination produced synergistic toxic effects. The study reveals that the interaction between microplastics and heavy metals in agricultural soils is more complex than previously thought and depends heavily on contaminant concentration levels.
Co-transport of arsenic and micro/nano-plastics in saturated soil
Column experiments found that 100 nm nanoplastic particles reduced arsenic transport in saturated sand by adsorbing arsenic ions, while 5 micron microplastics enhanced arsenic transport through electrostatic adsorption and pore plugging, demonstrating size-dependent and opposing effects of micro- and nanoplastics on co-contaminant mobility.
The adsorption process and mechanism of benzo[a]pyrene in agricultural soil mediated by microplastics
Researchers investigated how different types of microplastics affect the adsorption of the carcinogenic pollutant benzo[a]pyrene in agricultural soil. They found that PVC microplastics had the strongest capacity to adsorb this pollutant, increasing soil adsorption by nearly four times compared to soil alone. The study suggests that microplastics in agricultural soils may concentrate harmful organic pollutants, potentially altering their environmental fate and bioavailability.
Effects of different size polylactic acid on arsenic migration and rhizosphere microorganisms in soil-rice system
Researchers found that polylactic acid (PLA), a common biodegradable microplastic, increased the availability of toxic arsenic in rice paddies by changing soil chemistry and promoting bacteria that convert arsenic into more dangerous forms. Nano-sized PLA particles were particularly harmful, promoting arsenic uptake into rice plants, while larger particles actually blocked it. This study is important for food safety because it shows that even biodegradable plastics in agricultural soil can increase toxic contamination in rice, a staple food for billions of people.
The Distribution and Migration of Microplastics in Soils From Different Agricultural Farmlands in China
Researchers conducted the first comprehensive nationwide analysis of microplastics in Chinese farmland soils, covering 169 sites across 31 provinces. They found microplastic levels ranging from 240 to 12,720 items per kilogram, with polyethylene films being the most common form, largely driven by agricultural practices and atmospheric deposition. The study revealed that soil pH was negatively correlated with microplastic abundance, providing new insights into the factors driving microplastic distribution in agricultural environments.
The adsorption of arsenic on micro- and nano-plastics intensifies the toxic effect on submerged macrophytes
Researchers investigated how arsenic adsorbs onto microplastics of varying types and sizes, and how those particles affect underwater plants. They found that nanoplastics increased arsenic absorption in aquatic macrophytes by 36-47%, causing more severe leaf damage and oxidative stress than either contaminant alone.
Agronomic practices and road proximity drive plastic pollution in agricultural soils: Insights from Bihar, India on weathering, elemental association, and ecological risk
Researchers surveyed 22 agricultural sites in Bihar, India, measuring microplastic contamination in soil across different farming practices and road distances. Mulched fields near roads had the highest concentrations (up to 1,460 particles/kg), while PE and PP polymers dominated, and microplastics were found to adsorb multiple heavy metals including lead, arsenic, and cadmium.
The interfacial behaviors of different arsenic species on polyethylene mulching film microplastics: Roles of the plastic additives
This study examined how plastic additives in polyethylene mulching film microplastics affect their ability to adsorb arsenic species from soil and water. Films containing calcium carbonate and titanium dioxide additives bound arsenic differently than virgin polyethylene, showing that additive composition meaningfully alters the contaminant-carrying behavior of agricultural plastic MPs.
Distribution characteristics of soil microplastics and their impact on soil physicochemical properties in agricultural areas of the North China plain
Microplastics are accumulating across agricultural soils of the North China Plain, with this study finding moderate-to-low abundance across multiple land use types and detecting that plastic particles affect soil texture, bulk density, and water-holding capacity. Altered soil physical properties from microplastic contamination could impair crop growth and soil fertility over time, with implications for food security.