Themed collection Environmental fate of nanomaterials

FRAME: Framework for Relevance And Methods Evaluation.

Nanoparticles containing metals in their structure constitute an increasingly large group of substances present in the air.

Formation and transformation of silver sulfide nanoparticles occur in both engineered and natural water systems with potential toxic effects to aqueous organisms.

Capturing nanoparticle retention in 4D via ex situ μ-CT.

The surface properties of graphene-based materials determine their protein-binding capacities via modulating the aggregation morphology of these materials.

This study demonstrates that PBDEs attached to soil nanoparticles can be highly mobile in saturated porous media, providing important insights on risk assessment of PBDEs contamination.

Aqueous stability and sorption affinity (towards target environmental contaminants) of engineered nanoparticles, composed of inorganic nanoparticles and surface stabilizers, are dependent on surface grafting density.

This study demonstrates that sub-100 nm nanoplastics have a significantly greater capacity for tributyltin adsorption, raising concerns that small nanoplastics may remobilise existing TBT pollution, rendering it more available to marine organisms.

The stability of a model environmental nanomineral, colloidal hematite (α-Fe₂O₃) nanoparticles, can be strongly affected by environmentally-relevant levels of quaternary ammonium surfactants, a surfactant present in ubiquitous daily-use household products.

NH₃ is oxidized into NO₃⁻ in the heterogeneous reactions on the surface of nano α-Fe₂O₃ and results in iron dissolution.

Three different Co(II) species are identified at the surface of stoichiometric magnetite (Fe(II)/Fe(III) = 0.5) by experiments, modeling, X-ray absorption spectroscopy, and X-ray magnetic circular dichroism. This affects the fate of Co, and the magnetic properties of the nanoparticles.

The fate and impact of silver nanowires incorporated in a paper-based nano-enabled product (NEP) was investigated in freshwater mesocosms.

The Fe(III)/Fe(II) cycle together with newly formed EPFRs and H₂O₂ can cause microplastic degradation in ice.

The first investigation that describes the adsorption capacity of natural colloids by solid soil media, and studies their interaction mechanism in the molecular-scale.

Simplified conceptualization of various Cd fractions binding on the goethite surface under different pH/sulfate conditions.

Morphological competition between silver nanoparticles evolves under air exposure mainly due to temperature effects and interactions with surface contaminants.

The adsorption and cleavage behavior of DNA molecules by graphene oxide under UV irradiation were investigated in detail. It will provide novel insights into the potential environmental risk of graphene oxide in the aquatic environment.

The heterogeneous reactions of NH₃ on TiO₂ were comprehensively investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and a flow tube reactor.

This study improves the understanding of ZnO NP transformation and Zn behavior in redox-dynamic slightly alkaline freshwater sediments.

Nano- and microplastics exist in the environment and atmosphere in mixed-phase aqueous systems. The density and size of plastics as well as the density of the liquid phase determines if these plastics will float or diffuse through the liquid.

Al-substitution in Fe oxides increased the sorption of aromatic C, which was dominantly bound to the outer layer of the organo–mineral interfaces as the carboxyl C was preferentially sorbed onto the surfaces of Fe oxides.

The capacity of Fe(OH)₂ to reduce H₂O was limited by the predominant distribution of inert (001) facet and high energy barrier of H₂O dissociation on acitive (100) facet.

The widely present proteins in the natural environment interact with released nanoparticles, which changes the stability, transport, and fate of nanoparticles.

The formation of environmentally persistent free radicals (EPFRs) is highly correlated with the structure of mineral crystal surfaces.

Magnetite nanoparticles are not chemically stable at pH < 7, which drastically affects their environmental behavior.

The coprecipitation or surface adsorption of dissolved organic matters determined the colloidal stabilities and deposition behaviors of Cr (hydr)oxides.

The ubiquitous presence of submicron-sized black carbon (BC) in the water environment makes it inevitably interact with root surfaces of aquatic plants.

The presence of nanoplastics in the ocean and soil demonstrates their global distribution in the environment.

Enrichment of aluminum(III) in hematite with different crystal faces.

The study reveals that the interaction with cations, colloidal stability and transport behavior of MoS₂ rely on its phase compositions and geometric structures.

Oxalate promoted iron dissolution of hematite via proton coupled electron transfer.

This study provides nanoscale and molecular-scale evidence that the formation, stability, and transport of NOM–Cr(III) colloids depend on the C/Cr ratio and NOM source.

Lepidocrocite, as a ubiquitous iron mineral, is widely detected in different morphologies in natural environments, controlling the mobility and availability of heavy metal ions (HMIs).

The observations of organo-clay-calcite interactions through combined mineral reactions in soil systems would provide a new perspective of carbon stabilization.

We designed nanoparticles able to protect the elicitor on the leaves of grapevines over long periods of time. The foliar application of this nanoelicitor produced wines with high content of stilbenes at significantly reduced dosages.

