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Microplastics (MPs), plastic debris smaller than 5 mm, indirectly harm the environment. They are traditionally collected and removed from water by filtering through meshes, which is inefficient. Researchers have now developed a high-enrichment microfluidic device that utilizes acoustic focusing to collect and remove 10–200 ?m MPs from wastewater without recirculation. Its collection rates and enrichment ratios ranged approximately from 70–90% and 50–100, respectively on test samples.