Papers

Twenty years of microplastic pollution research—what have we learned?

This review looks back at 20 years of microplastic research and finds that these tiny plastic particles are now found everywhere, from our oceans to our food and even inside human bodies. Contamination could double by 2040, and there is growing evidence of harm to both ecosystems and human health. The authors stress that clear solutions are urgently needed to reduce risks.

A systematic review of biomonitoring microplastics in environmental matrices: Emphasis on airborne particles, dry deposits, and comparative analysis with traditional methods

This systematic review examines methods for monitoring microplastics in the air, including airborne particles and deposits. Researchers have found microplastics everywhere from city streets to clouds, underscoring the extent of airborne plastic pollution that people breathe in every day.

Microplastics in urine, sputum and lung lavage fluid from patients with respiratory illnesses

Researchers analyzed urine, sputum (mucus from coughing), and lung fluid from 30 patients with respiratory conditions in Iran and found microplastics in all three types of samples. Sputum contained the most particles (358 total), dominated by polyurethane fibers, while urine had the fewest (9 particles). The different types and sizes of plastics found in each fluid suggest the body sorts and distributes inhaled and ingested microplastics through different pathways.

Microplastics and nanoplastics in tea: Sources, characteristics and potential impacts

This review looks at how microplastics and nanoplastics end up in tea, with plastic teabags being the biggest culprit, releasing over a billion tiny particles per bag when steeped in hot water. Even biodegradable and composite tea bags release significant amounts of plastic particles, raising health concerns given that tea is one of the most widely consumed beverages in the world.

Deep dive into the chronic toxicity of tyre particle mixtures and their leachates

Researchers tested the toxicity of tire tread microparticles — shed from vehicle tires at roughly 1.4 kg per car per year — on water fleas (Daphnia magna) over 21 days and found the particles were nearly 10 times more toxic than chemical leachates from the same tires alone. Chemical analysis identified zinc, titanium, and 54 organic compounds shared across five major tire brands, with many classified as very toxic to aquatic life.

Stakeholder alliances are essential to reduce the scourge of plastic pollution

This commentary argues that reducing plastic pollution requires much better cooperation between scientists, industry, the public, and policymakers. Progress has been painfully slow, and damage to the environment and human health continues to grow. The authors call for these four groups to find new ways to work together to address the plastic crisis more effectively.

International consensus guidelines for the definition, detection, and interpretation of autophagy-dependent ferroptosis

This scientific review provides guidelines for understanding a specific type of cell death called autophagy-dependent ferroptosis, where cells essentially digest their own protective components and then die from iron-driven damage. While not directly about microplastics, this process is relevant because microplastics and nanoplastics have been shown to trigger oxidative stress and iron-related cell damage in tissues. Understanding these cell death pathways helps researchers assess how plastic particle exposure could harm organs like the liver, brain, and lungs.

Ecotoxicological impacts of landfill sites: Towards risk assessment, mitigation policies and the role of artificial intelligence

This review examines the health and environmental risks posed by landfill sites, which act as reservoirs for both legacy and emerging pollutants including microplastics. Unregulated waste disposal and leachate contamination are linked to diseases in nearby communities, and laboratory studies show toxic effects on organisms from bacteria to birds. The authors recommend improving landfill design, leachate treatment, and exploring artificial intelligence to better predict and manage these pollution risks.

Controlled Release of Radioactive Water from the Fukushima Daiichi Nuclear Power Plant: Should We Be Concerned?

This paper discusses the controlled release of radioactive water from the Fukushima nuclear disaster site into the ocean, raising concerns about seafood safety and long-term environmental health effects. While focused on radioactive contamination rather than microplastics, the study is relevant because it highlights how ocean pollutants can accumulate in marine life and move up the food chain to humans. Both radioactive materials and microplastics share this pathway of exposure through seafood consumption.

Ingested Microscopic Plastic Translocates to the Circulatory System of the Mussel, <i>Mytilus edulis</i> (L.)

Researchers discovered that microplastic particles ingested by mussels can move from the gut into the circulatory system within three days and persist in the body for over 48 days. Smaller particles accumulated more readily than larger ones, suggesting that as plastic debris breaks down into ever-smaller fragments in the environment, the potential for it to build up inside living organisms increases.

Moving from symptom management to upstream plastics prevention: The fallacy of plastic cleanup technology

This paper argues that plastic cleanup technologies, while helpful at a local scale, cannot solve the global plastic pollution crisis and may distract from more effective solutions. The authors present evidence that reducing plastic production upstream is far more efficient and economical than trying to remove plastic from the environment after it has been released. The findings are important for human health because preventing plastic pollution at the source would reduce the microplastics that end up in food, water, and air.

