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20 resultsShowing papers similar to Use of EDTA and CaCl2 Extraction Methods to Predict the Bioavailability of Heavy Metals in Soils Polluted with Microplastics
ClearInfluence of polyethylene-microplastic on environmental behaviors of metals in soil
Researchers investigated how polyethylene microplastics affect the adsorption, desorption, and bioavailability of heavy metals in soil. They found that adding microplastics altered how metals bind to soil particles and increased the mobility of certain metals like cadmium and lead. The study suggests that microplastic contamination in soils may change the environmental behavior of heavy metals, potentially increasing their availability to plants and soil organisms.
The effects of microplastics on heavy metals bioavailability in soils: a meta-analysis
This meta-analysis of 790 data sets found that microplastics can increase the availability of toxic heavy metals like copper, lead, and cadmium in soil. This means plastic pollution may make it easier for dangerous metals to enter the food chain through crops, potentially increasing health risks for people.
Microplastics in soils with contrasting texture, organic carbon and mineralogy: changes in cadmium adsorption forms and their mobility in soil columns
This study investigated how high-density polyethylene microplastics alter the behavior of cadmium — a toxic heavy metal — in soils with different textures, organic carbon contents, and mineral compositions. Using soil column experiments, researchers found that microplastics changed how cadmium binds to soil particles and how easily it leaches downward, with effects varying depending on the soil type and microplastic particle size. Since cadmium is a known carcinogen and agricultural soils commonly contain both microplastics and heavy metals, understanding their interactions is critical for food safety.
Effect of Microplastics on the Adsorption and Desorption Properties of Cadmium in Soil
Polyethylene and polypropylene microplastics were found to reduce soil's capacity to adsorb cadmium, a toxic heavy metal, raising concerns that microplastic contamination in farmland soils could increase the mobility and risk of heavy metal pollutants.
Microplastics can affect soil properties and chemical speciation of metals in yellow-brown soil
Researchers added five polymer types (LLDPE, PA, PU, PS, LDPE) at various concentrations to yellow-brown soil and measured their effects on soil physicochemical properties and the speciation of cadmium, copper, lead, and zinc. MPs shifted heavy metal distribution toward more bioavailable fractions, suggesting that microplastic contamination can increase the extractability and potential toxicity of co-occurring metals in soil.
Effects of microplastics and cadmium co-contamination on soil properties, maize (Zea mays L.) growth characteristics, and cadmium accumulation in maize in loessial soil-maize systems
Researchers studied the combined effects of polyethylene microplastics and cadmium on soil properties and maize growth through pot experiments. They found that microplastics altered soil nutrient availability and, depending on size and concentration, either increased or decreased cadmium uptake by the plants. The study suggests that microplastic contamination in agricultural soils can change how crops absorb toxic heavy metals, with potential implications for food safety.
Polyethylene and poly (butyleneadipate-co-terephthalate)-based biodegradable microplastics modulate the bioavailability and speciation of Cd and As in soil: Insights into transformation mechanisms
Biodegradable PBAT and conventional polyethylene microplastics added to soil were both found to alter soil physicochemical properties and change the speciation and bioavailability of heavy metals including lead and cadmium. The study highlights that both conventional and so-called biodegradable microplastics can exacerbate heavy metal risks in contaminated agricultural soils.
Polyethylene and polypropylene microplastics reduce chemisorption of cadmium in paddy soil and increase its bioaccessibility and bioavailability
Researchers found that polyethylene and polypropylene microplastics reduce cadmium chemisorption in paddy soil while increasing its bioaccessibility and bioavailability, suggesting that microplastic contamination in rice paddies could enhance heavy metal uptake by crops and human dietary exposure.
Response of soil heavy metal forms and bioavailability to the application of microplastics across five years in different soil types
Researchers conducted a five-year experiment examining how microplastics affect the chemical forms and bioavailability of heavy metals across five different soil types. They found that microplastics generally reduced the readily available forms of heavy metals while increasing the mineral- and organic-bound forms, and that the bioconcentration of chromium and lead decreased substantially. The study suggests that soil type and exposure duration both play important roles in how microplastics influence heavy metal behavior in soils.
Polyethylene microplastics increase cadmium uptake in lettuce (Lactuca sativa L.) by altering the soil microenvironment
This study found that polyethylene microplastics in soil increased the amount of cadmium, a toxic heavy metal, that lettuce plants absorbed. The microplastics changed soil chemistry by lowering pH and increasing dissolved organic carbon, which made cadmium more available for plant uptake. This is concerning because it suggests that microplastics in agricultural soil could make crops more contaminated with heavy metals, increasing the health risks for people who eat them.
