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61,005 resultsShowing papers similar to Microplastic-mediated transport of PCBs? A depuration study with Daphnia magna
ClearMicroplastic-mediated transport of PCBs? A depuration study with Daphnia magna
Researchers tested whether microplastics could help remove PCBs from the water flea Daphnia magna, finding that only one PCB congener was cleared more efficiently with microplastic exposure while most others were unaffected. The study suggests microplastics have limited value as a depuration tool for PCB-contaminated zooplankton under environmentally relevant conditions.
The effect of microplastics on the depuration of hydrophobic organic contaminants in Daphnia magna: A quantitative model analysis
Researchers developed a biodynamic model to predict how microplastic ingestion affects the elimination of hydrophobic organic contaminants in water fleas (Daphnia magna), finding that microplastics actually promote the depuration of PCBs by creating a fugacity gradient — contributing 29–41% of total contaminant elimination, with smaller particles having a stronger effect.
Accumulation, depuration, and potential effects of environmentally representative microplastics towards Daphnia magna
Researchers created environmentally realistic microplastics by grinding common consumer products and tested their effects on Daphnia magna, a small freshwater organism widely used in toxicity studies. The organisms accumulated the microplastics and showed some ability to clear them over time, but the realistic microplastics caused different effects than the pristine laboratory plastics typically used in research. This suggests that many existing studies may underestimate the true environmental risk of microplastics.
Microplastic Particles’ Effects on Aquatic Organisms and Their Role as Transporters of Organic Pollutants
Researchers tested the effects of polyethylene microplastics, both pure and contaminated with pesticides and hydrocarbons, on water fleas and ostracods. While pure microplastics alone did not cause significant harm, particles loaded with pollutants like chlorpyrifos and phenanthrene reduced reproduction and survival over longer exposure periods. The study provides evidence that microplastics primarily pose risks to aquatic organisms by acting as carriers of more toxic chemical pollutants.
Transport of persistent organic pollutants: Another effect of microplastic pollution?
This review examines how microplastics act as vectors for persistent organic pollutants (POPs) in aquatic environments, covering the physical and chemical factors governing pollutant adsorption and desorption. The authors discuss how interactions between microplastics and POPs vary with polymer type, particle properties, and environmental conditions, and when these interactions may result in toxic effects on aquatic organisms.
Plastic as a Carrier of POPs to Aquatic Organisms: A Model Analysis
Researchers developed a model to evaluate whether microplastic acts as a meaningful carrier of persistent organic pollutants to aquatic organisms. The analysis suggests that in both laboratory and open marine systems, microplastic ingestion is more likely to slightly decrease bioaccumulation of pollutants rather than increase it, and the differences are too small to be relevant for risk assessment.
Assessment of intake and effect of microplastics and its combination with metals in experimental (Daphnia magna) and environmental conditions (freshwater fish)
Researchers assessed the intake and effects of microplastics and their combination with metals using Daphnia magna as an experimental model and freshwater fish under environmental conditions, investigating how microplastics adsorb and transport harmful metals in freshwater systems.
Tissue translocation, multigenerational and population effects of microplastics in Daphnia magna
This study examined how microplastics are taken up by the water flea Daphnia magna and whether exposure causes multigenerational effects, finding that microplastics can accumulate in body tissues and pass to offspring. The results suggest microplastic pollution poses risks not just to exposed individuals but can affect population health across generations.
Effects of microplastics on key reproductive and biochemical endpoints of the freshwater microcrustacean Daphnia magna
Researchers studied how microplastics affect reproduction and biochemistry in the freshwater water flea Daphnia magna, a widely used indicator species. They found that microplastic exposure led to changes in reproductive output and altered key biochemical markers in these small crustaceans. The study suggests that even tiny plastic particles can disrupt important biological functions in freshwater organisms that form the base of aquatic food webs.
Quantifying nanoplastic-bound chemicals accumulated in Daphnia magna with a passive dosing method
A passive dosing method was used to measure how chemicals accumulate in Daphnia water fleas when nanoplastics are present, helping separate direct particle effects from chemical effects. Understanding which pathway causes more harm is essential for accurately assessing nanoplastic risk.
Ingestion of micro- and nanoplastics in Daphnia magna – Quantification of body burdens and assessment of feeding rates and reproduction
Researchers used a quantitative approach to measure how the water flea Daphnia magna ingests and excretes micro- and nanoplastic particles of different sizes. They found that larger 2-micrometer particles were ingested in greater mass than 100-nanometer particles, and that complete excretion did not occur within 24 hours. Chronic exposure reduced feeding rates and reproduction, suggesting that ongoing microplastic exposure could have meaningful ecological consequences for these important freshwater organisms.
Metal sorption onto nanoscale plastic debris and trojan horse effects in Daphnia magna: Role of dissolved organic matter
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.
Size-dependent vector effects of microplastics on bioaccumulation of hydrophobic organic contaminants in earthworm: A dual-dosing study
Researchers developed a dual-dosing method to directly measure how microplastics act as carriers for hydrophobic organic contaminants in earthworms. The study found that smaller microplastic particles had greater vector effects, increasing bioaccumulation of pollutants, and that dermal uptake played a significant role in contaminant transfer from microplastics to organisms.
