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Nanoparticle in Removal of Microplastics
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Scientists found that tiny particles made of nickel can soak up microplastics from water, removing up to 83% of them in lab tests. This matters because microplastics are showing up in our drinking water, food, and even our bodies, and this cheap, eco-friendly method could one day help water treatment plants filter them out before they reach our taps. That said, this is early-stage lab research, so more testing is needed before it becomes a real-world solution.
This research examines the potential of nickel nanoparticles (Ni NPs) as promising adsorbents for removing microplastics from water. Ni NPs were prepared using chemical reduction and then characterized using SEM, XRD, UV-vis, FTIR and magnetometry. The maximum removal efficiency of the microplastic was accomplished in 90 min and a pH of 5 (83% removal efficiency). The adsorption of microplastic by Ni NPs followed the Langmuir and Freundlich isotherms. The Ni NPs were cost effective and environmentally benign when compared to many other nanosized materials. The results demonstrate that Ni NPs are potentially useful for advanced water treatment systems that remove microplastic pollutants.
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Researchers reviewed the distribution of microplastics across environmental compartments and assessed sustainable removal techniques including filtration, bioremediation, and advanced oxidation processes. Because microplastics persist ubiquitously in air, water, soil, and food, no single removal method is sufficient — this review frames the scale of the challenge and the need for integrated, multi-stage mitigation strategies.
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"This chapter reviewed physical, chemical, and biological remediation techniques for removing and degrading microplastics—including coagulation, membrane filtration, adsorption, and biodegradation—comparing their efficiencies and limitations across different environmental matrices. Advancing cost-effective removal technologies is essential for protecting drinking water supplies and reducing the microplastic burden that reaches human consumers through contaminated water and food."
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Physical, chemical, and biological methods each offer distinct tradeoffs for removing microplastics from water resources, with no single approach achieving complete removal across all particle sizes and polymer types. Advancing these treatment technologies is essential to protecting drinking water supplies and reducing the biological uptake of microplastics in humans and wildlife.
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Researchers reviewed magnetic nanoparticle (MNP) strategies for removing microplastics from water, evaluating approaches including magnetic biochar, carbon nanotubes, and ferrofluid-based systems, and found that while MNPs show strong remediation potential, their environmental toxicity, lifecycle impacts, and effects on human health require careful assessment before large-scale deployment.
Nanorobotics: A Futuristic Approach to Microplastic Removal
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Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.