Investigation of the natural coatings on nanoparticles in surface waters (using dialysis bags), and evaluation of the influential parameters of surface waters on the formation of these coatings.

Dispersion of BPNSs was stabilized by crop root exudate fractions _{>3 kDa}, resulted from ecological corona hindering their connections with other BPNSs and electrolyte (Ca²⁺).

Functional nanoplastics (PSFG) complexed with glyphosate (PMG) are occluded within the model minerals calcite and iron hydroxide through growing hillocks and particle aggregation, respectively, thus limiting their soil migration and plant uptake.

Synchrotron X-ray absorption spectroscopy analysis of high arsenic Guizhou coal samples reveals stable nano-aggregates of As(V) bound through edge-sharing with Fe(III)-oxyhydroxide within an organic matter matrix.

Leaching of organic carbon enhances the mobility of biochar nanoparticles in saturated porous media due to alleviated particle deposition via cation bridging.

A dual radiolabelling strategy was used to track CeO₂ NPs in freshwater shrimp showing a dissolution-based uptake pathway of cerium.

The aggregation of two sizes of nanosized plastic particles in aquatic environments was different in the presence of proteins with various electrical characteristics and concentrations.

Exposing ceria nanoparticles to high arsenite concentrations will trigger aggregation and settling, while lower concentrations promote dissolution through redox interactions.

By incorporating discrete representative nanoscale heterogeneity (DRNH) on simulated surfaces, we constrained the scales and prevalence of nanoscale heterogeneity relevant to particle transport and retention in environmental granular media.

Inorganic salts (NaCl and CaCl₂) and organic material (humic acid and extracellular polymeric substances) have differing effects on the aquatic stability and photocatalytic activity of structurally different MoO₃ materials.

Solubility of neptunium dioxide decreases as microstructure grain size increases, likely due to decreasing surface free energy and surface area.

Calcium drives the structural transitions of iron–organic matter associations from colloidal aggregates to a non-colloidal micrometric network, subsequently controlling their mobility and the iron surface reactivity.

Formation and transformation of schwertmannite through direct Fe³⁺ hydrolysis were systematically explored under various geochemical conditions.

Nanocrystalline NpO₂(s) dissolves preferentially at grain boundaries, producing aqueous and colloidal neptunium. Dissolution mechanisms may impact the environmental fate of NpO₂(s) in legacy radioactive waste management.

The geochemical cycling of iron and carbon can couple in unique ways in the euphotic zone of aquatic systems.

This study used stable isotope-labeled copper oxide nanoparticles (⁶⁵CuO NPs) to determine their trophic transfer potential from sediment to worms to fish at environmentally realistic exposure doses and compared to dissolved Cu (⁶⁵CuCl₂).

Few standardized methods and reference systems have been established for evaluating the behavior of engineered nanomaterials in complex media like natural soils.

Research has focused on nanoparticle (NP) aggregation and transport behavior in saturated granular porous media, but few studies have looked at the effect that temperature variability associated with winter conditions will have on engineered NPs.

Soluble Fe(III)–As(V) complexes were found at both acidic and neutral conditions, which significantly change the solubility of ferric oxides.

Mineral carbonation reactivity trends and thresholds in nanoconfined water films delineated with in situ X-ray diffraction and molecular simulations.

Aggregation mode mediated by protonation and metal cations.

Ferrihydrite is ubiquitous in natural environments, and its transformation significantly influences the fate of heavy metals.

A new analytical approach for environmental tracing of iron nanoparticles used for nanoremediation has been developed. The methodology is based on ICP-MS analysis of the elemental signature of the nanoparticles.

Sensitivity analyses indicate attachment efficiency and transformation rate constant are most important in modeling environmental fate of engineered nanoparticles.

The incineration of sewage sludge leads to the incorporation of Ce from CeO₂ nanoparticles into mineral structures.

We discovered a new mechanism explaining why iron in its oxidized form Fe(III) in clay minerals is reactive only in the presence of trace amounts of its reduced form—Fe(II).

Hematite is one of the most important components in atmospheric mineral aerosols, which always presents different morphologies due to its different formation processes and various sources.

Silver ions can be naturally transformed into silver nanoparticles due to the plant root exudate-mediated photoreduction of silver chloride microcubes.

This study is among the first to reveal nZVI aging in the soil ecosystem and its interactions with the soil microbial community.

We, at nanoscale, demonstrated a visualized description of ferrihydrite transformation to crystalline Fe oxides under the impact of Pb and HA.

It is vital to assess the behavior of quantum dots in different environmental media to determine their environmental impacts and potential health risks.

Sequential exposure of silver nanoparticle suspensions to various media gives new insight to the environmental fate of nano-enabled consumer products.

This study looks at the potential for ingested nanomaterials dosed in soil, to become bioaccessible for human intestinal absorption.

NOM coating enabled stabilization of BPs in CaCl₂ solutions via steric repulsion and isolating Ca²⁺ ions from interaction with BPs.