Papers

Responses of <i>Hyalella azteca</i> to acute and chronic microplastic exposures

Researchers exposed the freshwater amphipod Hyalella azteca to polyethylene microplastics in both short-term and long-term laboratory tests. They found that chronic exposure over 10 days to high concentrations of the smallest microplastic particles reduced survival and reproduction. The study provides some of the first data on how microplastics affect freshwater invertebrates over extended periods, highlighting the importance of particle size and exposure duration.

Communicating Confidence in the Reliability of Micro- and Nanoplastic Identification in Human Health Studies

This paper proposes a framework for improving confidence in how scientists identify and measure micro- and nanoplastics in human tissues and body fluids. The authors argue that studies need to use multiple complementary analysis methods and clearly report their limitations to produce reliable data. Better standardization in detection methods is critical for accurately assessing how much microplastic is actually inside people's bodies and what health risks it may pose.

Microplastic Accumulation in Hong Kong’s Marine Sediment: Spatial Pattern and Potential Sources

Researchers conducted a comprehensive survey of microplastics in marine sediments across Hong Kong's waters. They found microplastics at every sampling site, with fibers and fragments being the most common forms and polypropylene and polyethylene the dominant plastics. The spatial patterns suggest that coastal urbanization and water circulation are key factors driving where microplastics accumulate in sediments.

Triclosan: A Widespread Environmental Toxicant with Many Biological Effects

This review examines triclosan, a broad-spectrum antimicrobial agent found in personal care products and various consumer materials. The study discusses how triclosan's chemical properties of bioaccumulation and resistance to degradation have made it a widespread environmental contaminant detected in aquatic systems, where it can interact with other pollutants including microplastics.

Membrane Lipid Remodeling Modulated Maize Response to Environmentally Relevant Atmospheric Nanoplastics

Researchers exposed maize leaves to polystyrene nanoplastics with different surface modifications at environmentally relevant doses and found that amino-modified particles caused the strongest growth inhibition. All nanoplastics entered the leaves through stomata and accumulated in a dose-dependent manner, significantly suppressing the production of 31 membrane lipids involved in cell structure and signaling. The study reveals that atmospheric nanoplastics can disrupt membrane lipid metabolism in crops, providing molecular-level evidence of how airborne plastic particles may affect agricultural plants.

Machine-Learning-Accelerated Prediction of Water Quality Criteria for Microplastics

Researchers developed a machine learning framework to predict microplastic toxicity in aquatic organisms and derive water quality criteria for five common polymer types. The random forest model outperformed other algorithms, with particle size, density, and aquatic species group accounting for 72% of prediction variability. The study found that polystyrene and PET exhibited the greatest toxicity, and that microplastics were generally more toxic in freshwater than saltwater environments.

Integrated Chemical and Hazard Assessment of Plastic Pellets from the <i>Toconao</i> Spill (Galicia, Spain) Indicates Potential for Environmental Harm

Researchers analyzed plastic pellets from a major 2023 shipping spill off the coast of Portugal, identifying over 50 chemical substances and testing their toxicity on algae, copepods, zebrafish, and human cells. The study found significant harm to algae and copepods, including growth inhibition and immobilization, while zebrafish embryos and human cells showed minimal or modest effects, underscoring the complex chemical risks that pellet spills pose to marine ecosystems.

STOWAWAYS

This educational overview explains how plastics degrade into micro- and nanoplastics through photodegradation and microbial processes, describes how these particles enter food and drinking water, and summarizes documented human health concerns from exposure.

Identification of microplastic-associated microbial communities from various stages of wastewater treatment and recipient surface waters using MALDI-TOF mass spectrometry

Researchers deployed six polymer types at different stages of wastewater treatment across three Hungarian plants and used MALDI-TOF mass spectrometry to identify the bacteria colonizing microplastic surfaces, finding distinct microbial communities that may act as vectors for antibiotic resistance.

Review of Microplastics in Cosmetics: Scientific background on a potential source of plastic particulate marine litter to support decision-making

Plastic in Cosmetics: Are we polluting the environment through our personal care?: Plastic ingredients that contribute to marine microplastic litter

T20 Task Force Circular Economy: Circular economy measures to keep plastics and their value in the economy, avoid waste and reduce marine litter: Policy Brief for the G20, The 2030 Agenda Climate & Finance Trade & Investment

This T20 policy task force report proposed circular economy measures to reduce plastic pollution entering oceans, including extended producer responsibility, improved collection systems, and design standards for recyclability. It argues that current linear approaches to plastics are economically unsustainable as well as environmentally harmful.

Chemical additives in weathered microplastic in the marine environment occurrence and risk:occurrence and risk

Researchers measured chemical additives — including phthalate plasticizers known to disrupt hormones — in polyurethane and PVC plastics before and after four months of weathering in a Norwegian fjord, finding that concentrations reached up to 1,000 nanograms per gram of plastic and that risk to marine organisms remained low, though non-target screening flagged additional unidentified compounds of concern.