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Interaction of freshwater microplastics with biota and heavy metals: a review
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Researchers reviewed how microplastics in freshwater act as sponges for heavy metals like lead and mercury, binding these toxic substances to their surfaces and potentially delivering a double dose of harm to aquatic life and the humans who depend on freshwater sources for drinking and food.
The worldwide contamination of waters by microplastics is an emerging health and environmental issue. Despite being relatively inert, microplastics may adsorb and carry other aquatic pollutants such as heavy metals. Adsorption of heavy metals onto microplastics is a spontaneous process controlled by the microplastic surface. Marine microplastics have been well discussed, yet there are actually a few reviews on microplastics in freshwater. Here, we review microplastic contamination in freshwater systems with focus on adsorption of heavy metals. We present microplastic abundance, distribution, impact of microplastic size, affinity for heavy metals and combined toxic effects of the co-occurrence of microplastic and heavy metals. Remarkably, the concentration of metals on polystyrene and polyvinyl chloride was 800 times higher than in the surrounding environment. Combined toxic effects include endocrine disrupting and reduced predatory behavior of aquatic carnivores.
More Papers Like This
Interactions Between Microplastic and Heavy Metals in the Aquatic Environment: Implications for Toxicity and Mitigation Strategies
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This review examined how microplastics interact with heavy metals in aquatic environments, showing that temperature, pH, salinity, polymer type, and particle size modulate adsorption, desorption, and combined toxicity, with MPs acting as mobile heavy metal carriers throughout aquatic food webs. Understanding the synergistic toxicity of MPs and heavy metals is essential because their combined effects on aquatic organisms—and on humans consuming contaminated seafood—likely exceed the hazard of either pollutant alone.
Distribution and Impact of Microplastics in the Aquatic Systems: A Review of Ecotoxicological Effects on Biota
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Researchers reviewed how microplastics are distributed across marine, freshwater, and terrestrial environments and the toxic effects they have on a wide range of organisms. Fish, invertebrates, and other animals that ingest microplastics experience physical harm, chemical toxicity, and reproductive disruption — effects that may ultimately reach humans through the food chain.
Environmental perspectives of microplastic pollution in the aquatic environment: a review
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Researchers reviewed how microplastics spread through freshwater and marine environments worldwide, finding they accumulate in sediments, absorb toxic chemicals, and create surfaces where antibiotic-resistant and potentially pathogenic bacteria can thrive. This pollution threat reaches even Antarctica and the deep sea, posing risks throughout aquatic food webs.
Microplastic Toxicity in Aquatic Organisms and Aquatic Ecosystems: a Review
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Researchers reviewed how microplastics move through aquatic food webs, finding evidence that these particles accumulate across trophic levels, but noted that most toxicity studies are conducted in labs rather than real ecosystems, leaving major gaps in understanding the true ecological and human health risks.
Ecotoxicological Consequences of Microplastics in Aquatic Life
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Researchers reviewed how microplastics — tiny plastic particles under 5mm — harm aquatic ecosystems, documenting that fish, invertebrates, and other marine life can ingest them, leading to physical damage, toxic chemical exposure, and disruptions to feeding and reproduction.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.