We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
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.
Polyethylene (PE) agricultural soil films are easily embrittled and decomposed to microplastics (MPs) in environment. As widely used pesticides in vegetable farmland, carbendazim, dipterex, diflubenzuron, malathion, difenoconazole have potential environmental and human safety risks. They are often coexisting with MPs in the environment, and may cause consequential pollution to the ecosystem. Studying the adsorption behavior between pesticides and PE agricultural soil films MPs would be helpful for the risk assessment of co-exposure of pesticides and MPs. Herein, a systematic study on batch adsorption experiments was performed to determine the adsorption process of pesticides on MPs, the environmental factors on adsorption capacity were evaluated, and the adsorption mechanisms were discussed. Results suggested that all these five pesticides can adsorb on MPs, especially for diflubenzuron and difenoconazole. The adsorption kinetics and isotherm fitted to the Pseudo-second-order and Freundlich model, respectively, indicating that besides the adsorption onto surface sites, mass transfer and intraparticle diffusion were involved in the adsorption process, and the adsorption process was mostly controlled by physical and chemical interactions. The adsorption amounts of 5 pesticides on PE MPs follow the order of DIF > DIFE > MAL > CAR > DIP with K correlated positively with octanol-water partition coefficients (LogK). The thermodynamic study indicates the adsorption of all pesticides as spontaneous and exothermic processes. The results of this study illustrated that PE MPs can be a good carrier of pesticides in agricultural field.
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.
Distinct interferences of conventional and biodegradable microplastics on adsorption of pesticide mixture in agricultural soils
AI summary Read the abstract
Researchers examined how conventional and biodegradable microplastics alter pesticide adsorption dynamics in agricultural soils, finding that the surface properties of microplastics — particularly their affinity coefficients — were the dominant factor governing pesticide fate, introducing significant complexity and uncertainty into predictions of pesticide environmental risk.
A comparative study on the adsorption behavior and mechanism of pesticides on agricultural film microplastics and straw degradation products
AI summary Read the abstract
Researchers compared how agricultural film microplastics and straw-derived cellulose particles adsorb pesticides in farmland soils, finding that both materials sorb pesticides but through different mechanisms, with microplastics showing higher affinity for hydrophobic compounds, potentially altering pesticide mobility and bioavailability.
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.
Sorption of pesticides onto polyethylene microplastics in different aqueous matrices
AI summary Read the abstract
This thesis examined how pesticides adsorb onto polyethylene microplastics in different aqueous matrices, finding that water chemistry significantly affects the binding behavior and potential for microplastics to carry agricultural chemicals.
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.