Previous successes and untapped potential of pyrolysis–GC/MS for the analysis of plastic pollution

Analytical and Bioanalytical Chemistry, Journal Year: 2023, Volume and Issue: 415(15), P. 2873 - 2890

Published: April 10, 2023

Language: Английский

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Airborne microplastic contamination across diverse university indoor environments: A comprehensive ambient analysis

Air Quality Atmosphere & Health, Journal Year: 2024, Volume and Issue: 17(9), P. 1851 - 1866

Published: March 20, 2024

Abstract Microplastics (MPs) have become a growing concern in the context of environmental pollution, with an increasing focus on their presence indoor environments, including university facilities. This study investigates and characteristics MPs different environments. Initial examination ambient involved physical characterization through optical microscopy, focusing classifying by shape color. Various types MPs, fibers, fragments, pellets, foams, films, lines, were identified, most common colors being black, red, blue, brown. Fragments predominant type found, although accurately quantifying numbers proved challenging due to dense sample content. These displayed rough irregular margins suggestive abrasion. Subsequent chemical elemental was conducted using micro-Raman SEM-EDX, revealing 25 PA 66, PTFE, PP, HDPE, PE. The indicates that inhabitants are exposed airborne (≥ 2.5–336.89 μm) at inhalation rates 13.88–18.51 MPs/m 3 180–240 daily. exhibited significant variations size, distribution varied among environments studied. SEM-EDX analysis revealed elements identified C, O, F, Na, Cl, Al, Si, others consistently detected. research is first comprehensively analyze nine active sampling. Identifying reducing MP contamination these facilities might stimulate more awareness, promote extensive scientific investigation, facilitate development informed policies.

Language: Английский

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Analysis of aged microplastics: a review

Environmental Chemistry Letters, Journal Year: 2024, Volume and Issue: 22(4), P. 1861 - 1888

Published: April 4, 2024

Abstract Microplastics are emerging contaminants that undergo progressive aging under environmental conditions such as sunlight irradiation, mechanical forces, temperature variations, and the presence of biological organisms. Since modifies microplastic properties, their own toxicity trapped pollutants, advanced methods to analyze microplastics required. Here we review with focus on process, qualitative identification, quantitative characterization, chemometrics. Qualitative identification is done by techniques, thermal e.g., degradation gas chromatography–mass spectrometry, spectral infrared, Raman, fluorescent, laser techniques. Quantitative characterization microscopy mass spectrometry. Microplastic results in a series surface physical changes, biofilm formation, chemical oxidation, alternation, deterioration. Changes properties allow differentiate aged microplastics. Infrared Raman spectroscopy rapid sensitive for complex samples. Combining two techniques preferable accurate detection categorization.

Language: Английский

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How can contamination be prevented during laboratory analysis of atmospheric samples for microplastics?

Environmental Monitoring and Assessment, Journal Year: 2024, Volume and Issue: 196(2)

Published: Jan. 17, 2024

Language: Английский

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Microplastics in indoor deposition samples in university classrooms

Discover Environment, Journal Year: 2024, Volume and Issue: 2(1)

Published: March 18, 2024

Abstract The pollution caused by microplastics (MPs) is a growing concern on global scale, especially considering the significant proportion of time that individuals spend indoors. contamination in question has potential to directly impact human population through exposure indoor dust and air. This research undertook comprehensive analysis deposition MPs university classrooms, employing various investigative tools. present study aimed comprehensively analyze physical chemical properties found classrooms. Analyzing samples under stereomicroscope, predominant were identified as fibers varied colors, mainly attributed clothing. Sizes these significantly across different with general average size range 120–2222 µm. observed morphological changes MPs, including cracks grooves, hint at degradation into nanosized plastics over time. observation raises concerns about increased concentrations nanoplastics environments. Using µRaman analysis, eleven types identified, potentially originating from clothing, shoes, stationery. majority polyamide 6, polypropylene, 12. scanning electron microscope energy-dispersive X-ray spectroscopy (SEM–EDX) technique unveiled elemental composition carbon, fluorine, oxygen being dominant. findings align past studies but highlight need understand MPs' structural components any possible contaminants. Compared existing literature, this adopts methodological approach combining optical microscopy, µRaman, SEM–EDX, enriching knowledge MP aiding future directions.

