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.
Talaromyces amestolkiae uses organic phosphate sources for the treatment of uranium‑contaminated water
2022 - COELHO, EDNEI; REIS, TATIANA A.; COTRIM, MARYCEL; MULLAN, THOMAS K.; RENSHAW, JOANNA; RIZZUTTO, MARCIA; CORREA, BENEDITO
Fungi have received particular attention in regards to alternatives for bioremediation of heavy metal contaminated locales. Enzymes produced by filamentous fungi, such as phosphatases, can precipitate heavy metal ions in contaminated environments, forming metal phosphates (insoluble). Thus, this research aimed to analyze fungi for uranium biomineralization capacity. For this, Gongronella butleri, Penicillium piscarium, Rhodotorula sinensis and Talaromyces amestolkiae were evaluated. Phytate and glycerol 2-phosphate were used as the phosphate sources in the culture media at pH 3.5 and 5.5, with and without uranium ions. After 4 weeks of fungal growth, evaluated fungi were able to produce high concentrations of phosphates in the media. T. amestolkiae was the best phosphate producer, using phytate as an organic source. During fungal growth, there was no change in pH level of the culture medium. After 3 weeks of T. amestolkiae growth in medium supplemented with phytate, there was a reduction between 20 and 30% of uranium concentrations, with high precipitation of uranium and phosphate on the fungal biomass. The fungi analyzed in this research can use the phytic acid present in the medium and produce high concentrations of phosphate; which, in the environment, can assist in the heavy metal biomineralization processes, even in acidic environments. Such metabolic capabilities of fungi can be useful in decontaminating uranium-contaminated environments.
Bioremediation of water contaminated with uranium using Penicillium piscarium
2020 - COELHO, EDNEI; REIS, TATIANA A.; COTRIM, MARYCEL; RIZZUTTO, MARCIA; CORREA, BENEDITO
Penicillium piscarium can be indicated as promising in the treatment of sites contaminated with uranium. Thus, this research aimed to analyze the P. piscarium dead biomass in uranium biosorption. This fungus was previously isolated from a highly contaminated uranium mine located in Brazil. Biosorption tests were carried out at pH 3.5 and 5.5 in solutions contaminated with concentrations of 1 to 100 mg/L of uranium nitrate. Our results showed that the dead biomass of P. piscarium was able to remove between 93.2 and 97.5% uranium from solutions at pH 3.5, at the end of the experiment, the pH of the solution increased to values above 5.6. Regarding the experiments carried out in solutions with pH 5.5, the dead biomass of the fungus was also able to remove between 38 and 92% uranium from the solution, at the end of the experiment, the pH of the solution increased to levels above 6.5. The analysis of electron microscopy, Energy-dispersive spectroscopy, and X-ray fluorescence demonstrated the high concentration of uranium precipitated on the surface of the fungal biomass. These results were impressive and demonstrate that the dead biomass of P. piscarium can be an important alternative to conventional processes for treating water contaminated with heavy metals, and we hope that these ecofriendly, inexpensive, and effective technologies be encouraged for the safe discharge of water from industrial activities.
Improvements in metal exposure assays
2019 - BORDON, ISABELLA C.; CAMPOS, BRUNO G. de; GUSSO‑CHOUERI, PALOMA K.; MIYAI, CAIO A.; ARAUJO, GIULIANA S. de; EMERENCIANO, ANDREWS K.; SILVA, JOSE R.M.C. da; COTRIM, MARYCEL E.B.; FAVARO, DEBORAH I.T.; ABESSA, DENIS M. de S.
This technical note aims to report, in detail, the development, suitability and analytical validation of an artificial food to assess metal bioaccumulation in the blue crab Callinectes danae after metal exposure assays. For this purpose, lead (Pb) was chosen as the metal of interest. First, a non-contaminated artificial food was prepared by mixing commercial shrimps and agarose. The food was then offered on alternate days to two groups of crabs for 7 and 14 days, respectively. After confirming that this food was well-accepted by crabs, analytical procedures were performed to confirm that Pb added to the mixture would remain in the artificial food. For this purpose, two foods containing Pb at concentrations of 0.5 and 2.0 μg g− 1 were prepared by adding aliquots of an ultrapure Pb standard solution to the mixture. Samples of each food were subjected to an acid extraction and Pb concentrations were determined by a GF-AAS. Pb recoveries in both contaminated foods were > 90%. Subsequently, another experiment was performed, and two groups of crabs were fed with contaminated artificial foods (0.5 and 2.0 μg g− 1 of Pb) during 7 and 14 days, respectively. The observed acceptance of these foods by crabs at both Pb concentrations was of 100%.