Stimulated Raman microspectroscopy as a new method to classify microfibers from environmental samples

Laptenok, Sergey P.; Martin, Cecilia; Genchi, Luca; Duarte, Carlos M.; Liberale, Carlo

doi:10.1016/j.envpol.2020.115640

Cited by 44 publications

(18 citation statements)

References 55 publications

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“…marina site may increase the occurrence of other shapes of microplastics and lower the relative percentage of the fiber. The fiber and sharp fragment of microplastics may influence the ingestion in biota due to gut blockage and internal abrasion when ingested by organisms. , Nevertheless, there might be an overestimation of fiber abundance since a large fraction of the microfibers from environmental samples are of natural origin. , …”

Section: Discussionmentioning

confidence: 99%

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New Insights into the Microplastic Enrichment in the Blue Carbon Ecosystem: Evidence from Seagrass Meadows and Mangrove Forests in Coastal South China Sea

Huang

Xiao

Effiong

et al. 2021

Environ. Sci. Technol.

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Microplastics were recently found to aggregate in the blue carbon ecosystems (BCEs), which are known for their ability to store carbon by slowing down the water flow. However, evidence is largely lacking on how the accumulation of microplastics is related to carbon sequestration in BCEs and if this trap effect is driven by its biological characteristics. In this study, the trap effect of microplastics by BCEs was evaluated for various seagrasses (Zostera japonica, Halophila ovalis, and Halophila beccarii) and mangroves (Aegiceras corniculatum and Avicennia marina). Significant accumulation was found in the seagrass meadow dominated by H. beccarii and the mangrove forest dominated by A. marina, with microplastics enriched by 1.3 to 17.6 times compared to their corresponding unvegetated sites. The abundance of microplastics varied greatly from 17.68 ± 8.10 to 611.75 ± 81.52 particles per kg of dry sediment, with the highest abundance in A. marina mangrove sediments. A strong positive correlation was found between the abundance of microplastics and the particulate organic carbon content at all study sites (Pearson, R = 0.86, p < 0.01). Higher diversity of microplastic colors and size was found in the H. beccarii meadow, and higher diversity of shapes was found in the A. marina forest. Our results added new insights to the understanding of the mechanism of microplastic trapping by BCEs and coupled the behavior of microplastics with the organic carbon in the sediment.

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Section: Discussionmentioning

confidence: 99%

“…55, 56 Nevertheless, there might be an overestimation of fiber abundance since a large fraction of the microfibers from environmental samples are of natural origin. 57,58 4.3.2. Color.…”

Section: Trap Effect By the Bce (Seagrass Meadow Andmentioning

confidence: 99%

New Insights into the Microplastic Enrichment in the Blue Carbon Ecosystem: Evidence from Seagrass Meadows and Mangrove Forests in Coastal South China Sea

Huang

Xiao

Effiong

et al. 2021

Environ. Sci. Technol.

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“…Therefore, proper identification of plastic particles and some of additives (e.g., pigments, oxides) as well as other (in)organic and (micro)biological compounds can be performed ,,,, using homemade and commercial spectral databases. Besides the analysis of MP particles, Raman spectroscopy is applicable for the differentiation of synthetic and natural fibers. ,, …”

Section: Chemical Analysis Of Microplasticsmentioning

confidence: 99%

Chemical Analysis of Microplastics and Nanoplastics: Challenges, Advanced Methods, and Perspectives

2021

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Microplastics and nanoplastics have become emerging particulate anthropogenic pollutants and rapidly turned into a field of growing scientific and public interest. These tiny plastic particles are found in the environment all around the globe as well as in drinking water and food, raising concerns about their impacts on the environment and human health. To adequately address these issues, reliable information on the ambient concentrations of microplastics and nanoplastics is needed. However, micro- and nanoplastic particles are extremely complex and diverse in terms of their size, shape, density, polymer type, surface properties, etc. While the particle concentrations in different media can vary by up to 10 orders of magnitude, analysis of such complex samples may resemble searching for a needle in a haystack. This highlights the critical importance of appropriate methods for the chemical identification, quantification, and characterization of microplastics and nanoplastics. The present article reviews advanced methods for the representative mass-based and particle-based analysis of microplastics, with a focus on the sensitivity and lower-size limit for detection. The advantages and limitations of the methods, and their complementarity for the comprehensive characterization of microplastics are discussed. A special attention is paid to the approaches for reliable analysis of nanoplastics. Finally, an outlook for establishing harmonized and standardized methods to analyze these challenging contaminants is presented, and perspectives within and beyond this research field are discussed.

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“…We separated data on nonfibrous plastic from fibers because samples are more likely contaminated by fibers, rather than by nonfibrous plastic (Gago et al 2018), and because the nature (synthetic vs. natural) of fibers is rarely identified (Laptenok et al 2020). Moreover, the mass of an individual fiber is negligeable compared to the mass of a nonfibrous piece of plastic of the same length, due to their small diameters.…”

Section: Estimating the Loads Of Plastics In Sedimentsmentioning

confidence: 99%

Ocean sediments as the global sink for marine micro‐ and mesoplastics

Martin

Young

Valluzzi

et al. 2022

Limnol Oceanogr Letters

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Despite the high attention given to the amount of plastic debris floating in the open ocean, these only accounts for a small fraction of the plastic annually entering the marine environment. It is widely believed that most marine plastic sinks in the water column and ends up buried in sediments where it remains unless disturbed. While many case studies have assessed the stocks of plastic in marine sediments, from intertidal habitats to the deep ocean, none has attempted to synthetize the published data and calculate a global estimate. Here, we compiled a dataset of published stocks of plastic in marine sediments and used it to calculate the global stock to ultimately demonstrate that marine sediments are a major sink of plastic in the global ocean.

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Stimulated Raman microspectroscopy as a new method to classify microfibers from environmental samples

Cited by 44 publications

References 55 publications

New Insights into the Microplastic Enrichment in the Blue Carbon Ecosystem: Evidence from Seagrass Meadows and Mangrove Forests in Coastal South China Sea

New Insights into the Microplastic Enrichment in the Blue Carbon Ecosystem: Evidence from Seagrass Meadows and Mangrove Forests in Coastal South China Sea

Chemical Analysis of Microplastics and Nanoplastics: Challenges, Advanced Methods, and Perspectives

Ocean sediments as the global sink for marine micro‐ and mesoplastics

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