Unravelling the complex adsorption behavior of extracellular polymeric substances onto pristine and UV-aged microplastics using two-dimensional correlation spectroscopy

Desorption of Hydrophobic Organic Chemicals from Fragment-Type Microplastics

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Hydrophobic organic chemicals (HOCs) including persistent pollutants desorb from irregularly shaped polyethylene and polypropylene microplastic fragments in seawater at rates predictable from simple geometric approximations of particle size. This matters because microplastics act as mobile carriers of toxic chemicals, and understanding desorption kinetics helps assess how much contamination is released into marine food webs.

Insights into the Properties and Adsorption–desorption Behaviors of Aged Microplastics with Different Colors

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Researchers aged black tire wear particles and white polyethylene microplastics under UV light in the presence and absence of algal organic matter, finding that aging increased their adsorption capacity for the antibiotic tetracycline hydrochloride, with the degree of aging and adsorption behavior differing by particle color and composition. This reveals that weathered microplastics in real aquatic environments act as amplified vectors for antibiotic transport, posing compounded risks to aquatic ecosystems and potentially human health through contaminated water sources.

Factors Affecting the Sorption of Pollutants by Microplastics: Mechanisms and Environmental Implications

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Researchers reviewed the physicochemical factors — including particle size, surface area, weathering state, and polymer type — that govern how microplastics sorb environmental pollutants, and examined the ecological implications of this vector effect for contaminant transport and bioavailability.

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.

Combined abiotic and biotic weathering of microplastic particles: Alterations of their physicochemical properties and interactions with cells