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61,005 resultsShowing papers similar to Heavy metal remediation by nano zero-valent iron in the presence of microplastics in groundwater: Inhibition and induced promotion on aging effects
ClearHow Do Micro‐ and Nanoplastics (MNPs) Affect Contaminant Removal by Nano Zero‐Valent Iron (nZVI) in Water and Soil?: A Review
This review examines how microplastics and nanoplastics interfere with nano zero-valent iron (nZVI), a widely used material for cleaning up contaminated groundwater and soil, finding that plastic particles typically reduce nZVI's effectiveness by clogging reactive sites and causing premature aging. The finding matters because it suggests that microplastic contamination at remediation sites could undermine cleanup efforts for other pollutants like heavy metals and organic compounds, requiring modified iron formulations (such as sulfidated nZVI) to maintain performance.
Distinctive adsorption and desorption behaviors of temporal and post-treatment heavy metals by iron nanoparticles in the presence of microplastics
Microplastics inhibited adsorption of most heavy metals by nano-zero-valent iron and facilitated their desorption during post-treatment, with the effect primarily affecting metals binding through surface complexation or electrostatic interaction rather than metals involved in redox reactions, providing insights for improved contaminated site remediation.
Environmental remediation approaches by nanoscale zero valent iron (nZVI) based on its reductivity: a review
This review covers how nanoscale zero-valent iron particles can be used to clean up contaminated wastewater through chemical reduction of pollutants like heavy metals and organic compounds. While not directly about microplastics, these remediation technologies are relevant because they represent advanced approaches to treating the kinds of contaminated water that often also contains microplastic pollution.
The influence of various microplastics on PBDEs contaminated soil remediation by nZVI and sulfide-nZVI: Impedance, electron-accepting/-donating capacity and aging
PVC, PS, and PP microplastics in contaminated soil inhibited the degradation of the brominated flame retardant BDE209 by nano-zero-valent iron and sulfided nZVI to varying degrees, with inhibition linked to microplastic impedance and electron-accepting capacity, while microplastics themselves showed aging and fragmentation during the remediation process.
Remediation of Micropalstic-heavy Metal Cocontaminated Soils Using Nanoscale Zero-valent Iron Supported on Palygorskite: Mechanisms and Effectiveness
Researchers developed a remediation approach for soils co-contaminated with microplastics and heavy metals using nanoscale zero-valent iron supported on palygorskite. The composite material effectively inhibited microplastic migration in soil and reduced heavy metal mobility, with the microplastic content in deeper soil layers remaining at only about 8% of initial levels after treatment.
Improved Cadmium Removal Induced by Interaction of Nanoscale Zero-Valent Iron and Microplastics Debris
Researchers investigated how PVC microplastics interact with nanoscale zero-valent iron used to remove cadmium from contaminated water. The presence of microplastics actually enhanced cadmium removal, likely due to adsorption on the plastic surface. These findings are relevant because PVC production uses cadmium compounds, meaning both pollutants may co-occur in real environments.
Study on the Adsorption Behavior and Mechanism of Heavy Metals in Aquatic Environment before and after the Aging of Typical Microplastics
Researchers investigated the adsorption behavior and mechanisms of heavy metals by typical microplastics before and after environmental aging, finding that aging significantly alters microplastics' surface properties and capacity to bind metals such as cadmium and lead in aquatic systems.
Deciphering the Role of Heavy Metals in Zero-Valent Iron-Driven Dechlorination of PVC Microplastics under Mild Condition
Researchers demonstrated that nanoscale zerovalent iron facilitates aging and dechlorination of PVC microplastics under mild anaerobic conditions, with heavy metals modulating efficiency — nickel and copper promoted dechlorination through electron transfer enhancement while chromium inhibited the process. The dechlorination efficiency followed a ranking of Ni > Cu > Co > Cr based on their distinct effects on active iron phase formation.
Efficiency and mechanism of micro- and nano-plastic removal with polymeric Al-Fe bimetallic coagulants: Role of Fe addition
Researchers investigated polymeric Al-Fe bimetallic coagulants for removing micro- and nanoplastics from drinking water, finding that iron addition enhanced nanoplastic removal efficiency through improved charge neutralization and floc formation mechanisms.
Study on Adsorption of Heavy Metals Cu and Zn by Microplastics Under Different Aged Factors
Researchers examined how aging of polyethylene microplastics under different conditions -- varying pH, dissolved organic matter, and hydrogen peroxide -- affects their adsorption of Cu and Zn, finding that H2O2-induced aging most strongly enhanced heavy metal sorption capacity.
Insight into the interactions between microplastics and heavy metals in agricultural soil solution: adsorption performance influenced by microplastic types
Environmental-simulating microplastics (aged under environmental conditions) showed higher cadmium and chromium adsorption capacity than commercial microplastics in agricultural soil solutions, with surface oxidation increasing adsorption—suggesting that aged microplastics are more effective co-transporters of heavy metals in contaminated agricultural soils.
