Combination of Micro-Raman and Infrared Spectroscopy to Identify Intriguing Case of Aged Microplastics of Estuarine Sediments

Q3 Materials Science

Macromolecular Symposia Pub Date : 2024-12-16 DOI:10.1002/masy.202400061

Jacinete Lima dos Santos, Allan Bereczki, Diego Roberto da Cunha Pascoal, Giovana Teixeira Gimiliani, Marycel Elena Barboza Cotrim, Anderson Zanardi de Freitas, Niklaus Ursus Wetter, Duclerc Fernandes Parra

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引用次数: 0

Abstract

The Atlantic Forest is one of the richest regions in biodiversity in the world. Originally the biome covered around 15% of the Brazilian territory. Currently, there are approximately 12.4% of forest remnants preserved in the country. Regarding mangrove areas in the state of São Paulo, there are around 223 km² according to the Brazilian Mangrove Atlas, with around 120.5 km² located in Baixada Santista. Analysis of sediments found in the estuarine mangroves of Santos shows a high concentration of microplastics (MPs), generated by industrial processes and human activity, that constitutes today one of the main environmental problems. The MPs presented in the sediment samples are quantified using a methodology that involves drying, sieving, quantification, and identification of these MPs through FTIR and micro-Raman spectroscopy. The two techniques complement each other to identify MP filaments and fragments through common polymer spectra. Furthermore, the micro-Raman technique also identified additives flexo blue (blue ink) and neolan green 8G (dye) in MPs. All identified polymers (< 5 mm) have wide applications and demands in various sectors, including packaging, construction, automotive, electronics, and textiles.

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结合微拉曼和红外光谱识别河口沉积物中老化微塑料的有趣案例

大西洋森林是世界上生物多样性最丰富的地区之一。最初，这个生物群落覆盖了巴西15%的领土。目前，大约有12.4%的森林遗迹保存在该国。根据巴西红树林地图集，在圣保罗州的红树林面积约为223平方公里，其中约120.5平方公里位于Baixada Santista。对桑托斯河口红树林沉积物的分析表明，工业过程和人类活动产生的高浓度微塑料（MPs）构成了当今主要的环境问题之一。沉积物样品中的MPs采用一种方法进行定量，该方法包括干燥、筛分、定量和通过FTIR和微拉曼光谱对这些MPs进行鉴定。这两种技术相互补充，通过共同的聚合物光谱来识别MP细丝和片段。此外，微拉曼技术还鉴定了MPs中的添加剂柔印蓝（蓝墨水）和尼兰绿8G（染料）。所有已鉴定的聚合物(<；5毫米)在各个领域有广泛的应用和需求，包括包装，建筑，汽车，电子和纺织品。

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来源期刊

Macromolecular Symposia Materials Science-Polymers and Plastics

CiteScore

1.50

自引率

0.00%

发文量

226

期刊介绍： Macromolecular Symposia presents state-of-the-art research articles in the field of macromolecular chemistry and physics. All submitted contributions are peer-reviewed to ensure a high quality of published manuscripts. Accepted articles will be typeset and published as a hardcover edition together with online publication at Wiley InterScience, thereby guaranteeing an immediate international dissemination.