Paint particles in the marine environment: An overlooked component of microplastics

Researchers highlight that paint particles, which consist of polymers combined with additives, are frequently overlooked or misclassified in studies of marine microplastic pollution. They found that paint fragments from ships, buildings, and infrastructure represent a significant but underreported source of microplastic contamination in ocean environments. The study calls for paint particles to be consistently included in marine debris monitoring to provide a more accurate picture of plastic pollution.

Microplastics and seafood: lower trophic organisms at highest risk of contamination

This systematic review summarizes existing research on microplastic contamination in commercially important seafood species. The findings show that organisms lower on the food chain, like shellfish and small fish, tend to accumulate the most microplastics. Since many people eat these organisms whole, including their digestive tracts, this represents a direct pathway for microplastics to enter the human diet.

Are We Speaking the Same Language? Recommendations for a Definition and Categorization Framework for Plastic Debris

This review examines the full lifecycle of microplastic pollution, from how plastics enter waterways to how they degrade and interact with ecosystems. Researchers found that microplastics serve as carriers for chemical pollutants and pathogens, and that their small size allows them to be ingested by a wide range of organisms across the food chain. The study emphasizes that understanding the fate and transport of microplastics is essential for developing effective pollution mitigation strategies.

Low levels of microplastics (MP) in wild mussels indicate that MP ingestion by humans is minimal compared to exposure via household fibres fallout during a meal

Researchers measured microplastic levels in wild mussels collected around the Scottish coast and found relatively low contamination compared to other studies. They then compared this to the amount of household dust fibers that settle onto a dinner plate during a typical meal and found that airborne fiber exposure during eating likely exceeds the microplastics ingested from a serving of mussels. The study suggests that for most people, indoor dust may be a more significant source of microplastic exposure than seafood consumption.

Isolation of microplastics in biota-rich seawater samples and marine organisms

Researchers developed and tested methods for extracting microplastics from seawater samples rich in biological material and from the tissues of marine organisms. They found that enzymatic digestion was the most effective and least destructive approach for isolating microplastics from biological samples, outperforming acid and alkaline treatments. The study provides improved laboratory protocols that will help scientists more accurately measure microplastic contamination in marine environments and wildlife.

Distribution and transport of microplastics in groundwater (Shiraz aquifer, southwest Iran)

Researchers investigated microplastic contamination in groundwater from an alluvial aquifer in a semi-arid region of Iran. They identified microplastics in all sampled wells, with fibers and fragments being the most common shapes and polyethylene the dominant polymer type. The study demonstrates that groundwater, an important source of drinking water, is not immune to microplastic contamination and calls for more research on transport mechanisms in subsurface environments.

The physical impacts of microplastics on marine organisms: A review

This review examined how microplastics physically affect marine invertebrates, looking at factors like particle size, density, and how different feeding styles influence which organisms are most at risk. The study highlights that microplastics can accumulate inside organisms and transfer up through the food chain, providing important guidance for future marine pollution research and management.

Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions

Researchers tested how persistent organic pollutants desorb from microplastics under conditions that simulate the digestive systems of warm-blooded marine animals versus cold-blooded fish. They found that gut surfactants and warmer body temperatures dramatically increased the release of pollutants from the plastics, with up to 30 times more chemicals released under warm-blooded conditions. The study suggests that marine mammals and seabirds may face greater chemical exposure risks from ingested microplastics than previously assumed.

Impact of polyester and cotton microfibers on growth and sublethal biomarkers in juvenile mussels

Researchers exposed juvenile mussels to polyester and cotton microfibers at realistic ocean concentrations for 94 days and found that polyester microfibers reduced mussel growth rates by up to 36%, suggesting that microplastic fiber pollution could harm marine ecosystems and threaten shellfish aquaculture.

The ecological impacts of marine debris: unraveling the demonstrated evidence from what is perceived

This systematic review critically examined the evidence for ecological damage caused by marine debris, including plastic pollution. Researchers found 366 perceived environmental threats from marine debris, and when tested, 83% of those threats were confirmed through scientific studies. This large-scale confirmation of marine debris impacts reinforces concerns about microplastics harming ocean ecosystems that humans depend on for food.

Microplastic Moves Pollutants and Additives to Worms, Reducing Functions Linked to Health and Biodiversity

Accumulation of Microplastic on Shorelines Woldwide: Sources and Sinks

Researchers found microplastic contamination on shorelines across all six continents, with higher concentrations near densely populated areas. A major source appears to be synthetic clothing fibers released during laundry, with a single garment shedding over 1,900 fibers per wash that pass through wastewater treatment and end up in the ocean.

Microplastics in the seas

This brief communication highlights growing scientific concern about microplastic contamination throughout the world's oceans. Researchers note that microplastics have been found in marine environments ranging from coastal waters to the deep sea and are being ingested by a wide variety of marine organisms. The piece underscores the need for more research into the long-term ecological consequences of this pervasive and persistent form of pollution.