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Green and efficient removal of microplastics from water by ultrasound
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Tiny plastic bits (microplastics) are turning up in our water supplies, and scientists are testing ways to filter them out before they reach our taps. This review looks at one promising method, using ultra-fine bubbles that stick to plastic particles and float them to the surface for removal, which has removed 75 to 95% of microplastics in lab studies. While the technology shows real promise as an affordable, scalable way to clean water, researchers note it still needs refinement before widespread use, especially for smaller or aged plastic particles that behave less predictably.
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Wastewater treatment plants act as both a sink and a source for microplastics, capturing large fractions but still releasing significant quantities into receiving water bodies and concentrating particles in sewage sludge spread on agricultural land. Improving removal technologies at treatment plants is one of the most impactful intervention points for reducing microplastic flux into downstream environments.
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