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 30643 Metodologia de separação e identificação de microplásticos em águas dos canais de Santos e análise por ativação neutrônica para identificação de contaminantes2024 - RAVANELI, V.P.; SANTOS, J.L. dos; SILVA, P.S.C. da; PARRA, D.F.Artigo IPEN-doc 26232 Study of new routes for purification of fission (99)Mo2019 - DAMASCENO, MARCOS O.; MARQUES, FERNANDA A. da S.; DIAS, RICARDO R.; SANTOS, JACINETE L. dos; FORBICINI, CHRISTINA A.L.G. de O.99mTc is the most widely applied medical radioisotope in the world, especially for cancer diagnosis procedures. It is provided by 99Mo radioactive decay, which is one of the fission products of irradiated uranium by nuclear reactors. At main production centers, 99Mo chemical processing line up different steps to separate it from other fission products, depending on features of targets or local requirements. In this work, two new routes (MR1 and MR2) for 99Mo purification are presented, called MR1 and MR2, can be set up in the Brazilian Multipurpose Reactor project (RMB). In the first studied route, 99Mo purification initiated by eluting the solution through a Dowex 1x8 resin chromatography column, followed by a second step using a Chelex resin column and finally, the process was finished using an alumina column. For a second route, the first step is also performed with a Dowex 1x8 column, followed by a second separation step using alumina column, and lastly, a sublimation process was carried out in a tubular oven under programmed conditions. The final yield for the MR1 route has reached 84.4% and the overall time process about 7 hours, by contrast, MR2 route came to 75.3% in 9 hours.Resumo IPEN-doc 16281 Transport of Eu(III) ions through a supported liquid membrane containing thenoyltrifluoroacetone2008 - SANTOS, J.L. dos; FELINTO, M.C.F.C.; DINIZ, Y.L.Artigo IPEN-doc 19411 Adsorption behavior of sup(99)Mo using AGI-X8 anionic resin2013 - SANTOS, JACINETE L. dos; YAMAURA, MITIKO; DAMASCENO, MARCOS O.; FORBICINI, CHRISTINA A.L.G.O.Artigo IPEN-doc 19277 Studies on molybdenum elution study in dowex 1x8 resin applied on purification process of fission sup(99)Mo2013 - DAMASCENO, M.O.; YAMAURA, M.; SANTOS, J.L. dos; FORBICINI, C.A.L.G. de O.Artigo IPEN-doc 19251 Study on optimum conditions for Mo-99 adsorption by magnetite nanoparticles2013 - HOLLAND, HELBER; YAMAURA, MITIKO; DAMASCENO, MARCOS O.; SANTOS, JACINETE L.Artigo IPEN-doc 19246 Biomass as biosorbent for molybdenum ions2013 - YAMAURA, MITIKO; SANTOS, JACINETE L. dos; DAMASCENO, MARCOS O.; EGUTE, NAYARA dos S.; MORAES, ADENIANE A.N.; SANTOS, BRUNO Z.Artigo IPEN-doc 19237 Proposal of a separation process for the production of Mo-992013 - YAMAURA, MITIKO; DAMASCENO, MARCOS O.; SANTOS, JACINETE L. dos; EGUTE, NAYARA dos S.Artigo IPEN-doc 15105