Insight into the interactions between microplastics and heavy metals in agricultural soil solution: adsorption performance influenced by microplastic types
Environmental-simulating microplastics (aged under environmental conditions) showed higher cadmium and chromium adsorption capacity than commercial microplastics in agricultural soil solutions, with surface oxidation increasing adsorption—suggesting that aged microplastics are more effective co-transporters of heavy metals in contaminated agricultural soils.
Evaluating the impacts of microplastics on agricultural soil physical, chemical properties, and toxic metal availability: An emerging concern for sustainable agriculture
This study tested how five common types of microplastics affect soil properties and heavy metal availability in agricultural soil over 90 days. Microplastics changed soil structure, nutrient levels, and water-holding capacity, and actually reduced the availability of toxic heavy metals at higher plastic concentrations -- highlighting the complex ways plastic pollution is altering the farmland that produces our food.
Exploring the interaction between microplastics and heavy metals: unveiling the impact of microplastics on lead sorption and desorption in soil
Researchers conducted batch experiments to examine how high-density polyethylene microplastics affect the adsorption and desorption of lead in agricultural soil under different conditions, finding that equilibrium was reached within 120 minutes and that microplastics altered lead sorption kinetics. The presence of HDPE microplastics changed soil's capacity to retain or release lead, which has implications for heavy metal mobility and crop uptake in contaminated farmland.
Impacts of polyethylene microplastics on bioavailability and toxicity of metals in soil
Researchers studied how polyethylene microplastics affect the bioavailability and toxicity of copper and nickel in soil using earthworms as test organisms. They found that adding microplastics to contaminated soil increased the bioavailability of the metals and enhanced their toxic effects on the earthworms. The study suggests that microplastics in soil can worsen heavy metal pollution by making metals more accessible and harmful to soil-dwelling organisms.
Influence of Different Microplastic Forms on pH and Mobility of Cu2+ and Pb2+ in Soil
Researchers investigated how different microplastic forms influence soil pH and the mobility of copper and lead ions, finding that microplastics' surface properties and electrostatic interactions can modify heavy metal sorption and alter the soil microenvironment.
Microplastics change soil properties, heavy metal availability and bacterial community in a Pb-Zn-contaminated soil
This study found that adding six different types of microplastics to soil contaminated with lead and zinc changed the soil's chemistry, increased the availability of those toxic metals, and shifted the bacterial communities living in the soil. Higher doses of microplastics caused greater disruption, reducing microbial diversity and altering nutrient cycling. The findings suggest that microplastics in contaminated soil could make heavy metals more likely to enter plants and the food chain.
Impacts of polypropylene microplastics on the distribution of cadmium, enzyme activities, and bacterial community in black soil at the aggregate level
Researchers found that adding polypropylene microplastics to soil contaminated with cadmium (a toxic heavy metal) changed how the metal distributed across different soil particle sizes and shifted bacterial communities. The microplastics increased cadmium availability in some soil fractions, potentially making it easier for plants to absorb this toxic metal. This suggests that microplastic-contaminated farmland may pose greater heavy metal exposure risks for crops and, ultimately, for people who eat them.
Microplastics alter cadmium accumulation in different soil-plant systems: Revealing the crucial roles of soil bacteria and metabolism
A study found that microplastics in soil can change how much cadmium, a toxic heavy metal, is absorbed by food crops, with the effects varying depending on soil type and the amount of plastic present. By altering soil chemistry and bacterial communities, microplastics reshape how pollutants move through farmland and into the food we eat.
Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation
Researchers investigated how two types of microplastics, high-density polyethylene and polystyrene, at various concentrations affect cadmium uptake and toxicity in maize plants grown in agricultural soil. The study found that while polyethylene alone had no significant effect, polystyrene at higher doses altered cadmium accumulation patterns, suggesting that different plastic types may interact differently with heavy metals in soil.
[Effects of Microplastics on the Leaching of Nutrients and Cadmium from Soil].
A soil column experiment showed that polystyrene and polylactic acid microplastics at varying concentrations affected how nutrients (nitrogen, phosphorus, potassium) and the heavy metal cadmium leach out of soil during simulated rainfall. Higher microplastic concentrations generally altered leaching patterns, raising concerns that microplastic contamination in agricultural soils could change nutrient availability for crops and increase the mobility of toxic heavy metals into groundwater.