MARYCEL ELENA BARBOZA COTRIM

MARYCEL ELENA BARBOZA COTRIM

(Fonte: Lattes)

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Bachelor's at Química from Faculdades Osvaldo Cruz (1985), master's at Tecnologia Nuclear from Instituto de Pesquisas Energeticas E Nucleares (1991) and doctorate at Tecnologia Nuclear from Instituto de Pesquisas Energeticas E Nucleares (2006). Has experience in Chemistry, focusing on Separation, acting on the following subjects: avaliação ambiental, metais, química ambiental, qualidade da água and química analítica. (Text obtained from the Currículo Lattes on November 17th 2021)

Mestrado em Tecnologia Nuclear pelo Instituto de Pesquisas Energéticas E Nucleares (1991) e Doutorado em Tecnologia Nuclear pelo Instituto de Pesquisas Energéticas E Nucleares (2006). Atualmente é pesquisador da Comissão Nacional de Energia Nuclear. Experiência em química analítica, atuando principalmente nos seguintes temas: avaliação ambiental, metais, química ambiental, qualidade da água e química analítica, caracterização de compostos de urânio e química analítica instrumental. (Texto extraído do Currículo Lattes em 17 nov. 2021)

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Contamination characteristics in runof fractions from a nuclear facility in São Paulo, Brazil
2023 - FAUSTINO, MAINARA G.; MONTEIRO, LUCILENA R.; LIMA, SAMIA R.M.; SILVA, TATIANE B. de S.C. da; PIRANI, DEBORA A.; PEDREIRA FILHO, WALTER dos R.; GONZAGA, ROBERTA G.; COTRIM, MARYCEL E.B.; PIRES, MARIA A.F.
The stormwater runoff may act as a nonpoint pollutant source and contributes to aquatic ecosystem quality decay in urban environments. The aim of this work was to evaluate the runoff characteristics on the transport of total solids and total metals, as well as pH and conductivity responses during the rainfall evolution. During 2017 and 2018, 12 rain events were monitored in 4 sampling stations at a car parking lot located at Nuclear and Energy Research Institute (IPEN/CNEN) in São Paulo/Brazil. A 4-chamber integrated collector allowed the sequential/temporal runoff evolution assessment. The runoff composition, in decreasing order of quantities, was Ca > K > Mg > Si > Al > Fe > Na > Zn > Mn > Sr > Ti > Mo > V > Cu > B > Pb > Ni > Ce > Sb > Cr > La > U > Th > Cd. The amount of total solids, Al, and Fe exceeded the Brazilian water quality standards. Principal component analysis (PCA) identified the elemental clusters linked to the facility activity, soil, and traffic/atmospheric-related deposition. The results show that the runoff characteristics could be differentiated by pollutant source. Factors such as seasonal variation, rain event intensity, air mass from oceanic or continental origin, spatial distribution inside the monitoring area, and the intensity of the first flush must be considered in order to disentangle the elemental clusters and pollution source contributions. In winter, continental air masses were associated with higher concentrations of heavy metals in the surface runoff. Spatial changes with no seasonal variation were observed for U, Th, La, and Ce.
An overview of spectrometric techniques and sample preparation for the detrmination of impurities in uranium nuclear fuel grade
2013 - SOUZA, ALEXANDRE L. de; COTRIM, MARYCEL E.B.; PIRES, MARIA A.F.
This review is focused on the impurities determination in uranium nuclear fuel grade matrix with the use of spectrometric methods. It is known that uranium is the major element and material for the sustainable use in the nuclear energy. The optimized use of this technology involves the improvement of several processes to power generation. With regard of fuel reliability, the chemical characterization combined with environmental protection is particularly important in the uranium production cycle or in the nuclear fuel cycle, subject to an increasing number of international conventions and protocols. The performance of nuclear fuel in reactors depends mainly on the chemical composition of its impurities and its estimation is important from the point of view of neutron economy. Among the instrumental analytical techniques commonly used for the determination of elemental impurities in uranium compounds spectrometric techniques are commonly used, such as; FAAS, GFAAS, ICP OES and ICP-MS. Usually, it is necessary in a previous uranium separation and preconcentration of the impurities for elemental determination. Thus, the aim of this review is to give an overview of the main process using sample preparation, separation and preconcentration of analytes for the instrumental determination.