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Microplastics as an Emerging Vector of Cr(Vi) in Water: Correlation of Aging Properties and Adsorption Behavior
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Aging amplifies synergistic adsorption and reduction of Cr(VI) by polyamide microplastics
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UV and chemical aging of polyamide microplastics increased their oxygen-containing functional groups and significantly enhanced their capacity to both adsorb and chemically reduce toxic hexavalent chromium to the less harmful Cr(III) form in water. This shows that weathered microplastics in natural environments are more effective heavy metal scavengers than pristine particles, altering the fate and bioavailability of toxic metals in aquatic systems.
Microplastics as an emerging vector of Cr(VI) in water: Correlation of aging properties and adsorption behavior
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Researchers studied the correlation between aging properties and adsorption of hexavalent chromium Cr(VI) onto polyethylene microplastics under accelerated UV aging conditions, finding that aging-induced changes in surface chemistry increased the adsorption capacity. Aged microplastics may act as more effective vectors for toxic heavy metals in aquatic environments.
Contaminant Release from Aged Microplastic
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Aged microplastics release a range of adsorbed contaminants, including heavy metals and persistent organic pollutants, as they weather and degrade in the environment. This contaminant release mechanism makes aged microplastics particularly hazardous vectors for chemical exposure in both wildlife and humans.
Contaminant Release from Aged Microplastic
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Aged microplastics in the environment accumulate and release contaminants through sorption and desorption processes, acting as both reservoirs and delayed-release vectors for pollutants. As plastics weather over time, their increasing surface area and altered chemistry enhance contaminant uptake and release, meaning older environmental microplastics pose escalating toxicological risks to wildlife and humans.
Plastic Pollution Amplified: Adsorption of Contaminants onto Microplastic Surfaces
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This review examined how microplastics act as vectors for co-pollutants — including heavy metals, persistent organic pollutants, and pharmaceuticals — adsorbing these substances onto their surfaces and potentially delivering concentrated doses to organisms that ingest them. The "Trojan horse" effect of microplastics as contaminant carriers significantly amplifies their toxicological risk beyond the particles themselves, with direct implications for human health via contaminated seafood and drinking water.
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