Papers

Concentrations of Tire Additive Chemicals and Tire Road Wear Particles in an Australian Urban Tributary

Researchers measured tire wear particles and their chemical additives in stormwater runoff during severe storms in an Australian urban area. During storms, concentrations of tire-related chemicals spiked more than 40 times, including the compound 6PPD-quinone, which is toxic to aquatic life even at low levels. This study is relevant to human health because tire wear is one of the largest sources of microplastics in cities, and the chemicals they release can contaminate waterways that supply drinking water.

Global assessment of marine plastic exposure risk for oceanic birds

Researchers combined ocean plastic density maps with GPS tracking data for over 7,000 seabirds across 77 petrel species to identify where birds are most likely to encounter and accidentally eat plastic debris. High-risk zones were identified in the Mediterranean, northeast Pacific, and South Atlantic, with threatened species facing disproportionately greater exposure — often in international waters beyond any single country's control.

Food packaging solutions in the post‐per‐ and polyfluoroalkyl substances (PFAS) and microplastics era: A review of functions, materials, and bio‐based alternatives

This review examines how food packaging made with PFAS ("forever chemicals") and conventional plastics can release harmful microplastics and chemicals into the food we eat. The study highlights promising bio-based alternatives made from plant-derived materials that could replace these hazardous packaging materials and reduce our daily exposure to microplastics through food.

Epigenetic impact of endocrine-disrupting chemicals on atherosclerosis

This review examines how endocrine-disrupting chemicals (EDCs), which interfere with the body's hormones, can cause changes to DNA packaging (epigenetics) that promote atherosclerosis and heart disease. These harmful epigenetic changes may even be passed down to future generations. The review also discusses the emerging concern that microplastics and nanoplastics carry EDCs into the body, potentially increasing cardiovascular disease risk through this combined exposure.

Sorption, Extraction, and Characterization of Polycyclic Aromatic Hydrocarbons in Environmentally Weathered Microplastics, Particulate Organic Matter, Sediment, and Fish Species in the Lavaca-Matagorda Bay System

Researchers studied how microplastics carry cancer-causing chemicals called polycyclic aromatic hydrocarbons (PAHs) in the Lavaca-Matagorda Bay system in Texas. They found PAHs attached to microplastics, sediment, and in the digestive systems of three commercially important fish species. This shows that microplastics can act as vehicles for toxic chemicals in coastal waters, potentially affecting the safety of fish that people eat.

How many microplastics do you need to (sub)sample?

This study developed a statistical method to determine the minimum number of suspected microplastic particles researchers need to analyze in order to accurately characterize a sample. The researchers found that analyzing at least 386 randomly selected particles provides a reliable picture of the types of plastics present, with 95% confidence. This standardized approach is important because it helps make microplastic research more consistent and comparable, leading to better understanding of how much microplastic contamination exists in our environment.

Reporting Guidelines to Increase the Reproducibility and Comparability of Research on Microplastics

A group of 23 researchers developed standardized reporting guidelines to improve the reproducibility and comparability of microplastic studies across different laboratories and settings. They created a detailed checklist covering best practices for materials, sampling, sample preparation, identification, and quantification of microplastics. The guidelines aim to address a major bottleneck in the field where inconsistent methods have made it difficult to compare findings or conduct reliable large-scale analyses.

Quantitative assessment of visual microscopy as a tool for microplastic research: Recommendations for improving methods and reporting

Researchers conducted a multi-laboratory study across six countries to assess how accurately visual microscopy identifies microplastics in water samples. They found significant variability between laboratories in particle counts, size measurements, and material identification, with accuracy declining for smaller and transparent particles. The study recommends improved standardization and quality control measures to make microscopy a more reliable tool in microplastic research.

A growing plastic smog, now estimated to be over 170 trillion plastic particles afloat in the world’s oceans—Urgent solutions required

Researchers analyzed ocean plastic data from over 11,000 sampling stations worldwide spanning 1979 to 2019. They estimated that approximately 82 to 358 trillion plastic particles are now floating in the world's oceans, and found a rapid acceleration in plastic pollution since 2005. The study underscores the urgent need for international policy interventions, as current levels suggest existing efforts have not been sufficient to slow the growing plastic burden.

Microplastic exposure disparities in California communities through bottled water consumption

This systematic review found that bottled water contains significantly more microplastics than tap water, and that minority and lower-income communities in California who rely more heavily on bottled water face disproportionately higher exposure. The findings highlight that efforts to avoid contaminated tap water may actually increase microplastic intake.

Microplastic pollution in the water column and benthic sediment of the San Pedro Bay, California, USA

This study conducted one of the first comprehensive surveys of microplastic distribution throughout the entire water column and seafloor sediment in San Pedro Bay, California. Researchers found that microplastic concentrations were significantly higher in nearshore waters than offshore, and that fibers were the most common particle type, providing important baseline data for understanding coastal microplastic pollution.

Enhancing spinach growth and soil microbial health under sulfadiazine and polypropylene exposure through zinc fortification

Researchers found that zinc oxide nanoparticles can effectively reduce the toxic effects of antibiotics and polypropylene microplastics on spinach plants grown in contaminated soil. The zinc treatment lowered oxidative stress markers by 18-28% while boosting the activity of protective enzymes in roots and shoots. The study suggests that zinc supplementation could be a practical strategy for improving crop health in soils polluted with microplastics and pharmaceutical residues.

