Automatic Identification of Individual Nanoplastics by Raman Spectroscopy Based on Machine Learning

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(46), P. 18203 - 18214

Published: July 3, 2023

The increasing prevalence of nanoplastics in the environment underscores need for effective detection and monitoring techniques. Current methods mainly focus on microplastics, while accurate identification is challenging due to their small size complex composition. In this work, we combined highly reflective substrates machine learning accurately identify using Raman spectroscopy. Our approach established spectroscopy data sets nanoplastics, incorporated peak extraction retention processing, constructed a random forest model that achieved an average accuracy 98.8% identifying nanoplastics. We validated our method with tap water spiked samples, achieving over 97% accuracy, demonstrated applicability algorithm real-world environmental samples through experiments rainwater, detecting nanoscale polystyrene (PS) polyvinyl chloride (PVC). Despite challenges processing low-quality nanoplastic spectra study potential forests distinguish from other particles. results suggest combination holds promise developing particle strategies.

Language: Английский

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The fate of microplastic pollution in the Changjiang River estuary: A review

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 425, P. 138970 - 138970

Published: Sept. 21, 2023

Language: Английский

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Atmospheric emissions of microplastics entrained with dust from potential source regions

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 488, P. 137509 - 137509

Published: Feb. 4, 2025

Language: Английский

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Atmospheric microplastic transport and deposition to urban and pristine tropical locations in Southeast Asia

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 902, P. 166153 - 166153

Published: Aug. 8, 2023

Language: Английский

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Characteristics, sources and influencing factors of atmospheric deposition of microplastics in three different ecosystems of Beijing, China

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 883, P. 163567 - 163567

Published: April 22, 2023

Language: Английский

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Permeable pavement blocks as a sustainable solution for managing microplastic pollution in urban stormwater

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 966, P. 178649 - 178649

Published: Feb. 1, 2025

Language: Английский

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Modeling atmospheric microplastic cycle by GEOS-Chem: An optimized estimation by a global dataset suggests likely 50 times lower ocean emissions

One Earth, Journal Year: 2023, Volume and Issue: 6(6), P. 705 - 714

Published: June 1, 2023

Language: Английский

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Vertical distribution and transport of microplastics in the urban atmosphere: New insights from field observations

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 895, P. 165190 - 165190

Published: June 28, 2023

Language: Английский

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Suspended and deposited microplastics in the coastal atmosphere of southwest England

Chemosphere, Journal Year: 2023, Volume and Issue: 343, P. 140258 - 140258

Published: Sept. 24, 2023

Atmospheric microplastics (MPs) have been sampled from coastal southwest England during twelve periods over a 42-day timeframe in late autumn. MPs were dominated by fibres, with foams, fragments and pellets also observed. The majority of fibres identified as the semisynthetic polymer, rayon, while other shapes various petroleum-based thermoplastics (including polyvinyl acetate, alcohol, polyamide polyester) paints. MP concentrations suspended air ranged 0.016 to 0.238 items per m3 but displayed no clear dependence on wind speed or direction. Total depositional fluxes 0.47 3.30 m-2 h-1 showed conditions electrical conductivity precipitation (as measure maritime influence). However, concentration deposited rainwater was inversely related rainfall volume, suggesting that incipient acts efficiently washout microplastics. A comparison size, shape polymer type suggests larger constructed acrylic are preferentially removed atmosphere relative smaller, non-fibrous particles polyester. quantitative provided estimates location- environment-specific net settling velocities between about 7 180 m corresponding residence times for an column 5000 30 700 h. findings study contribute improved understanding occurrence, transport deposition more generally.

Language: Английский

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Modelled sources of airborne microplastics collected at a remote Southern Hemisphere site

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 325, P. 120437 - 120437

Published: March 1, 2024

Airborne microplastics have emerged in recent years as ubiquitous atmospheric pollutants. However, data from the Southern Hemisphere, and remote regions particular, are sparse. Here, we report airborne microplastic deposition fluxes measured during a five-week sampling campaign at site foothills of Alps New Zealand. Samples were collected over 24-hour periods for first week 7-day thereafter. On average, (MP) six times larger (150 MP m−2 day−1) than (26 day−1), highlighting importance frequency collector design to limit particle resuspension. Previous studies, many which used weekly frequencies or longer, may substantially underestimated fluxes, depending on study design. To identify likely sources deposited microplastics, performed simulations with global dispersion model coupled an emissions inventory microplastics. Modelled good agreement observations, potential this method tracing globally. Modelling indicates that sea-spray was dominant source when underwent long-range transport, small contribution road dust.

Language: Английский

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