There's something in the air: A review of sources, prevalence and behaviour of microplastics in the atmosphere

The Science of The Total Environment, Год журнала: 2023, Номер 874, С. 162193 - 162193

Опубликована: Фев. 23, 2023

Literature regarding microplastics in the atmosphere has advanced recent years. However, studies have been undertaken isolation with minimal collaboration and exploration of relationships between air, deposition dust. This review collates concentrations (particle count mass-based), shape, size polymetric characteristics for ambient air (m3), (m2/day), dust (microplastics/g) snow (microplastics/L) from 124 peer-reviewed articles to provide a holistic overview analysis our current knowledge. In summary, featured <1 >1000 microplastics/m3 (outdoor) microplastic/m3 1583 ± 1181 (mean) (indoor), consisting polyethylene terephthalate, polyethylene, polypropylene. No difference (p > 0.05) was observed indoor outdoor or minimum 0.5). Maximum microplastic sizes were larger indoors < 0.05). Deposition ranged 0.5 1357 microplastics/m2/day 475 19,600 including polystyrene, polypropylene, terephthalate. Concentrations varied 0.05), being more abundant indoors, potentially closer sources/sinks. maximum reported within Road 2 477 microplastics/g (mean), polyvinyl chloride, Mean microplastic/g (remote desert) 18 225 microplastics/g, comprised polyamide, Snow 0.1 30,000 microplastics/L, containing 10 67,000 The smaller Although comparability is hindered by differing sampling methods, analytical techniques, polymers investigated, spectral libraries inconsistent terminology, this provides synopsis knowledge date atmospheric microplastics.

Язык: Английский

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Hot or not: systematic review and laboratory evaluation of the hot needle test for microplastic identification

Microplastics and Nanoplastics, Год журнала: 2023, Номер 3(1)

Опубликована: Апрель 24, 2023

Abstract Microplastics are small (< 5 mm) synthetic polymers that a contaminant of emerging concern and can be difficult to identify due their diversity in size, shape composition. The hot needle test, or point helps researchers suspected microplastics under optical microscopy by probing physical melt deformation behavior, is low-cost practical method for widespread use. However, our knowledge the accuracy this test has not been fully evaluated. We noted articles commonly referenced do have detailed description nor evaluation accuracy. To address gap, we took mixed methods approach describe conditions which performs accurately, including systematic literature review, reporting response known fibers point, performance both controlled environmental samples. In single-blind trial applying different set synthetic, semi-synthetic natural fibers, some were correctly identified > 70% time. While cotton fiber results less consistently 65% correct), was improved (82–100% correct) second when clearer, updated guidance given regarding difference between “pass” “fail” response, showing potential help analysts avoid false positives. Cellulose acetate from cigarette filters most challenging because although material may melt, individual heat varies observe smaller microfibers. Reported confirmation rates spectroscopy pass vary widely literature. Using criteria, 90% selected samples (water, sediment) confirmed Raman microscopy. It recommended assess against standards target background materials like report criteria used studies optimally include spectroscopic verification higher confidence.

Язык: Английский

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Plastic rain—Atmospheric microplastics deposition in urban and peri-urban areas of Patna City, Bihar, India: Distribution, characteristics, transport, and source analysis

Journal of Hazardous Materials, Год журнала: 2023, Номер 458, С. 131883 - 131883

Опубликована: Июнь 19, 2023

Язык: Английский

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A comprehensive review of urban microplastic pollution sources, environment and human health impacts, and regulatory efforts

The Science of The Total Environment, Год журнала: 2024, Номер 946, С. 174297 - 174297

Опубликована: Июнь 28, 2024

Язык: Английский

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Man-made natural and regenerated cellulosic fibres greatly outnumber microplastic fibres in the atmosphere

Environmental Pollution, Год журнала: 2022, Номер 310, С. 119808 - 119808

Опубликована: Авг. 1, 2022

Язык: Английский

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Examining the release of synthetic microfibres to the environment via two major pathways: Atmospheric deposition and treated wastewater effluent

The Science of The Total Environment, Год журнала: 2022, Номер 857, С. 159317 - 159317

Опубликована: Окт. 8, 2022

Язык: Английский

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Customizable Machine-Learning Models for Rapid Microplastic Identification Using Raman Microscopy

Analytical Chemistry, Год журнала: 2022, Номер 94(49), С. 17011 - 17019

Опубликована: Ноя. 29, 2022

Raman spectroscopy is commonly used in microplastics identification, but equipment variations yield inconsistent data structures that disrupt the development of communal analytical tools. We report a strategy to overcome issue using database high-resolution, full-window spectra. This approach enables customizable tools be easily created─a feature we demonstrate by creating machine-learning classification models open-source random-forest, K-nearest neighbors, and multi-layer perceptron algorithms. These >95% accuracy when trained on spectroscopic with downgraded 1, 2, 4, or 8 cm-1 spacings shift. The can maintained even non-ideal conditions, such as sampling rates 1 kHz microplastic particles are outside focal plane laser. creation robust adaptable varied spectrometer setups experimental needs.

Язык: 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, Год журнала: 2023, Номер 902, С. 166153 - 166153

Опубликована: Авг. 8, 2023

Язык: Английский

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Sources, analysis, and health implications of atmospheric microplastics

Emerging contaminants, Год журнала: 2023, Номер 9(3), С. 100233 - 100233

Опубликована: Май 3, 2023

Microplastics (MPs) are emerging environmental contaminants pervasive in the environment. Studies have revealed that majority of airborne MPs form fiber. Inhaled atmospheric adversely impact human health, causing inflammation and oxidative stress. Atmospheric may also carry hazardous chemical pollutants addition to heavy metals. Many research studies been conducted about MPs’ presence components, however questions identification remained unanswered. Based on mentioned gaps, this study examined sources abundance atmosphere their generation, accumulation, fate. The paper further evaluates current methods for identifying assessing health According findings, there flaws complexity assessment technical procedures, which challenges data comparability dependability. In order ensure reliability, needs be expressed using a unified standard methodology. Innovative well-established methods, strategies minimize impacts MPs, appropriate steps reduce global pollution required state MPs. It provides an overview MPs' characteristics, sources, transmission deposition mechanisms. Advances bacterial degradation, sunlight-driven photocatalysts, fuels, biodegradable plastics could revolutionize future reducing plastic pollution. Future should include more various aspects Despite several many regarding from perspectives COVID-19 One Health still need answered. This will help key stakeholders policymakers safeguarding public environment threats posed by

Язык: Английский

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First quantification and chemical characterization of atmospheric microplastics observed in Seoul, South Korea

Environmental Pollution, Год журнала: 2023, Номер 327, С. 121481 - 121481

Опубликована: Март 30, 2023

Язык: Английский

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