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Magnetically recyclable flake-like BiOI-Fe3O4 microswimmers for fast and efficient degradation of microplastics
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Researchers developed a magnetically recyclable BiOI-Fe3O4 microswimmer capable of degrading polystyrene microplastics in water. The self-propelled device successfully broke down 64% of microplastics within 120 hours under visible light, offering a promising approach for removing small microplastics that pass through conventional water treatment filtration systems.
Microplastics ubiquitously in the environment endanger both marine organisms and human beings. Currently, the smaller sizes of microplastics in size ranging from 1 µm to 10 µm are likely to pass through the filtration systems in water treatment facilities and present in the drinking water supply. This study proposes a promising method of degrading the 1.1 µm polystyrene latex (PSL) beads microplastics using a self-propelled and magnetically recovered BiOI-Fe3O4 microswimmer. The results reveal flake-like BiOI-Fe3O4 microswimmer successfully degrades 64% polystyrene microplastics in 120 h and reduces the concentration of microplastics in an aqueous solution from 0.05 g/L to 0.018 g/L. The presence of visible light and H2O2 fuel induced the movement of the microswimmer by the decomposition of H2O2 into oxygen bubbles. It is observed that the microswimmer with the mean particle size of 3.913 µm can move at a reasonable speed of 3.0498 µm/s in 5 wt% H2O2 concentration under 3.6 W visible light irradiation. It can be concluded that PSL degrades rapidly when exposed to visible light for less than 24 h.
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In lab tests, tiny magnet-driven particles captured and broke down polystyrene micro/nanoplastics in water, converting about 60% into benzoic acid. The particles also allowed sensitive detection of the plastics and worked across different water samples, with researchers reporting the approach was economically feasible using cost and environmental impact analysis.
Microplastic Remediation in Aqueous Systems via TiSiO4–Fe3O4 Microbots
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TiSiO4–Fe3O4 photocatalytic microswimmers were deployed in water to self-propel under light exposure and degrade microplastics, demonstrating efficient removal of plastic contamination from aqueous systems without energy-intensive filtration.
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Researchers developed novel MoS2-Fe2O3 micromotors that use light-driven motion to capture and degrade polystyrene microplastics in water. The micromotors demonstrated schooling behavior under solar light and achieved significant microplastic removal without requiring chemical fuel, suggesting a promising approach for environmental microplastic remediation.
Removal of microplastics from water by magnetic nano-Fe3O4
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Researchers developed a method for removing microplastics from water using magnetic iron oxide nanoparticles that attach to plastic surfaces, allowing the particles to be pulled out with a magnet. The technique achieved removal rates above 80% for common microplastic types in environmental water samples including river water, sewage, and seawater, suggesting a practical approach for water treatment.
Micromotors of MnO2 for the Recovery of Microplastics
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Researchers synthesized manganese dioxide (MnO2) particles and demonstrated that these self-propelled micromotors can effectively capture polystyrene microplastics from water through physical adsorption. This offers a promising approach for microplastic removal from aquatic environments without additional chemicals.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.