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Página principal > Artículos > Artículos publicados > Can a Sediment Core Reveal the Plastic Age? Microplastic Preservation in a Coastal Sedimentary Record |
Fecha: | 2022 |
Resumen: | The seafloor is the major sink for microplastic (MP) pollutants. However, there is a lack of robust data on the historical evolution of MP pollution in the sediment compartment, particularly the sequestration and burial rate of small MPs. By combining a palaeoceanographic approach and state-of-the-art analytical methods for MP identification down to 11 μm in size, we present the first high-resolution reconstruction of MP pollution from an undisturbed sediment core collected in the NW Mediterranean Sea. Furthermore, we investigate the fate of MPs once buried in the sediments by evaluating the changes in the size distribution of the MPs and the weathering status of the polyolefins, polyethylene, and polypropylene. Our results indicate that the MP mass sequestered in the sediment compartment mimics the global plastic production from 1965 to 2016. We observed an increase in the weathering status of the polyolefins as the size decreased. However, the variability in the size and weathering status of the MPs throughout the sedimentary record indicated that these pollutants, once incorporated into sediments, remain preserved with no further degradation under conditions lacking remobilization. Microplastics sequestered into undisturbed marine sediments remain preserved with no signal of further degradation over time. |
Ayudas: | Ministerio de Ciencia, Innovación y Universidades CEX2019-000940-M Agència de Gestió d'Ajuts Universitaris i de Recerca 2018/FI_B 00918 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1588 |
Nota: | Unidad de excelencia María de Maeztu CEX2019-000940-M |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió publicada |
Materia: | Microplastics ; Sediments ; Weathering ; Carbonyl index ; Accumulation |
Publicado en: | Environmental Science & Technology, Vol. 56, Issue 23 (December 2022) , p. 16780-16788, ISSN 1520-5851 |
9 p, 4.9 MB |