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61,005 resultsShowing papers similar to Impact of Minerals (Ferrihydrite and Goethite) and Their Organo-Mineral Complexes on Fate and Transport of Nanoplastics in the Riverine and Terrestrial Environments
ClearImpactof Minerals(Ferrihydrite and Goethite) andTheir Organo-Mineral Complexes on Fate and Transport of Nanoplasticsin the Riverine and Terrestrial Environments
Researchers investigated how iron minerals ferrihydrite and goethite, along with their organo-mineral complexes, influence the mobility and transport of nanoplastics in riverine and terrestrial environments, finding that organic matter coatings substantially alter nanoplastic behavior compared to pure mineral phases.
Nanoplastics interaction with feldspar and weathering originated secondary minerals (kaolinite and gibbsite) in the riverine environment
Researchers studied how nanoplastics interact with common river minerals (feldspar, kaolinite, and gibbsite) in freshwater environments. Nanoplastics adsorbed onto mineral surfaces, with the type of mineral and water chemistry affecting how strongly they stuck. Understanding these interactions helps predict how nanoplastics move through rivers and how available they are to living organisms.
Influence of magnetite and its weathering originated maghemite and hematite minerals on sedimentation and transport of nanoplastics in the aqueous and subsurface environments
Researchers compared how three iron oxide minerals — magnetite, maghemite, and hematite — affect nanoplastic sorption and transport in aqueous and subsurface environments, finding that magnetite's smaller size, positive surface charge, and higher surface hydroxyl density make it the most effective at capturing nanoplastics and limiting their mobility in river water-saturated sand columns.
Charge mediated interaction of polystyrene nanoplastic (PSNP) with minerals in aqueous phase
Researchers investigated how polystyrene nanoplastics interact with common soil and sediment minerals, finding that positively charged iron oxide minerals (goethite and magnetite) strongly adsorb nanoplastics via electrostatic attraction and hydrogen bonding, while negatively charged clay minerals do not — providing mechanistic insight into how nanoplastics may accumulate in iron-rich soils and sediments.
Impact of iron/aluminum (hydr)oxide and clay minerals on heteroaggregation and transport of nanoplastics in aquatic environment
Researchers examined how polystyrene nanoplastics interact with nine different minerals in aquatic environments, finding that positively charged iron and aluminum (hydr)oxide minerals readily form aggregates with nanoplastics through electrostatic and hydrophobic forces, while humic acid and shifting pH significantly suppress this aggregation.
Deposition behaviors of carboxyl-modified polystyrene nanoplastics with goethite in aquatic environment: Effects of solution chemistry and organic macromolecules
Researchers systematically measured how pH, ions, and dissolved organic molecules affect the settling of carboxylated nanoplastics onto the iron mineral goethite, finding that higher pH, multivalent anions, and organic macromolecules (especially alginate) strongly inhibit deposition through electrostatic repulsion and steric hindrance.
Impact of particle size and oxide phase on microplastic transport through iron oxide-coated sand
Researchers studied how different types of iron oxide coatings on sand affect the movement of polystyrene microplastics through soil. They found that magnetite-coated sand retained the most microplastics, while goethite-coated sand retained the least, with results matching theoretical predictions. The findings suggest that naturally iron-rich soils could serve as effective barriers to prevent microplastic transport through groundwater systems.
Molecular Insights into the Synergistic Inhibition of Microplastics-Derived Dissolved Organic Matter and Anions on the Transformation of Ferrihydrite
Researchers investigated how dissolved organic matter released from microplastics combines with naturally occurring ions to affect iron mineral transformations in the environment. They found that microplastic-derived organic matter and ions like phosphate work together to strongly inhibit the conversion of a reactive iron mineral called ferrihydrite. The findings matter because these iron minerals play key roles in nutrient cycling and pollutant fate in soils and waterways.
Heterogeneous aggregation of microplastics and mineral particles in aquatic environments: Effects of surface functional groups, pH, and electrolytes
Researchers studied how microplastics clump together with soil and rock minerals in water, finding that positively charged minerals bound to plastic particles nearly three times more effectively than clay minerals, and that low pH and calcium ions dramatically accelerated aggregation. Understanding these dynamics helps predict where microplastics will settle or stay suspended in rivers, lakes, and aquifers.
Comparative effects of crystalline, poorly crystalline and freshly formed iron oxides on the colloidal properties of polystyrene microplastics
Researchers found that freshly formed iron oxides caused the greatest aggregation of polystyrene microplastics in water, with effects decreasing in the order: freshly formed iron oxide > ferrihydrite > goethite > haematite. The findings suggest that iron oxide copresence can delay microplastic transport or alter their environmental fate depending on pH and crystallinity of the mineral.
Interactions between Iron Minerals and Dissolved Organic Matter Derived from Microplastics Inhibited the Ferrihydrite Transformation as Revealed at the Molecular Scale
Researchers studied how dissolved organic matter released from degrading microplastics interacts with iron minerals in the environment. They found that this microplastic-derived organic matter inhibited the natural transformation of ferrihydrite, an important iron mineral in soil and water systems. The study reveals that microplastic breakdown products can alter fundamental geochemical processes, potentially affecting nutrient cycling and pollutant behavior.
