Accumulation of microplastics in predatory birds near a densely populated urban area

The Science of The Total Environment, Год журнала: 2024, Номер 917, С. 170604 - 170604

Опубликована: Фев. 2, 2024

Язык: Английский

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Using a citizen science approach to assess nanoplastics pollution in remote high-altitude glaciers

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 13, 2025

Nanoplastics are suspected to pollute every environment on Earth, including very remote areas reached via atmospheric transport. We approached the challenge of measuring environmental nanoplastics by combining high-sensitivity TD-PTR-MS (thermal desorption-proton transfer reaction-mass spectrometry) with trained mountaineers sampling high-altitude glaciers ("citizen science"). Particles < 1 μm were analysed for common polymers (polyethylene, polyethylene terephthalate, polypropylene, polyvinyl chloride, polystyrene and tire wear particles), revealing nanoplastic concentrations ranging 2–80 ng mL− at five 14 sites. The dominant polymer types found in this study wear, particles (41%, 28% 12%, respectively). Lagrangian dispersion modelling was used reconstruct possible sources micro- emissions those observations, which appear lie largely west Alps. France, Spain Switzerland have highest contributions modelled emissions. citizen science approach be feasible providing strict quality control measures place, is an effective way able collect data from inaccessible regions across world.

Язык: Английский

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Integrating C–H Information to Improve Machine Learning Classification Models for Microplastic Identification from Raman Spectra

Analytical Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

Research has shown microplastic particles to be pervasive pollutants in the natural environment, but labor-intensive sample preparation, data acquisition, and analysis protocols continue necessary navigate their diverse chemistry. Machine learning (ML) classification models have promise for identifying microplastics from Raman spectra, all attempts date focused on lower energy "fingerprint" region of spectrum. We explore strategies improve ML based k-nearest-neighbor algorithm by including other regions spectra. The information content inherent C–H bonds, which occur higher frequency 2500–3600 cm–1, is found particularly powerful improving model performance. Variations relative intensity peaks arising vibrations identification capabilities plastics that fingerprint alone struggles with, such as resolving acrylonitrile butadiene styrene polystyrene poly(vinyl chloride), polyurethane, polyoxymethylene. Testing both acquire analyze across two explored efficacy compatibility with real-world sampling restrictions. find localized normalization independently acquired regions, provides most direct effective route

Язык: Английский

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Microplastics in aquatic ecosystems: Detection, source tracing, and sustainable management strategies

Ecotoxicology and Environmental Safety, Год журнала: 2025, Номер 291, С. 117883 - 117883

Опубликована: Фев. 1, 2025

Microplastics (MPs) are emerging contaminants characterized by persistence, cross-media transport, and complex pollutant interactions, posing serious ecotoxicological risks to ecosystems human health. Effective MPs management requires multi-faced, long-term, strategies involving targeted sampling, quantitative detection, comprehensive risk assessments, all of which entail significant resource investment. Despite advancements in remediation technologies, a holistic governance framework integrating these innovations remains underdeveloped. This review synthesizes current knowledge on MPs, elaborating their diverse morphologies, degradation pathways, role as vectors for toxic substances. State-of-the-art extraction techniques evaluated this article, including micropore adsorption using nanocomposites, alongside the incorporation advanced analytical tools such spectroscopic methods, electron microscopy, bioinformatics augment environmental forensics. also underscores necessity formulating robust global policies regulate pollution discusses potential biodegradation thermal sustainable solutions removal. By promoting an interdisciplinary approach, advocates coordinated response, science, policy frameworks, waste mitigate escalating impact well-being.

Язык: Английский

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Variation of microplastics in the shore sediment of high-altitude lakes of the Indian Himalaya using different pretreatment methods

The Science of The Total Environment, Год журнала: 2022, Номер 849, С. 157870 - 157870

Опубликована: Авг. 6, 2022

Microplastics pollution is a growing environmental concern. However, microplastics studies in high altitude remote lakes are scarce. In this study, was assessed the shore sediment of three Ladakh Indian Himalaya, namely Pangong Lake, Tsomoriri Lake and Tsokar Lake. Sampling performed August 2019. Two different pretreatment methods were implemented with samples from same sites, resulting two sets samples. One set pretreated utilizing enzymatic degradation together Fenton reactions. Another sites 30 % hydrogen peroxide (H2O2) reaction. Enzymatically resulted higher concentrations than H2O2 samples, which indicated that varies even among site procedure may impact on reported concentrations. Considering both microplastic concentration 160-1000 MP/kg dw 960-3800 Blank correction based limit detection quantification at some studied quantification. The findings study Himalaya contaminated microplastics. addition, comparison using illustrated importance harmonization to enable reliable data. Therefore, contributes towards an assessment high-altitude Himalaya. attributed clearer understanding regarding need demonstrated reporting complete information research.

