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Polystyrene microplastics alter the accumulation and elimination dynamics of silver nanoparticles in Daphnia magna
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Scientists found that tiny plastic particles (microplastics) can change how silver nanoparticles, used in things like antibacterial coatings and water filters, build up in small aquatic organisms like water fleas. The plastics caused these creatures to absorb more silver from their water and hold onto it longer, meaning pollutants that seem harmless on their own might interact and become more concerning when combined in the environment. While this study was done in water fleas rather than humans, it's a reminder that plastic pollution could be affecting how other chemicals move through ecosystems, and potentially up the food chain.
Environmental context Microplastics are widespread aquatic contaminants that can alter the environmental behavior of co-occurring pollutants. This study shows that polystyrene microplastics substantially modify silver nanoparticle bioaccumulation in Daphnia magna, increasing waterborne uptake, accelerating elimination and ultimately elevating predicted steady-state silver burdens. These findings can improve understanding of microplastic–nanoparticle interactions and can support future assessments of contaminant fate and ecological risk in aquatic systems.
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Metal sorption onto nanoscale plastic debris and trojan horse effects in Daphnia magna: Role of dissolved organic matter
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Researchers tested whether nanoscale plastic particles act as a "Trojan horse" by carrying toxic silver ions into water fleas (Daphnia magna), finding that the plastic-silver combination was indeed toxic even when neither substance alone caused harm — but dissolved organic matter (naturally present in rivers and lakes) largely blocked this effect. This suggests the Trojan horse risk from nanoplastics may be lower in natural freshwater environments than lab conditions imply.
Data acquired in laboratory experiments conducted to characterize Ag bioaccumulation kinetics in Daphnia magna after exposures to polystyrene microplastics and Ag nanoparticles
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Researchers assessed how the presence of polystyrene microplastics affects the bioaccumulation of silver nanoparticles in the filter-feeding zooplankton Daphnia magna. The study provides laboratory data on silver uptake kinetics at environmentally relevant concentrations, contributing to understanding how microplastics may interact with other contaminants to alter their biological availability to aquatic organisms.
Polystyrene microplastics facilitate the biotoxicity and biomagnification of ZnO nanoparticles in the food chain from algae to daphnia
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Researchers found that polystyrene microplastics enhanced the toxicity and biological accumulation of zinc oxide nanoparticles in an aquatic food chain from algae to water fleas. When both pollutants were present together, water fleas showed increased oxidative stress, higher heart rates, and greater zinc accumulation compared to exposure to either pollutant alone. The study demonstrates that microplastics can amplify the harmful effects of other nanoparticle contaminants as they move through the food chain.
Effects of nanoplastics and microplastics on toxicity, bioaccumulation, and environmental fate of phenanthrene in fresh water
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Researchers studied how nanoplastics and microplastics interact with the toxic pollutant phenanthrene in freshwater, using tiny water fleas as test organisms. They found that nanoplastics increased the toxicity and bioaccumulation of phenanthrene, while larger microplastics actually reduced its harmful effects. The study suggests that the size of plastic particles plays a critical role in determining whether they make co-occurring pollutants more or less dangerous to aquatic life.
Polystyrene nanoplastics mediated the toxicity of silver nanoparticles in zebrafish embryos
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Researchers studied how polystyrene nanoplastics interact with silver nanoparticles and affect zebrafish embryo development. They found that nanoplastics can act as carriers for silver nanoparticles in water, and the combination altered patterns of oxidative stress, immune response, and metabolic function compared to either pollutant alone. The study highlights how nanoplastics may change the way other environmental contaminants affect aquatic organisms.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.