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Chemical and biological cargo on microplastics: current evidence for the Trojan-horse pathway to human exposure
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This review pulls together current research showing that microplastics aren't just harmless debris—as they break down in the environment, they become sticky magnets that pick up toxic chemicals (like "forever chemicals" and heavy metals) and harmful bacteria, including antibiotic-resistant germs, then carry this dangerous cargo into our bodies like a Trojan horse. Scientists have already found microplastics in human blood, lungs, and even the placenta, and lab studies suggest this contaminant hitchhiking may increase cell damage and inflammation, though more research is needed to fully understand the health risks. The takeaway: reduc
Microplastics (MPs) are increasingly recognised not as inert litter, but as chemically and biologically active interfaces that interact dynamically with environmental contaminants and microbial communities. Environmental weathering processes, including photochemical oxidation and mechanical abrasion, increase MP surface roughness and oxygen-containing functional groups by 2-10-fold, enhancing sorption capacity and eco-corona formation. These eco-coronas, composed of natural organic matter, biomolecules, and extracellular polymers, alter MP physicochemical properties and promote microbial colonisation. The resulting "plastisphere" facilitates microbial succession and antibiotic resistance gene (ARG) enrichment by 10-100-fold relative to surrounding environments through enhanced horizontal gene transfer. MPs also act as vectors for co-contaminants through the "Trojan-horse" effect, accumulating PFAS, PAHs, and heavy metals and amplifying oxidative stress and genotoxicity. Key findings indicate that: (1) weathered MPs exhibit enhanced contaminant adsorption and transport potential; (2) eco-corona formation governs pollutant binding and microbial attachment; (3) nanoplastics (<100 nm) show increased cellular uptake and bioavailability; (4) co-exposure to MPs and contaminants increases reactive oxygen species generation by 30-300% in biological models; and (5) MPs have been detected in human tissues, including lungs (∼7.1 μg g), blood (∼77% detection frequency), placenta (up to 790 μg g), and feces (10-20 particles g). Despite rapid advances, methodological and regulatory gaps continue to limit accurate risk assessment. Collectively, these findings establish MPs as dynamic ecological interfaces requiring integrated mitigation and regulatory strategies.
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Microplastics as carriers of environmental contaminants: Implications for human exposure, toxicokinetics, and health risk.
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Tiny plastic particles found in our air, water, and food aren't just a problem on their own, this review pulls together existing research showing they can act like sponges, soaking up toxic chemicals like heavy metals, industrial pollutants, and even medications, then potentially carrying them into our bodies. Scientists have already found microplastics in human tissue, and this combination of plastic plus hitchhiking chemicals may pose greater health risks than either would alone, though more research is needed to fully understand the danger.
Microplastics as carriers of toxic pollutants: Source, transport, and toxicological effects
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This review summarizes how microplastics absorb and carry toxic pollutants like persistent organic pollutants, heavy metals, and antibiotics through the environment, concentrating these harmful chemicals as they move through ecosystems. When organisms ingest these contaminated particles, the pollutants can build up in the food chain and eventually reach humans, making microplastics not just a physical hazard but also a chemical delivery system.
A comprehensive review on microplastics as vectors of chemical and biological pollutants
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Tiny plastic bits (microplastics) found in water, soil, and food don't just pollute on their own—this review of existing research shows they can act like sponges, soaking up harmful chemicals and germs and carrying them into animals and ecosystems. Studies suggest plastics loaded with these pollutants can be more toxic than the pollutants alone, raising concerns about how much of this contaminated plastic might build up in the food chain—and potentially in us. More real-world research is needed to fully understand the risk, but this is a good reason to keep reducing plastic exposure where you can.
A comprehensive review on microplastics as vectors of chemical and biological pollutants
AI summary Read the abstract
Microplastics don't just pollute on their own—this review of existing research shows they can act like tiny sponges, soaking up harmful chemicals and germs from the environment and carrying them into animals and ecosystems (and potentially our food supply). Studies suggest pollutants that hitch a ride on microplastics may be even more toxic and prone to building up in living things than pollutants floating freely, though real-world conditions like biofilm growth make this tricky to predict. The takeaway: we need more research on microplastics in realistic settings to understand the true health risks and create better policies to limit exposure.
Transport of micro- and nanoplastics in the environment: Trojan-Horse effect for organic contaminants
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This review examines how micro- and nanoplastics act as carriers for organic contaminants in the environment, a phenomenon known as the Trojan-Horse effect. Researchers found that these tiny plastic particles can adsorb both their own chemical additives and external pollutants, transporting them across ecosystems through water, air, and soil. The study suggests that the ability of microplastics to concentrate and deliver harmful chemicals to organisms may amplify their environmental and health impacts beyond the effects of the plastic particles alone.
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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.