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Biohybrid Magnetically Driven Microrobots for Sustainable Removal of Micro/Nanoplastics from the Aquatic Environment
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Researchers developed biohybrid microrobots by coating biological cells with magnetic iron oxide nanoparticles, enabling them to capture and remove micro- and nanoplastics from water using magnetic steering. The microrobots effectively captured plastic particles through electrostatic interactions and could be collected with a magnet after use. The study presents an innovative and sustainable approach to cleaning up plastic pollution in aquatic environments.
Abstract The proliferation of micro/nanoplastics derived from the fragmentation of plastic waste released in the environment represents an increasingly alarming issue with adverse implications for aquatic ecosystems worldwide. Conventional approaches for mitigating such contamination are inadequate in removing plastic fragments with exceptionally tiny sizes. Therefore, it is highly urgent to develop efficient strategies to address the threats posed by micro/nanoplastics. Here, biohybrid microrobots, integrating the magnetic properties of Fe 3 O 4 nanoparticles, are investigated for the dynamic removal of micro/nanoplastics from various aquatic environments via high‐precision magnetic actuation and reliable electrostatic interactions. After the surface decoration with Fe 3 O 4 nanoparticles, algae cells can achieve precise locomotion and wireless manipulation by regulating an external magnetic field. Taking advantage of this active movement, magnetic algae robots (MARs) display considerable capture and removal efficiencies for micro/nanoplastics in water with extensive application scenarios. The reusability of MARs is also investigated, proving great recyclable performance. The growth and cell viability experiments elucidate that the presence of Fe 3 O 4 nanoparticles may result in hormesis stimulation of algae growth. Such recyclable microrobots with eco‐friendly and low‐cost characteristics offer an attractive strategy for sustainably tackling micro/nanoplastics pollution.
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Reconfigurable Magnetic Liquid Metal Microrobots: A Regenerable Solution for the Capture and Removal of Micro/Nanoplastics
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Scientists developed magnetically controlled liquid metal microrobots that can capture and remove micro- and nanoplastics from water. The tiny robots can change shape, be steered with magnets, and be regenerated for reuse, offering a potential new technology for cleaning plastic pollution from water sources before it reaches people.
Low-Energy Photoresponsive Magnetic-Assisted Cleaning Microrobots for Removal of Microplastics in Water Environments
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Researchers developed tiny light-powered magnetic microrobots that can actively seek out and collect microplastics from water, achieving 98% removal efficiency in under two minutes. The microrobots can be guided using magnetic fields and recovered for reuse, making the approach both effective and eco-friendly. This technology could eventually help clean microplastics from water sources before they reach people, though it is still at the laboratory stage.
Sustainable Magnetic Nanorobots for Microplastics Remediation
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This review highlights how magnetically controlled nanorobots — functionalized with hydrophobic coatings, biochar, and carbon-based materials — can remove microplastics from water with efficiencies exceeding 90% in minutes. Bioinspired designs mimicking biological swarm behavior offer reusable, eco-friendly alternatives to conventional remediation strategies.
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