Toxic effects of fluoxetine-loaded onto virgin or aged polypropylene, polyamide and polyvinyl chloride microparticles on Daphnia magna
Researchers tested whether microplastics loaded with the antidepressant fluoxetine could transfer the drug into the food chain using water fleas as a model organism. They found that all types of microplastics carrying fluoxetine were toxic to the water fleas, with virgin plastics causing more harm than weathered ones. The study provides evidence that microplastics can act as carriers for pharmaceutical pollutants in aquatic environments, delivering harmful chemicals to organisms that ingest them.
Do microplastics mediate the effects of chemicals on aquatic organisms?
This review examined whether microplastics act as vectors for chemical contaminants in aquatic organisms, finding that while chemicals can sorb to microplastics, the evidence for microplastics significantly enhancing chemical toxicity in natural settings remains limited.
Co-occurrence of microplastics and organic/inorganic contaminants in organisms living in aquatic ecosystems: A review
This review examines studies that measured both microplastics and chemical pollutants (organic and inorganic) in aquatic organisms at the same time. A positive correlation was found between microplastic levels and certain pollutants in organisms, suggesting microplastics may help transport contaminants into living things. The findings raise concerns that seafood contaminated with microplastics could also carry higher levels of toxic chemicals into the human diet.
Understanding the biological impact of organic pollutants absorbed by nanoplastics
Researchers assessed the toxicity of diphenylamine (DPA) incorporated into PMMA nanoparticles using barnacle larvae as a model organism, investigating how nanoplastics act as carrier vectors that increase the bioavailability of persistent organic pollutants and enhance biological impacts beyond those of either contaminant alone.
Rethinking the relevance of microplastics as vector for anthropogenic contaminants: Adsorption of toxicants to microplastics during exposure in a highly polluted stream - Analytical quantification and assessment of toxic effects in zebrafish (Danio rerio)
Researchers exposed microplastics in a highly polluted stream to assess their role as contaminant vectors, then tested effects on zebrafish, finding that naturally contaminated microplastics had limited additional toxicity compared to the polluted water itself.
Microplastics as a vehicle of exposure to chemical contamination in freshwater systems: Current research status and way forward
This review assessed the current state of research on microplastics as vectors for chemical contaminants in freshwater systems, evaluating evidence for and against the vector hypothesis and identifying the most important knowledge gaps, including the need for studies at environmentally realistic concentrations.
Consumption and Impacts of Water-Borne Polypropylene Microplastics on Daphnia Similis
This study exposed water fleas (Daphnia similis) to polypropylene microplastics and found that the particles accumulated in their digestive tracts and disrupted biochemical processes. Polypropylene is one of the most common plastics in consumer packaging, making it a major contributor to microplastic pollution in aquatic environments. Daphnia are a key link in aquatic food chains, so their disruption could affect fish and other wildlife that consume them.
Adsorption and Desorption Behaviour of Polychlorinated Biphenyls onto Microplastics’ Surfaces in Water/Sediment Systems
Researchers evaluated the adsorption and desorption behavior of polychlorinated biphenyls (PCBs) onto polystyrene, polyethylene, and polyethylene terephthalate microplastics of varying sizes in marine water/sediment systems. Results showed that polymer type and particle size influenced PCB binding capacity, with microplastics acting as potential vectors for transferring persistent organic pollutants to marine biota through the food chain.
Influence of microplastics on the bioconcentration of organic contaminants in fish: Is the “Trojan horse” effect a matter of concern?
Researchers tested whether microplastic ingestion increases the bioconcentration of hydrophobic organic chemicals in zebrafish, examining the so-called 'Trojan horse' effect. They found that exposure to contaminated polyethylene microplastics did not significantly increase chemical accumulation in fish compared to waterborne exposure alone. The study suggests that for these chemicals, direct water exposure remains the dominant uptake pathway, and the microplastic carrier effect may be less concerning than previously thought.
Microplastics as a Vector for Exposure to Hydrophobic Organic Chemicals in Fish: A Comparison of Two Polymers and Silica Particles Spiked With Three Model Compounds
Three-spined sticklebacks fed microplastic-contaminated diets showed measurable transfer of hydrophobic chemicals (including an estrogen mimic, a pesticide, and a PAH) from the plastics into fish tissues, though transfer rates were low. The study confirms that ingested microplastics can act as vectors for chemical contaminants in fish, even if the overall exposure remains modest.
Size-dependent vector effect of microplastics on the bioaccumulation of polychlorinated biphenyls in tilapia: A tissue-specific study
Researchers examined how different sizes of polystyrene microplastics affect the accumulation of polychlorinated biphenyls (PCBs) in tilapia tissues. The study found that microplastic size plays a significant role in contaminant bioaccumulation, with smaller particles leading to different tissue-specific uptake patterns, suggesting that microplastics can act as vectors for transporting harmful organic pollutants into aquatic organisms.