Язык: Английский

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Nanoplastics in the soil environment: Analytical methods, occurrence, fate and ecological implications

Environmental Pollution, Год журнала: 2022, Номер 317, С. 120788 - 120788

Опубликована: Дек. 5, 2022

Soils play a very important role in ecosystems sustainability, either natural or agricultural ones, serving as an essential support for living organisms of different kinds. However, the current context extremely high plastic pollution, soils are highly threatened. Plastics can change chemical and physical properties may also affect biota. Of particular importance is fact that plastics be fragmented into microplastics and, to final extent nanoplastics. Due their low size surface area, nanoplastics even have higher impact soil ecosystems. Their transport through edaphic environment regulated by physicochemical particles themselves, anthropic activities biota interactions. degradation associated with series mechanical, photo-, thermo-, bio-mediated transformations eventually conducive mineralisation. tiny precisely main setback when it comes sampling subsequent processes identification quantification, albeit pyrolysis coupled gas chromatography-mass spectrometry other spectroscopic techniques proven useful analysis. Another issue consequence minuscule lies uptake plants roots ingestion dwelling fauna, producing morphological deformations, damage organs physiological malfunctions, well risks entrance food chain, although conclusions not always consistent show same pattern effects. Thus, given omnipresence seriousness menace, this review article pretends provide general overview most recent data available regarding determination, occurrence, fate effects soils, special emphasis on ecological implications.

Язык: Английский

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Plastics and Micro/Nano-Plastics (MNPs) in the Environment: Occurrence, Impact, and Toxicity

International Journal of Environmental Research and Public Health, Год журнала: 2023, Номер 20(17), С. 6667 - 6667

Опубликована: Авг. 28, 2023

Plastics, due to their varied properties, find use in different sectors such as agriculture, packaging, pharmaceuticals, textiles, and construction, mention a few. Excessive of plastics results lot plastic waste buildup. Poorly managed (as shown by heaps on dumpsites, free spaces, along roads, marine systems) the landfills, are just fraction environment. A complete picture should include micro nano-plastics (MNPs) hydrosphere, biosphere, lithosphere, atmosphere, current extreme weather conditions (which effects climate change), wear tear, other factors promote MNP formation. MNPs pose threat environment more than pristine counterparts. This review highlights entry occurrence primary secondary soil, water air, together with aging. Furthermore, uptake internalization, plants, animals, humans discussed, toxicity effects. Finally, future perspective conclusion given. The material utilized this work was acquired from published articles internet using keywords waste, degradation, microplastic, aging, toxicity.

Язык: Английский

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Classification of household microplastics using a multi-model approach based on Raman spectroscopy

Chemosphere, Год журнала: 2023, Номер 325, С. 138312 - 138312

Опубликована: Март 10, 2023

Язык: Английский

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Fabrication of eco-friendly Cu/Co-LDHs-based superhydrophobic sponge and efficiently synchronous removal of microplastic, dyestuff, and oil

Journal of Cleaner Production, Год журнала: 2023, Номер 400, С. 136708 - 136708

Опубликована: Март 9, 2023

Язык: Английский

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Microplastics in biotic and abiotic compartments of high-mountain lakes from Alps

Ecological Indicators, Год журнала: 2023, Номер 150, С. 110215 - 110215

Опубликована: Апрель 6, 2023

Microplastic (MP) pollution is a major environmental concern for mountain ecosystem and high-mountain lakes in particular, which are recognized indicators of global change. In this study, the presence MPs was assessed abiotic (water sediment) biotic (zooplankton, tadpoles, fish) compartments two (Upper Lake Balma Lower Balma) Cottian Alps (northwest Italy). No were found water zooplankton samples, whereas mean sediment samples 1.33 ± 0.67 items/m3 1.75 0.62 Upper Balma, respectively. The tadpoles Rana temporaria 0.33 0.58 items/individual 0.66 number items gastrointestinal tract (GIT) fish (Salvelinus fontinalis) considerably higher specimens from (0.45 items/g GIT) than those (0.20 GIT). There negative relationship between size (weight age) abundance GIT fish, indicating that young accumulated more MP probably due to high prey ingestion rate compared adults. same color (blue, white, black), shape (fibers fragments), chemical type (polypropylene polyethylene) both lakes. Our findings suggest use S. fontinalis as an indicator Further studies needed better understand sources effects these remote ecosystems.

Язык: Английский

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