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61,005 resultsShowing papers similar to New insights into the adsorption behavior of thiacloprid at the microfibers/water interface: Role of humic acid
ClearAdsorption of typical natural organic matter on microplastics in aqueous solution: Kinetics, isotherm, influence factors and mechanism
Researchers investigated humic acid adsorption onto PVC and PS microplastics, finding that pH, ion species, particle size, and surfactants significantly influenced adsorption capacity through mechanisms including halogen bonding, hydrogen bonding, and pi-pi interactions.
The influence of humic and fulvic acids on polytetrafluoroethylene-adsorbed arsenic: a mechanistic study
Researchers investigated how PTFE microplastics adsorb arsenic in water in the presence of humic and fulvic acids, finding that humic acid forms π-complexes with PTFE that increase oxygen-bearing surface functional groups, substantially enhancing arsenic adsorption through hydrogen bonding and pore-filling mechanisms.
The role of humic substances’ hydrophobicity in heterogeneous adsorption onto microplastics: Insights from two-dimensional correlation hydrophilic interaction chromatography
Researchers investigated how the hydrophobic properties of humic substances influence their adsorption onto pristine and aged polyethylene microplastics. Using chromatography techniques, they found that more hydrophobic humic molecules preferentially adsorb onto microplastics, with this trend being stronger for aged plastics and under acidic conditions. The study highlights the critical role of hydrophobicity in determining how natural organic matter interacts with microplastics in aquatic environments.
Biofilms Enhance the Adsorption of Toxic Contaminants on Plastic Microfibers under Environmentally Relevant Conditions
Researchers grew natural biofilms on plastic microfibers under realistic environmental conditions and measured changes in adsorption of two toxic contaminants, finding that biofilm formation substantially increased the fibers' capacity to bind pollutants, amplifying their potential as chemical vectors.
Comparing the adsorption of methyl orange and malachite green on similar yet distinct polyamide microplastics: Uncovering hydrogen bond interactions
Researchers compared how two polyamide microplastic types adsorb anionic and cationic dyes in aquatic environments, finding that hydrogen bonding is the primary interaction mechanism. The study revealed that polyamide 6 formed more hydrogen bonds with dyes than polyamide 66, resulting in higher adsorption capacity, and that pH strongly influenced which dye dominated in competitive adsorption scenarios.
Natural Organic Matter Decreases the Sorption Capacityof Fipronil and Its Degradation Products onto Polyethylene Microplastics:Combined Experimental and Theoretical Insights
Researchers assessed the sorption behavior of the insecticide fipronil and its degradation products onto polyethylene microplastics in the presence of natural organic matter (NOM) using combined kinetic experiments and computational modeling. They found that dissolved NOM substantially reduced the sorption capacity of microplastics for fipronil compounds by competing for hydrophobic binding sites on the polymer surface.
Adsorption mechanism of two pesticides on polyethylene and polypropylene microplastics: DFT calculations and particle size effects
Researchers studied how two common pesticides, carbofuran and carbendazim, adsorb onto polyethylene and polypropylene microplastics using both experiments and computational chemistry. They found that the type and size of microplastic particles significantly influenced how much pesticide was absorbed, with smaller particles binding more chemicals per unit weight. The study reveals that microplastics in agricultural environments can act as carriers for pesticides, potentially increasing their transport into waterways.
Surface functional group dependent enthalpic and entropic contributions to molecular adsorption on colloidal microplastics
This chemistry study measured how different organic molecules (charged and neutral) stick to the surface of various microplastic particles in water, finding that the plastic's surface chemistry strongly influences the strength and nature of these interactions. The work reveals that both electrostatic attraction and water structure at the plastic surface play a role in determining what contaminants microplastics can carry. This matters because microplastics act as "carriers" for other pollutants, and understanding the binding chemistry helps predict which toxins hitchhike with plastics into ecosystems and organisms.
Application of Humic and Fulvic Acids as an Alternative Method of Cleaning Water from Plant Protection Product Residues
Humic and fulvic acids were tested as natural sorbents to remove pesticide residues from water, offering an alternative to synthetic chemical treatments. Lab experiments showed both substances could adsorb certain plant protection products from solution. The study suggests these naturally occurring compounds have potential as low-cost, eco-friendly water purification agents.
Benzo[a]pyrene and heavy metal ion adsorption on nanoplastics regulated by humic acid: Cooperation/competition mechanisms revealed by molecular dynamics simulations
Researchers used molecular dynamics simulations to investigate how humic acid regulates the adsorption of the carcinogen benzo[a]pyrene and copper ions onto nanoplastics. They found that polystyrene nanoplastics had the highest capacity for adsorbing the carcinogen, while humic acid formed eco-coronas on nanoplastic surfaces that both hindered direct pollutant binding and created new binding sites for metal ions. The study reveals cooperation and competition mechanisms that govern how nanoplastics interact with multiple contaminants in aquatic environments.
A comparative study on the adsorption behavior and mechanism of pesticides on agricultural film microplastics and straw degradation products
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.