Microplastics and other pollutants in the aquatic environment: study of interactions and new removal strategies
Researchers evaluated iron magnetic nanoparticles (MNPs) with varying surface modifications -- bare Fe3O4, TEOS-coated, and TEOS+MPS-coated -- for removing four types of microplastics (Nylon 6, PTFE at two sizes, and PMMA) from water, assessing how surface chemistry and synthesis time affect removal efficiency.
Retention of ZnO nanoparticles onto polypropylene and polystyrene microplastics: Aging-associated interactions and the role of aqueous chemistry
Researchers investigated how zinc oxide nanoparticles attach to polypropylene and polystyrene microplastics under different water chemistry conditions. They found that UV-aged microplastics retained significantly more nanoparticles than fresh ones, and water pH and natural organic matter influenced the interaction. The study suggests that weathered microplastics in the environment are more effective at carrying metal contaminants, potentially increasing ecological risks.
Deciphering theRole of Heavy Metals in Zero-ValentIron-Driven Dechlorination of PVC Microplastics under Mild Condition
Researchers demonstrated that nanoscale zerovalent iron can effectively dechlorinate PVC microplastics under mild anaerobic conditions, with heavy metals playing a critical modulating role — nickel and copper promoted dechlorination while chromium significantly inhibited it. The dechlorination efficiency ranking of Ni > Cu > Co > Cr reflects differences in electron transfer promotion and active iron phase formation.
Peer Review #2 of "Zero-valent iron nanoparticles for environmental Hg (II) removal: a review (v0.2)"
Not relevant to microplastics — this is a peer review document for a paper on using zero-valent iron nanoparticles to remove mercury contamination from soil and water environments.
Influence of microplastic aging on the adsorption and desorption behavior of Ni(II) under various aging conditions
This study examined how aging processes like freezing, wetting, and chemical exposure change the ability of microplastics to pick up and release the heavy metal nickel. Aged microplastics absorbed more nickel than fresh ones, which matters because weathered plastics in the environment may carry higher loads of toxic metals that could eventually enter the food chain and affect human health.
How aging microplastics influence heavy metal environmental fate and bioavailability: A systematic review
This systematic review found that environmental aging (UV, weathering) degrades microplastics into smaller particles with higher surface reactivity, increasing their capacity to adsorb heavy metals. These aged microplastic-heavy metal complexes bioaccumulate through the food chain, posing greater ecological and human health risks than either pollutant alone.
Driving synergistic Fe-N-Plastic co-metabolism and functional microbial symbiosis via nZVI@RA for enhanced decontamination in constructed wetlands
Researchers developed a recycled aggregate-supported nano-zero valent iron material (nZVI@RA) and demonstrated that it profoundly reshapes microbial communities in constructed wetlands to enhance synergistic iron, nitrogen, and nanoplastic co-metabolism, improving simultaneous decontamination performance.
Remediation strategies for micro/nanoplastic pollution using magnetic nanomaterials
This review surveys recent developments in using magnetic nanomaterials, such as iron oxide nanoparticles and magnetic composites, to remove micro- and nanoplastics from water and soil. These materials can capture plastic particles through adsorption, help clump them together for removal, or even break them down, and they can be magnetically recovered for reuse. The study highlights that magnetic nanomaterials offer a promising approach for cleaning up plastic pollution, though challenges remain in scaling up for real-world use.
Chemical reactivity of weathered nanoplastics and their interactions with heavy metals
Researchers examined the chemical reactivity of weathered nanoplastics following abiotic and biotic degradation processes, finding that weathering substantially alters the surface chemistry of nanoplastics and enhances their capacity to interact with and facilitate the transformation of legacy heavy metal contaminants in the environment.
Microplastics aged in various environmental media exhibited strong sorption to heavy metals in seawater
Researchers aged six types of microplastics — including polyamide and PET — in different environments and then measured their adsorption of heavy metals in seawater, finding that aging consistently increased metal sorption capacity and that environmental medium during aging strongly influenced the degree of surface modification.
Modulating oxidative capacity to simultaneously enhance microplastics aging and reduce adsorption performance: A novel approach to environmental remediation
Researchers developed a method that modulates oxidative capacity during microplastic aging to simultaneously generate oxygen-containing surface groups—which increase pollutant adsorption—while degrading the plastic particles, combining aging and degradation in a single process.
Mini review on the application research of nanoscale zero valent iron in water treatment
This mini-review covers nanoscale zero valent iron (nZVI) particles as tools for environmental pollution control, capable of adsorbing and chemically reducing heavy metals and organic contaminants in water. These nanomaterials are also being explored for microplastic removal and the breakdown of plastic-associated chemical pollutants in water treatment.
Sulfidated Nanoscale Zero-Valent Iron (S-nZVI) Facilitates Remediation and Safe Crop Production in Cr(VI) and Microplastics Co-contaminated Soil
Researchers tested sulfidated nanoscale zero-valent iron as a way to clean up agricultural soil contaminated with both chromium and microplastics. The treatment effectively reduced toxic chromium levels and helped trap microplastics, making it safer to grow crops in the contaminated soil. The study offers a promising approach for addressing the growing problem of combined heavy metal and microplastic contamination in farmland.