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Effect of aging on the properties of microplastics and their adsorption behavior of norfloxacin
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Investigation of the Adsorption of Norfloxacin by Biodegradable and Non-biodegradable Microplastics Aged by Chemical Oxidation
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Researchers chemically aged three types of microplastics—biodegradable PLA, PET, and polypropylene—and found that aging significantly increased their capacity to adsorb norfloxacin antibiotic, with aged PLA showing the greatest enhancement due to increased surface area and roughness. These results show that environmentally weathered microplastics act as more effective vectors for antibiotic transport in water systems, potentially worsening co-contamination risks for aquatic life and human health.
Aging Characteristics and Adsorption Properties of Microplastics: Research Progress
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Tiny plastic bits (microplastics) don't just sit unchanged in the environment, sunlight, weather, and other natural forces break them down over time, and this "aging" process actually makes them better at soaking up toxic substances like heavy metals. This review pulls together existing research to show that aged microplastics may pose a bigger contamination risk than fresh ones, which matters because these particles can end up in our water, food, and eventually our bodies. Understanding how this works helps scientists better predict the real-world risks microplastics pose to human health.
The Sorption of Amoxicillin on Engineered Polyethylene Terephthalate Microplastics
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Aged PET microplastics derived from beach-collected bottles adsorbed significantly more amoxicillin antibiotic than unaged lab-produced microplastics due to increased surface area and hydrogen bonding interactions between the antibiotic and polymer ester groups. These findings confirm that weathered microplastics act as vectors for antibiotic transport in aquatic environments, potentially spreading pharmaceutical contamination far from its original source.
Adsorption behaviors and mechanisms of azithromycin on degradable and non-degradable microplastics aged with UV/sodium percarbonate
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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.
Interaction Between Polyurethane Microplastics and Ciprofloxacin: A Study on Adsorption Behaviour and Ecological Implications
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Polyurethane microplastics adsorb the antibiotic ciprofloxacin, creating combined pollutant complexes with potential ecological implications for aquatic environments. This interaction highlights how microplastics can serve as carriers for toxic co-contaminants, amplifying environmental risks beyond what either pollutant poses alone.
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