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Enhanced Adsorption Performance of Tetracycline on Microplastics after Anaerobically Microbial-Mediated Aging Process
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Enhanced adsorption of tetracycline on polypropylene and polyethylene microplastics after anaerobically microbial-mediated aging process
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Researchers found that anaerobic microbial aging of polypropylene and polyethylene microplastics altered their surface structure and crystallinity, significantly enhancing their ability to adsorb the antibiotic tetracycline compared to unaged particles.
Adsorption of Tylosin and Tetracycline onto Microplastics: Behavior and Effects of Adsorbents and Salinity
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Batch adsorption experiments showed that polyethylene, polystyrene, and PVC microplastics can adsorb the antibiotics tylosin and tetracycline, with PVC showing the highest adsorption capacity and salinity enhancing tylosin uptake through a salting-out effect. This confirms that environmental microplastics act as mobile carriers for antibiotic pollutants, potentially spreading antimicrobial resistance to new ecosystems and amplifying the health risks of plastic pollution.
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Scientists found that when microplastics (both regular plastic and "eco-friendly" biodegradable plastic) get weathered by sunlight and cleaning chemicals used in wastewater treatment, their surfaces become rougher and chemically altered, making them up to 4 times better at soaking up azithromycin, a common antibiotic that surged in use during COVID-19. This matters because these antibiotic-loaded microplastics could act as carriers, potentially transporting drugs through water systems and the environment in ways that aren't fully understood yet, including possibly contributing to antibiotic resistance or human exposure down the line.
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