We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Interactions between microplastics from agricultural films and soil in regulating atrazine adsorption: A mechanistic and environmental relevance study.
AI summary Read the abstract
Lab tests mixed microplastics from weathered or new plastic farm films into soil to see how they affect the soil's ability to hold the pesticide atrazine. Weathered plastic particles, which had rougher surfaces and oxygen-containing chemical groups, bound atrazine more strongly than new plastic, with particle size, amount of plastic, and aging level all affecting the results.
The widespread application of agricultural films has resulted in the accumulation of microplastics (MPs) in soils, creating a coexistence with pesticides like atrazine. This study investigates the environmentally relevant interactions between field-aged polyethylene agricultural films (FAPE), virgin polyethylene (VPE), and soil in regulating atrazine adsorption. SEM-EDS and Raman analyses revealed that field aging significantly alters MP properties, introducing roughness, cracks, and oxygen-containing functional groups. Batch experiments demonstrated that the addition of MPs (1 wt%) to black soil enhances the overall adsorption capacity for atrazine, with FAPE exhibiting a higher affinity than VPE. Kinetic and isotherm modeling indicated that adsorption is a multi-step process controlled by intra-particle diffusion and surface heterogeneity. Density functional theory and interaction region indicator analyses further suggested that oxidation-induced functional groups on FAPE facilitate additional intermolecular interactions, including possible hydrogen bonding, beyond the van der Waals interactions dominating VPE. Particle size, MP dosage, and aging degree collectively influenced atrazine partitioning between soil and MPs, highlighting the importance of MP characteristics in regulating pesticide fate. These findings demonstrate that environmental aging substantially alters the adsorption behavior of agricultural-film-derived MPs and should be considered when evaluating the environmental fate and ecological risks of pesticides in agricultural soils.
More Papers Like This
A comparative study on the adsorption behavior of pesticides by pristine and aged microplastics from agricultural polyethylene soil films
AI summary Read the abstract
Researchers compared how pristine and aged agricultural polyethylene film microplastics adsorb pesticides. They found that aged films, which develop rougher surfaces, more cracks, and oxygen-containing chemical groups, adsorb pesticides more readily than pristine ones. The study suggests that weathered agricultural microplastics in soil may act as carriers for pesticide contamination, potentially increasing environmental and human health risks.
Behavior and mechanism of atrazine adsorption on pristine and aged microplastics in the aquatic environment: Kinetic and thermodynamic studies
AI summary Read the abstract
Researchers systematically explored how the pesticide atrazine adsorbs onto both pristine and aged microplastics in aquatic environments. The study found that aged microplastics had higher adsorption capacities than pristine ones, with the aging process and pH significantly affecting surface charge and adsorption behavior, suggesting that weathered microplastics may carry greater loads of chemical contaminants.
Effects of microplastics on the environmental behaviors of the herbicide atrazine in soil: Dissipation, adsorption, and bioconcentration
AI summary Read the abstract
Researchers examined how the presence of microplastics in soil affects the behavior of the herbicide atrazine, including how quickly it breaks down and how much is absorbed by plants. They found that microplastics reduced the herbicide's half-life in soil, increased its adsorption to soil particles, and significantly boosted its uptake into plant tissues. The study suggests that microplastic contamination in agricultural soils could change how pesticides behave, potentially increasing crop contamination.
Adsorption behavior and mechanism of five pesticides on microplastics from agricultural polyethylene films
AI summary Read the abstract
Researchers studied how five common pesticides adsorb onto polyethylene microplastics derived from agricultural soil films. They found that all five pesticides bind to microplastic surfaces, with the process driven by both physical and chemical interactions. The study suggests that microplastics in agricultural soils could act as carriers for pesticide contamination, with adsorption capacity varying depending on the pesticide's chemical properties.
Insight into the effect of microplastics on the adsorption and degradation behavior of thiamethoxam in agricultural soils
AI summary Read the abstract
Researchers found that microplastics in agricultural soil alter both the adsorption and degradation behavior of the pesticide thiamethoxam, with different plastic types showing varying effects on how the pesticide binds to soil and breaks down over time.
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.