Fourier Transform Infrared Spectroscopy to Assess the Degree of Alteration of Artificially Aged and Environmentally Weathered Microplastics

Polymers, Год журнала: 2023, Номер 15(4), С. 911 - 911

Опубликована: Фев. 11, 2023

Fourier transform infrared (FTIR) is a spectroscopy technique widely used to identify organic materials. It has recently gained popularity in microplastic (MP) pollution research determine the chemical composition of unknown plastic fragments. However, it could also be evaluate degree ageing MPs collected from environment. In this context, principal aim our been qualitatively natural weathering environmental an Italian freshwater body (the Ofanto River) using ATR-FTIR technology. Furthermore, we compared particles weathered artificial under controlled light and temperature conditions unaltered pristine materials assess results. FTIR spectra were acquired Nicolet Summit (ThermoFisher Scientific) equipped with Everest ATR diamond Crystal plate DTGS KBr detector (wavenumber range 4000-500 cm-1, 32 scans per spectrum, spectral resolution 4 cm-1). The was assessed three different indexes known related changes MPs: Carbonyl Index (CI), Hydroxyl (HI), Carbon-Oxygen (COI). overall results showed that regions reflecting (hydroxyl groups, peaks 3100 3700 alkenes or carbon double bonds, 1600 1680 carbonyl 1690 1810 cm-1) appeared significantly modified calculated for polymers degraded photo thermo displayed general tendency increase time contact irradiation time. Particular enhancements CI PS fragment PE pellet, HI fragments COI observed. Otherwise, following incubation same at constant 45 °C did not further affect particles. Moreover, new unique observed particles, almost all fingerprint region (1500-500 Differences CI, HI, evidenced among morphological MP shapes. On one hand, pellets values ranging 0.05 0.26 mean value 0.17 ± 0.10. Most samples (57%) presented between 0.16 0.30. other slicer modifications lower than (0.05 0.05). This index helps degradation by UV light, increasing enhancing residence Conversely, greater (5.90 2.57) (1.04 0.48) pellets, as well lines, which maximum (11.51). attributed bond vibrations hydroxyl, carboxyl, phenol groups. contrast, frequently C_O bonds found carbohydrates, alkanes, secondary alcohols, ketones. conclusion, characteristics aged ones. interpretation main emphasizes need conduct ecotoxicological experimental studies naturally due unicity their properties, are more helpful understanding effects.

Язык: Английский

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UV and chemical aging alter the adsorption behavior of microplastics for tetracycline

Environmental Pollution, Год журнала: 2022, Номер 318, С. 120859 - 120859

Опубликована: Дек. 12, 2022

Язык: Английский

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Occurrence and distribution of microplastics in organic fertilizers in China

The Science of The Total Environment, Год журнала: 2022, Номер 844, С. 157061 - 157061

Опубликована: Июль 1, 2022

Язык: Английский

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Food and human safety: the impact of microplastics

Critical Reviews in Food Science and Nutrition, Год журнала: 2022, Номер 64(11), С. 3502 - 3521

Опубликована: Окт. 17, 2022

Plastic waste pollution is one of the biggest problems in world today. The amount plastic environment continues to increase, and human exposure microplastic (MP) has become a reality. This subject attracted attention whole world. MP problem also been noticed by scientific community. term mostly used define synthetic material with high polymer content that can have size range from 0.1 5000 µm. paper aims characterize routes MP, its sources, identify food types contaminated plastics. review addresses current state knowledge on this type particles, particular emphasis their influence health. Adverse effects depend sources exposure. most common route believed be gastrointestinal tract. Sources include fish, shellfish, water as well tea, beer, wine, energy drinks, soft milk, salt, sugar, honey, poultry meat, fruits, vegetables. Studies shown particles PET, PE, PP, PS, PVC, PA, PC are frequently found food.

Язык: Английский

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Adsorption of organic pollutants by microplastics: Overview of a dissonant literature

Journal of Hazardous Materials Advances, Год журнала: 2022, Номер 6, С. 100091 - 100091

Опубликована: Май 1, 2022

Microplastic formation in aqueous systems is among the inevitable consequences of plastic pollution, which has cascading environmental and health implications. As microplastic sizes get smaller over time, their surface areas increase, creates an implicit, dynamic, inflating new domain, called microplastisphere. This study summarizes critically reviews literature on adsorption organic compounds (OCs), are already our aquatic systems, onto surfaces. investigation a database 91 articles, 68 used analysis for 178 OCs via 770 isotherms. The four most prevalent polymer types throughout polyethylene (PE), polystyrene (PS), polypropylene (PP), polyvinyl chloride (PVC). Our revealed that octanol-water partitioning coefficient, Kow, can be good surrogate capacity some OC types; however, hydrophobicity alone may not necessarily indicate affinity. water chemistry also played notable roles process, evidenced by dramatic enhancement during per- polyfluoroalkyl (PFAS) PS saltwater conditions. However, work concluded variability within indicates strong need defined microplastics characterization testing procedures to better represent interactions with environment.

Язык: Английский

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Recent progress of microplastic toxicity on human exposure base on in vitro and in vivo studies

The Science of The Total Environment, Год журнала: 2023, Номер 903, С. 166766 - 166766

Опубликована: Сен. 2, 2023

Язык: Английский

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Long-range atmospheric transport of microplastics across the southern hemisphere

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Ноя. 30, 2023

Airborne microplastics (MPs) can undergo long range transport to remote regions. Yet there is a large knowledge gap regarding the occurrence and burden of MPs in marine boundary layer, which hampers comprehensive modelling their global atmospheric transport. In particular, efficiency with different sizes morphologies remains uncertain. Here we show hemispheric-scale analysis airborne along cruise path from mid-Northern Hemisphere Antarctica. We present inaugural measurements concentrations over Southern Ocean interior Antarctica find that fibers are transported more efficiently than fragments transect, dynamics generally similar those non-plastic particles. Morphology found be dominant factor influencing hemispheric Antarctic This study underlines importance long-range cycling environment.

Язык: Английский

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Adsorption behaviors and bioavailability of tetrabromobisphenol A in the presence of polystyrene microplastic in soil: Effect of microplastics aging

Environmental Pollution, Год журнала: 2023, Номер 334, С. 122156 - 122156

Опубликована: Июль 6, 2023

Язык: Английский

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Surface functional groups and biofilm formation on microplastics: Environmental implications

The Science of The Total Environment, Год журнала: 2023, Номер 903, С. 166585 - 166585

Опубликована: Авг. 27, 2023

Язык: Английский

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Microplastic aging processes: Environmental relevance and analytical implications

TrAC Trends in Analytical Chemistry, Год журнала: 2024, Номер 172, С. 117566 - 117566

Опубликована: Янв. 30, 2024

The analysis of microplastics (MPs) in terrestrial environments and the evaluation their environmental risk has gained great attention, owing to increasing evidence for widespread presence soils freshwater sediments globally. Once environment, MPs undergo abiotic biotic processes which alter properties integrity: this process is called "aging" implications fate these contaminants, morphology surface chemistry. Aging may also affect analytical assessment samples: samples likely contain aged MPs, while methods are generally established using pristine plastics validation. This can lead uncertainties quantification characterization. critical review summarizes current trends simulation characterization MP aging laboratory conditions, highlighting limitations knowledge gaps. It discusses challenges induced by samples, providing directions toward possible solutions.

Язык: Английский

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