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Removal and Degradation of Microplastics Using the Magnetic and Nanozyme Activities of Bare Iron Oxide Nanoaggregates
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Researchers developed bare iron oxide nanoaggregates that both remove and catalytically degrade common microplastics with nearly 100% efficiency, achieving full extraction at just 1% of the microplastic mass through combined magnetic and nanozyme activities.
Removal and degradation of microplastics are often carried out separately. In this work, hydrophilic bare Fe3 O4 nanoaggregates allowed efficient removal of the most common microplastics including high-density polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyethylene terephthalate. Full extraction was achieved using Fe3 O4 at 1 % of the mass of microplastics. Hydrogen bonding is the main force for the adsorption of Fe3 O4 . Unlike the more commonly used hydrophobically modified Fe3 O4 nanoparticles, the bare Fe3 O4 benefitted from the peroxidase-like activity of its exposed surface, enabling further catalytic degradation of microplastics with nearly 100 % efficiency and easy recovery of the Fe3 O4 .
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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.