Microplastic exposure elicits sex-specific atherosclerosis development in lean low-density lipoprotein receptor-deficient mice

Researchers found that microplastic exposure significantly increased atherosclerosis in male mice by 63% in key arteries, while female mice were largely unaffected, revealing an unexpected sex-specific cardiovascular response. Single-cell analysis showed that microplastics altered blood vessel cell behavior in ways that promote plaque buildup, with similar pro-inflammatory effects confirmed in human endothelial cells grown in the lab.

Using digital pathology to standardize and automate histological evaluations of environmental samples

Researchers explored how digital pathology tools, widely used in human medicine, could be applied to automate and standardize the examination of environmental tissue samples. They found that digital analysis of whole slide images can reduce subjectivity and variability compared to traditional microscopy methods. The study suggests that adopting digital pathology in environmental monitoring could improve consistency in assessing ecosystem health.

Transfer learning enables robust prediction of cellular toxicity from environmental micro- and nanoplastics

Researchers developed a transfer learning approach to predict cellular toxicity from micro- and nanoplastics, overcoming the challenge of limited experimental data. By pre-training a model on a large nanoparticle dataset and fine-tuning it on plastic-specific data, they achieved strong predictive accuracy. The tool allows researchers to estimate the toxicity of various plastic particles based on their physical and chemical properties without extensive new experiments.

Carbendazim adsorption on polyethylene microplastics and the toxicity mechanisms on cotton plants, soil enzyme activity and rhizosphere bacterial community under combined stress conditions

Patterns of microparticles in blank samples: A study to inform best practices for microplastic analysis

Researchers analyzed blank laboratory samples from 12 different labs to understand how much background contamination affects microplastic analysis results. They found that blank samples contained between 7 and 511 particles each, primarily blue and clear fibers, revealing significant variability in lab contamination levels. The study recommends that researchers report and subtract blank contamination data from their results to improve the accuracy and comparability of microplastic studies.

Learning from natural sediments to tackle microplastics challenges: A multidisciplinary perspective

Researchers drew on decades of sediment science to propose seven research priorities for improving microplastic studies, including better particle description, transport modeling, and toxicity assessment methods adapted from geology. This cross-disciplinary approach could accelerate understanding of how microplastics move through rivers, oceans, and ecosystems and how they harm living organisms.

A Review on Remediation Technology and the Remediation Evaluation of Heavy Metal-Contaminated Soils

This review surveys the main approaches to cleaning up heavy metal contamination in soils, including physical, chemical, biological, and combined methods, discussing the strengths and limitations of each. Researchers note that standards and evaluation methods for determining when soil has been adequately remediated are still not well established. The study calls for more scientific research into post-remediation assessment to ensure cleanup efforts are truly effective.

Effects of Shape on Interaction Dynamics of Tetrahedral Nanoplastics and the Cell Membrane

Researchers used computer simulations to model how tetrahedral-shaped nanoplastics, which resemble environmentally released plastic fragments, interact with cell membranes. The study found that these sharp-edged particles were readily taken up by lipid membranes, with their movement becoming increasingly constrained as particle size grew, providing fundamental insights into how plastic particle shape affects cellular uptake.

Negligible effects of microplastics on animal fitness and HOC bioaccumulation in earthworm Eisenia fetida in soil

Researchers exposed earthworms to polyethylene and polystyrene microplastics at concentrations up to 20 percent of soil dry weight and measured oxidative stress biomarkers. While the highest concentration caused some biochemical changes, no significant effects were observed at 10 percent or below, which covers most realistic environmental scenarios. The study also found that microplastics reduced the bioaccumulation of PAHs and PCBs in earthworm tissues, suggesting that the particles may actually limit the uptake of certain organic pollutants in soil organisms.

Microplastic Spectral Classification Needs an Open Source Community: Open Specy to the Rescue!

Researchers developed Open Specy, a free, open-source tool for spectral classification of microplastics using Raman and infrared spectroscopy. The platform addresses a critical gap in microplastic research by providing accurate, cost-free identification tools and a community-shared spectral library that better represents the diversity of environmental microplastic pollutants.

Incineration-Generated Polyethylene Micro-Nanoplastics Increase Triglyceride Lipolysis and Absorption in an In Vitro Small Intestinal Epithelium Model

Researchers found that incineration-generated polyethylene micro-nanoplastics increased fat digestion by 33% and fat absorption by up to 147% in a laboratory model of the small intestine. The study suggests that lipid and protein coronas forming on the plastic particle surfaces may facilitate lipase activity, potentially altering how the body processes dietary fats.

Open Specy 1.0: Automated (Hyper)spectroscopy for Microplastics

Researchers released Open Specy 1.0, an updated open-source software tool for automated spectroscopic analysis of microplastics, featuring new algorithms for batch processing and hyperspectral image analysis. The tool includes a library of over 40,000 Raman and FTIR reference spectra and two machine learning classifiers for polymer identification. The study demonstrates that this freely available tool can significantly reduce the time required for microplastic spectral analysis, which traditionally takes days per sample.