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Modified hydrogel for high efficiency SERS detection and adsorption removal of microplastics
AI summary
Researchers developed a modified hydrogel material capable of both detecting and capturing microplastics using surface-enhanced Raman spectroscopy (SERS). The hydrogel's porous structure allows it to adsorb microplastic particles from water while SERS provides sensitive, rapid identification of plastic types. This dual-function approach offers a promising tool for environmental monitoring and microplastic removal from water systems.
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Researchers developed a copper-doped polydopamine-functionalized magnetic silica adsorbent that captures nano- and microplastics within 3 minutes, and using its laccase-like catalytic activity combined with machine learning analysis, enables rapid on-site detection of diverse plastic particle types even at nanoscale concentrations in real water sources.
Microplastic pollutant detection by Surface Enhanced Raman Spectroscopy (SERS): a mini-review
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This mini-review surveys surface-enhanced Raman spectroscopy (SERS) substrates and label-free detection strategies for identifying microplastics in water, covering metal nanoparticle suspensions, immobilized substrates, and nanofabricated platforms. SERS offers a highly sensitive analytical tool for detecting and characterizing microplastic pollutants at trace concentrations in complex aquatic environments.
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This review evaluates emerging bionanomaterials — including layered double hydroxides, magnetic nano-Fe3O4, carbon-based adsorbents, and electrospun nanofiber membranes — as green remediation tools for removing micro- and nanoplastics from water, with some achieving up to 90% removal efficiency. Developing effective, scalable, and environmentally benign removal technologies is urgent given that conventional water treatment plants are poorly equipped to intercept the smallest plastic particles that pose the greatest risk to human health.
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Researchers reviewed how microplastics act as sponges for environmental pollutants like pesticides, heavy metals, and pharmaceuticals, absorbing and concentrating these chemicals in ways that can amplify their toxicity when ingested by marine animals — and potentially by humans.
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