Sorption of pesticides onto polyethylene microplastics in different aqueous matrices
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.
Adsorption behavior of triclosan by different microplastics and the impact of water chemistry
Researchers investigated how triclosan — an antimicrobial compound — adsorbs onto four types of microplastics under varying water chemistry conditions. They found hydrophobic partitioning was the dominant adsorption mechanism, with solution pH, ionic strength, and dissolved organic matter all influencing uptake capacity.
Adsorption behaviors of atrazine and imidacloprid on high temperature aged microplastics: Mechanism and influencing factors
Researchers investigated how aged polyethylene microplastics — the kind that have been weathered by UV light and heat in the environment — adsorb common agricultural pesticides, finding that microplastics can accumulate pesticides like atrazine and imidacloprid at high concentrations through hydrophobic (water-avoiding) interactions. This "Trojan horse" effect means microplastics can carry and potentially concentrate pesticides as they move through water environments.
Natural Organic Matter Decreases the Sorption Capacity of Fipronil and Its Degradation Products onto Polyethylene Microplastics: Combined Experimental and Theoretical Insights
Researchers examined how natural organic matter (NOM) affects the sorption of the insecticide fipronil and its degradation products (fipronil sulfone and fipronil sulfide) onto polyethylene microplastics in both ultrapure and river water using kinetic experiments and computational modeling. They found that NOM substantially decreased sorption capacity by competing for binding sites on the microplastic surface, with theoretical insights confirming the competitive displacement mechanism.
Sorption behaviour of tebuconazole on microplastics: kinetics, isotherms and influencing factors
Researchers investigated the adsorption of tebuconazole fungicide onto polyamide, polystyrene, and polypropylene microplastics, finding polyamide had the highest sorption capacity and that pH, salinity, and metal presence all significantly affected adsorption. The dominant mechanisms differed by polymer type, with electrostatic and hydrogen bonding governing polyamide and polypropylene while hydrophobic and intermolecular forces dominated polystyrene.
Interaction dynamics of agricultural fungicides at water-nanoplastics interfaces and the effects of dissolved natural organic matter
Scientists found that common farm fungicides stick to tiny plastic particles (nanoplastics) that end up in our water supply, with some fungicides binding much more strongly than others. When natural organic matter from plants is present, it can reduce how much fungicide sticks to the plastic particles. This matters because it helps us understand how these chemical combinations might move through our environment and potentially affect drinking water quality.
Impact of microalgal biomass and microplastics on the sorption behaviour of pesticides in soil: a comparative study
Researchers examined how microalgal biomass interacts with microplastics to influence pesticide sorption behavior, finding that algal exudates coating MP surfaces altered their affinity for pesticides and affected the overall fate of pesticide-MP complexes in water.
New insights into the distribution and interaction mechanism of microplastics with humic acid in river sediments
Researchers found that microplastics and humic acids interact significantly in river sediments, with humic acid coating altering microplastic surface properties and affecting their distribution at different sediment depths, influencing the environmental fate and pollutant-carrying capacity of microplastics.
Adsorption behavior and mechanism of five pesticides on microplastics from agricultural polyethylene films
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.
Cation-π mechanism promotes the adsorption of humic acid on polystyrene nanoplastics to differently affect their aggregation: Evidence from experimental characterization and DFT calculation
Researchers investigated how humic acid and metal ions in natural lake water affect the clumping behavior of polystyrene nanoplastics, finding that a cation-π bonding mechanism — where metal ions bridge humic acid molecules onto the nanoplastic surface — governs whether particles aggregate or remain dispersed, with major implications for their environmental persistence and toxicity.
Further research on the impacts of humic acid in the aggregation of nanoplastics: The roles of molecular weight and surface functionalization
Researchers studied how humic acid — a natural compound found in soil and water — coats nanoplastic particles and changes how they clump together, finding that larger humic acid molecules create thicker coatings that keep nanoplastics suspended and dispersed rather than settling. This matters because dispersed nanoplastics travel farther through water systems and are more likely to be ingested by organisms.
Interaction between microplastics and humic acid and its effect on their properties as revealed by molecular dynamics simulations
Researchers used molecular dynamics simulations to study how microplastics interact with humic acid, a natural organic compound found in soil and water. They found that microplastics disrupted the hydrogen bonding and calcium coordination within humic acid, altering its structure and properties. The study suggests that when microplastics and humic acid combine in the environment, both materials behave differently than they would alone, which could affect pollutant transport in natural systems.
Effects of humic acid on Pb2+ adsorption onto polystyrene microplastics from spectroscopic analysis and site energy distribution analysis
Researchers investigated how humic acid (HA) affects the adsorption of lead ions onto polystyrene microplastics, finding that higher HA concentrations promoted greater lead adsorption by acting as a bridging molecule between the plastic surface and the metal. Spectroscopic analysis confirmed that HA introduced additional adsorption sites and enhanced the surface affinity of the microplastics for lead.