Both nanoplastic and iron mineral types determine their heteroaggregation: Aggregation kinetics and interface process
Researchers measured how four types of nanoplastics aggregate with iron minerals and found that surface chemistry drives the outcome — with PMMA forming the strongest heteroaggregates and carboxyl-modified particles the weakest — and that electron transfer from nanoplastics to hematite partially reduces iron, with implications for aquatic iron cycling.
Fate and transport of nanoplastics in complex natural aquifer media: Effect of particle size and surface functionalization
Researchers used batch and column experiments in a natural sandy aquifer to show that nanoplastic transport is governed primarily by organic matter coatings rather than particle size or surface chemistry alone, with suspended organic matter increasing mobility while dissolved organic matter reduces it — findings that improve predictions of nanoplastic contamination in agricultural groundwater systems.
Adsorption of microplastic-derived organic matter onto minerals
Dissolved organic matter (DOM) released from weathered microplastics was studied for its adsorption onto soil minerals, a process relevant to microplastic fate and potential contaminant transport. Microplastic-derived DOM adsorbed onto mineral surfaces, altering soil chemistry and potentially stabilizing or mobilizing other contaminants in soil-water systems.
Nanoplastic in aqueous environments: The role of chemo-electric properties for nanoplastic-mineral interaction
Researchers studied how nanoplastics — plastic particles smaller than 1 micrometer — stick to common soil minerals underground, finding that simple electrical repulsion is less important than chemical bonding, metal ion bridging, and hydrogen bonds. Understanding these interactions is key to predicting how nanoplastics move through soil and contaminate groundwater.
Burial of microplastics in freshwater sediments facilitated by iron-organo flocs
Researchers found that iron-organo flocs in freshwater sediments facilitate the burial and long-term sequestration of microplastics by aggregating plastic particles with organic matter and iron minerals, identifying this aggregation mechanism as an important pathway controlling microplastic fate in lake sediments.
Transport of polystyrene nanoplastics in natural soils: Effect of soil properties, ionic strength and cation type
Researchers used column experiments across three soil types to show that polystyrene nanoplastic transport is governed by soil iron and aluminum oxide content and pH — with high-pH, low-oxide soils allowing up to 97% nanoplastic passage — and that calcium ions and higher ionic strength significantly increase retention, revealing that soil chemistry strongly controls nanoplastic mobility toward groundwater.
Unveiling the crucial role of iron oxide transformation in simultaneous immobilization of nanoplastics and organic matter
Researchers tracked how nanoplastics become trapped during the transformation of dissolved iron into crystalline iron oxide minerals, finding that polystyrene nanoplastics become physically encased within forming crystals while humic acid stabilizes the system, creating a durable iron oxide-nanoplastic-organic matter composite that sequesters particles in sediments.
Sediment organic carbon dominates the heteroaggregation of suspended sediment and nanoplastics in natural and surfactant-polluted aquatic environments
Researchers found that sediment organic carbon plays a dominant role in the heteroaggregation of nanoplastics with suspended sediment particles, with surfactant pollution altering aggregation dynamics and influencing the environmental transport and fate of nanoplastics in aquatic systems.
Heteroaggregation of PS microplastic with ferrihydrite leads to rapid removal of microplastic particles from the water column
Researchers investigated heteroaggregation between polystyrene microplastics and ferrihydrite iron mineral particles, finding that this aggregation process leads to rapid removal of microplastic particles from the water column, with implications for understanding microplastic fate and transport in natural water systems.
Crystallinity- dependent heteroaggregation and co-sedimentation between polystyrene nanoplastics and iron (hydro)oxides
Researchers found that the crystallinity of iron (hydro)oxide minerals strongly governs their tendency to aggregate with polystyrene nanoplastics in water — higher crystallinity produces more positive surface charges, stronger electrostatic attraction, and greater hydrogen bonding with nanoplastics, ultimately controlling how and where these combined particles settle in aquatic environments.
Nanoplastic adsorption characteristics of bisphenol A: The roles of pH, metal ions, and suspended sediments
Researchers found that nanoplastics adsorb bisphenol A through electrostatic, pi-pi stacking, and hydrophobic interactions, with adsorption capacity influenced by pH, competing metal ions, and suspended sediments, highlighting nanoplastics as vectors for BPA transport in aquatic environments.
Microplastics and Nanoplastics in Aquatic Environments: Aggregation, Deposition, and Enhanced Contaminant Transport
This review examined the aggregation, deposition, and transport of microplastics and nanoplastics in aquatic environments, synthesizing how particle properties and water chemistry govern their fate and mobility in rivers, lakes, and oceans.
Mechanism comparisons of transport-deposition-reentrainment between microplastics and natural mineral particles in porous media: A theoretical and experimental study
Researchers compared the transport, deposition, and re-entrainment behavior of microplastic particles versus natural mineral particles in porous media, finding key differences driven by density, surface charge, and shape that affect how microplastics migrate through soils and sediments.