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Papers
69,080 resultsMicroplastics in the marine environment
This early review introduced and contextualized microplastics as an emerging class of marine contaminants, summarizing what was then known about their sources, distribution, and potential effects on marine organisms.
Microplastics as contaminants in the marine environment: A review
This review synthesized the state of knowledge on microplastics as marine contaminants, covering their sources, pathways, distribution, biological uptake, and potential ecological and toxicological effects.
Microplastics in the Marine Environment: A Review of the Methods Used for Identification and Quantification
This review covered the methods used to identify and characterize microplastics in marine environmental samples, evaluating the strengths and limitations of visual, spectroscopic, and chemical approaches for field and laboratory analysis.
Plastic Pollution in the World's Oceans: More than 5 Trillion Plastic Pieces Weighing over 250,000 Tons Afloat at Sea
Researchers conducted the first global estimate of floating plastic debris in the oceans, finding more than 5 trillion pieces weighing over 250,000 tonnes at the sea surface, establishing a widely cited baseline for understanding the scale of ocean plastic pollution.
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.
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.
River plastic emissions to the world’s oceans
Researchers built a global model to estimate how much plastic waste enters the ocean from rivers, combining data on waste management, population density, and water flow patterns. They estimated that rivers deliver between 1.15 and 2.41 million tonnes of plastic to the oceans annually, with over 74% of emissions occurring between May and October. The top 20 polluting rivers, mostly in Asia, accounted for 67% of the global total, providing key data for targeting cleanup and prevention efforts.
Microplastics in freshwater and terrestrial environments: Evaluating the current understanding to identify the knowledge gaps and future research priorities
This review evaluates the current understanding of microplastic pollution in freshwater and terrestrial environments, which have received far less research attention than marine systems despite being major sources and accumulation zones. Researchers highlight that agricultural areas, urban centers, and wastewater treatment processes are key pathways for microplastic contamination on land. The paper identifies critical knowledge gaps and calls for more research into how microplastics behave and persist in soils and freshwater systems.
On the Construction and Comparison of Difference Schemes
This classic numerical methods paper by Gilbert Strang analyzed the construction and comparison of finite difference schemes for solving differential equations — a foundational computational mathematics reference unrelated to microplastics research that appears to have been included in this dataset in error.
Emerging threats and persistent conservation challenges for freshwater biodiversity
This review provides a comprehensive overview of microplastic pollution in freshwater environments, covering sources, distribution, and ecological impacts in rivers, lakes, and reservoirs. Researchers found that freshwater microplastic contamination is widespread globally but that standardized sampling and analysis methods are still lacking. The study calls for more consistent research approaches so that contamination levels across different water bodies can be meaningfully compared.
Plastic and Human Health: A Micro Issue?
This review evaluates the potential human health impacts of microplastic exposure through food and air, drawing on evidence from particle toxicology and related fields. Researchers note that if inhaled or ingested, microplastics could accumulate in tissues and cause localized inflammation, while chemical additives and adsorbed pollutants may leach out and cause additional toxic effects. The paper emphasizes that chronic, long-term exposure is likely the greater concern, though current data on actual human exposure levels remains limited.
Plastic debris in the open ocean
Researchers collected and characterized plastic debris floating in the open ocean far from coastlines, documenting its abundance, polymer composition, and size distribution, providing early baseline data on the open-ocean plastic pollution problem.
Plasticenta: First evidence of microplastics in human placenta
In a landmark study, researchers detected microplastics in human placental tissue for the first time, finding 12 plastic fragments in placentas from four out of six women with healthy pregnancies. The particles were identified as polypropylene and dyed plastics likely from packaging or cosmetics, raising concerns about potential effects on fetal development and pregnancy.
Predicted growth in plastic waste exceeds efforts to mitigate plastic pollution
This study assessed the impact of waste reduction, waste management, and environmental recovery strategies on global plastic emissions for 173 countries, estimating that 19–23 million metric tons entered aquatic ecosystems in 2016. Even with current governmental commitments, annual emissions could reach 53 million metric tons by 2030, indicating that extraordinary transformation of the global plastics economy is needed.
Microplastic Ingestion by Zooplankton
This study examined whether tiny marine animals called zooplankton can ingest microplastics, and researchers found that thirteen different zooplankton species consumed plastic beads of various sizes. The plastics also stuck to the animals' outer shells and significantly reduced their normal feeding on algae, suggesting that microplastic pollution could disrupt the base of the marine food web.
Microplastics in freshwater systems: A review of the emerging threats, identification of knowledge gaps and prioritisation of research needs
This review synthesizes the growing body of research on microplastic contamination in freshwater rivers, lakes, and sediments, which has received far less attention than marine environments. Researchers found that freshwater microplastic concentrations can rival or exceed those reported in ocean studies, particularly near urban and industrial areas. The study identifies critical knowledge gaps including the lack of standardized sampling methods and limited understanding of how microplastics affect freshwater organisms and ecosystems.
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.
Distribution and importance of microplastics in the marine environment: A review of the sources, fate, effects, and potential solutions
This review synthesized research on the distribution and significance of microplastics across the marine environment, covering sources, transport pathways, ecological interactions, and the state of knowledge on biological and chemical effects.
Microplastics and Nanoplastics in Aquatic Environments: Aggregation, Deposition, and Enhanced Contaminant Transport
This review examined the aggregation, deposition, and transport of microplastics and nanoplastics in aquatic environments, synthesizing how particle properties and water chemistry govern their fate and mobility in rivers, lakes, and oceans.
Human Consumption of Microplastics
Researchers evaluated the American diet and estimated that the average person consumes between 39,000 and 52,000 microplastic particles per year through food alone, with the number rising significantly when inhalation and bottled water consumption are included. The study analyzed data from 26 prior studies covering common food categories. The findings highlight that microplastic exposure through everyday eating and drinking is widespread and substantial.
Environmental exposure to microplastics: An overview on possible human health effects
This review examines the potential health effects of human exposure to microplastics through ingestion, inhalation, and skin contact. Researchers found that microplastic exposure may cause oxidative stress, inflammation, and immune system disruption, with the body's inability to break down synthetic particles potentially leading to chronic inflammation. The study emphasizes that while evidence of harm is growing, microplastic toxicity varies greatly depending on particle properties, concentration, and individual susceptibility.
Microplastics in freshwaters and drinking water: Critical review and assessment of data quality
Researchers critically reviewed fifty studies on microplastics in freshwater and drinking water and found significant quality issues, including inconsistent sampling methods and inadequate contamination controls. Many studies lacked proper quality assurance, making it difficult to draw reliable conclusions about actual contamination levels. The study emphasizes that standardized methods are urgently needed before the true extent of microplastic contamination in drinking water can be assessed.
Atmospheric transport and deposition of microplastics in a remote mountain catchment
Researchers documented atmospheric deposition of microplastic fragments, films, and fibers in a remote, pristine mountain catchment in the French Pyrenees, with particles traveling up to 95 km through the air. This landmark study confirmed that microplastics reach even the most isolated terrestrial environments through wind transport, meaning no ecosystem on Earth is truly free from plastic contamination.
Future scenarios of global plastic waste generation and disposal
Researchers projected global mismanaged plastic waste (plastic that ends up in the environment rather than being properly collected) through 2060, estimating it could triple from roughly 60–99 million tonnes in 2015 to 155–265 million tonnes annually — with African and Asian countries bearing a disproportionate share. Rivers were identified as the dominant pathway carrying 91% of land-based plastic waste to the ocean.