Language: Английский

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Unravelling the microplastic contamination: A comprehensive analysis of microplastics in indoor house dust

Indoor and Built Environment, Journal Year: 2024, Volume and Issue: 33(8), P. 1519 - 1541

Published: April 17, 2024

Microplastics (MPs), measuring less than 5 mm, have been causing environmental concerns in aquatic ecosystems, and work has done indoor environments, where humans spend most of their lives. This finding revealed a diverse range MPs within house dust samples. These encompassed fibres, fragments, foams, pellets films. Due to the ubiquity textile-based items, fibres are common MP. The different colours like black, red, blue, yellow, white brown. study there were substantial differences MP sizes across households. average size was 178.87–3713.99 µm. One hundred eighteen particles identified as MPs. 22 types MPs, shedding light on these materials’ extensive sources applications everyday household items. environments raise about potential human exposure underscore need for further research into health implications. found samples low-density polyethylene, polypropylene, polyamide, polyvinyl chloride, high-density polyethylene polystyrene. Carbon, nitrogen, fluorine, sodium, sulphur, potassium, calcium, zinc, oxygen magnesium elements all Compared with active sampling, slightly more

Language: Английский

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Hyperspectral imaging as an emerging tool to analyze microplastics: A systematic review and recommendations for future development

Microplastics and Nanoplastics, Journal Year: 2021, Volume and Issue: 1(1)

Published: Aug. 6, 2021

Abstract A central challenge in microplastics (MP, diameter < 5 mm) research is the analysis of small plastic particles an efficient manner. This review focuses on recent application infrared hyperspectral imaging (HSI) to analyze MP. We provide a narrative context for understanding technical principles HSI followed by systematic and discussion variety approaches apply MP research, including instrumentation, data collection analysis. was successfully applied dry > 250 μm, with drastic improvements time as compared best available technology, such Fourier transform (FT-IR) Raman spectroscopy. Primary challenges we identified through include improving spatial resolution detect smaller development robust models Parameters practices reporting quality assurance control measures are summarized recommendations made future research. conclude that promising technology but requires adaptation this new application.

Language: Английский

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High levels of microplastics in commercial salt and industrial salterns in Sri Lanka

Marine Pollution Bulletin, Journal Year: 2021, Volume and Issue: 174, P. 113239 - 113239

Published: Dec. 22, 2021

Language: Английский

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Spatial and temporal variations of microplastic concentrations in Portland's freshwater ecosystems

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 833, P. 155143 - 155143

Published: April 9, 2022

While microplastics are a pollutant of growing concern in various environmental compartments, less is known regarding the sources and delivery pathways urban rivers. We investigated relationship between microplastic concentrations spatiotemporal factors (e.g., land use, arterial road length, water velocity, precipitation) two watersheds along an urban-rural gradient Portland metropolitan area. Samples were collected August, September, February analyzed for total count type. Nonparametric statistics used to evaluate potential relationships with explanatory variables, derived at both subwatershed near stream scales. In significantly higher than February. August also negatively correlated flow rate, suggesting that lower rates may have facilitated accumulation microplastics. Smaller size particles (< 100 μm) found more September February, while larger dominant other months. Microplastic positively related 24-h antecedent precipitation Negative correlations existed wet season agricultural lands level. The results indicate variables strongly influence presence abundance Portland's waterways subwatershed-scale variables. Fragments most commonly observed morphology, dominance gray polymer polyethylene. findings this study can inform management decisions waste identify hotspots pollution benefit from remediation.

Language: Английский

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Automated analysis of microplastics based on vibrational spectroscopy: are we measuring the same metrics?

Analytical and Bioanalytical Chemistry, Journal Year: 2022, Volume and Issue: 414(11), P. 3359 - 3372

Published: Feb. 15, 2022

Language: Английский

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