JACINETE LIMA DOS SANTOS
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Artigo IPEN-doc 31135 Combination of micro-Raman and infrared spectroscopy to identify intriguing case of aged microplastics of estuarine sediments2024 - SANTOS, JACINETE L. dos; BERECZKI, ALLAN; PASCOAL, DIEGO R. da C.; GIMILIANI, GIOVANA T.; COTRIM, MARYCEL E.B.; FREITAS, ANDERSON Z. de; WETTER, NIKLAUS U.; PARRA, DUCLERC F.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.Artigo IPEN-doc 30267 Aspects of higly microplastic contamination in the Atlantic Forest estuary2023 - PARRA, DUCLERC F.; GIMILIANI, GIOVANA; SANTOS, JACINETE L. dos; COTRIM, MARYCEL E.B.The Atlantic Forest is one of the richest regions in terms of biodiversity in the world. Originally the biome covered about 15% of the national territory. Currently, only about 12.4% (SOS MATA ATLÂNTICA, 2021) of well-preserved forest remnants remain in the country [1]. Regarding mangrove areas, in the state of São Paulo there are about 223 km², according to the Atlas of mangroves in Brazil, with about 120.5 km² of this total in Baixada Santista. Analyzes of sediments collected at Santos estuarine mangroves, in various points show a high concentration of microplastics generated from industrial processes or even anthropogenic activity. These solid particles based on (< 5 mm) are today one of the main environmental problems. The microplastics present in the sediment samples were quantified after drying and sieving amount limited of sediment. FTIR and micro-Raman spectroscopy identified filaments and fragments of microplastics (MPs) as commom polymer spectra. Also additives and herbicides were present in some MPs. All polymeric types identified (<5mm) have wide applications and demands by packaging, civil construction, automotive, electrical and electronics, and textile sectors.