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Exploring Nanoplastics Bioaccumulation in Freshwater Organisms: A Study Using Gold-Doped Polymeric Nanoparticles
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Researchers developed gold-doped polymer nanoparticles as traceable stand-ins for nanoplastics to study how these tiny particles accumulate in freshwater organisms including algae, zooplankton, and mussels. The approach enables more precise measurement of nanoplastic uptake across the food chain, helping scientists better understand the real-world bioaccumulation risks of plastic pollution in freshwater ecosystems.
The evaluation of nanoplastics bioaccumulation in living organisms is still considered an emerging challenge, especially as global plastic production continues to grow, posing a significant threat to humans, animals, and the environment. The goal of this work is to advance the development of standardized methods for reliable biomonitoring in the future. It is crucial to employ sensitive techniques that can detect and measure nanoplastics effectively, while ensuring minimal impact on the environment. To understand nanoplastics retention by freshwater organisms, phyto- and zooplankton, and mussels were exposed to gold-doped polymeric nanoparticles synthesized in our laboratory. The results demonstrated that measuring gold content using inductively coupled plasma mass spectrometry (ICP-MS), along with confirmation of its presence through electron microscopy in selected exposed samples provides insight into the accumulation and release of nanoplastics by organisms playing a relevant ecological role at the early levels of aquatic food webs.
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Core–Shell Au@Nanoplastics as a Quantitative Tracer to Investigate the Bioaccumulation of Nanoplastics in Freshwater Ecosystems
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Researchers developed a novel gold-core/polystyrene-shell nanoparticle tracer that mimics nanoplastic behavior in freshwater but can be detected and quantified far more precisely using the gold core's chemical signature. Using this tracer in artificial freshwater mesocosms, they tracked how nanoplastics distribute across water, sediment, and organisms — providing a powerful new tool to study nanoplastic fate and bioaccumulation.
Distribution, bioaccumulation, and trophic transfer of palladium-doped nanoplastics in a constructed freshwater ecosystem
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Researchers used palladium-doped nanoplastics as tracers in a constructed freshwater ecosystem to quantitatively track distribution, bioaccumulation, and trophic transfer, finding that nanoplastics move through multiple trophic levels and accumulate in organisms.
Gold-labelled nanoplastics models: Synthesis, detection, and quantification by SP-ICP-MS in Daphnia magna
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Scientists have developed a clever new tool to track tiny plastic particles (nanoplastics) inside living organisms by attaching a microscopic gold marker to them, making even trace amounts detectable and measurable. Using this method on water fleas, they showed the tiny creatures absorbed more plastic the more they were exposed to, confirming these particles build up in the body over time. While this study was done in a small aquatic organism rather than humans, it's an important step toward better understanding how nanoplastics—found throughout our environment and food—accumulate in living things, which is crucial groundwork for future research into their health effects on people.
Infiltration of freshwater food chain by nanoplastics: An examination of trophic transfer and biological impact
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Researchers used fluorescent nanoplastics to track how these particles move through a freshwater food chain from algae to water fleas. They found that nanoplastics accumulated more in water fleas through the food chain than through direct water exposure, with positively charged particles infiltrating more readily. The study suggests that foodborne nanoplastic exposure may be a more significant pathway for contamination in aquatic ecosystems than waterborne exposure alone.
Tracking nanoplastics in freshwater microcosms and their impacts to aquatic organisms
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Researchers tracked palladium-doped polystyrene nanoplastics in freshwater microcosms and found they caused toxic effects on cyanobacteria, green algae, and crustaceans at varying concentrations, with particle aggregation and surface interactions driving organism-specific impacts.
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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.