CHRISTINA APARECIDA LEAO GUEDES DE OLIVEIRA FORBICINI

CHRISTINA APARECIDA LEAO GUEDES DE OLIVEIRA FORBICINI

Página do item completo

Resultados de Busca

Agora exibindo 1 - 10 de 21

Study of new routes for purification of fission 99Mo
2021 - DAMASCENO, M.O.; MARQUES, F.A. da S.; DIAS, R.R.; SANTOS, J.L.; FORBICINI, C.A.L.G.O.
99mTc is the most used medical radioisotope in the world, especially for diagnosis procedures. It is originated in the radioactive decay of 99Mo, which in turn is one of the fission products of the uranium irradiation that occurs in nuclear reactors. The chemical processing of 99Mo might be lined up in several steps according to the characteristics of the targets or the local requirements in order to separate it from other fission products. In this work, two routes of 99Mo purification, MR1 and MR2, were purposed as an alternative method to be set up in the Brazilian Multipurpose Reactor project. The MR1 route consisted by three consecutives chromatographic columns packed with strong anionic resin, Chelating resin, and aluminum oxide, respectively. The MR2 route was arranged in two chromatographic columns and a sublimation oven. The final yield for the MR1 was 84.4% and the overall time process was about 7 hours, performing the highest final 99Mo recovery efficiency, high decontamination degree and a shorter process time compared to the MR2.
Evaluation of microwave technology in the additional purification of Mo-99, produced from LEU targets
2019 - LANDINI, LILIANE; ARAUJO, SUMAIR G.; FORBICINI, CHRISTINA A.L.G.O.
In the present work, the feasibility of the microwave technology was studied as an additional purification step (sublimation) in the production of Mo-99, via the alkaline dissolution of LEU (low enrichment uranium) targets of UAlx/Al, in the RMB (Brazilian Multipurpose Reactor) project, which is usually accomplished by induction furnace. The intention was to decrease the time spent in this purification step, for later comparison between the methods. Thus, non-radioactive samples of sodium molybdate (solution) and appropriate catalysts/materials (which could withstand up to 1300°C) were prepared and employed. All experiments were performed in a microwave oven scale (1000W/2.45GHz), under atmospheric pressure. Considering that the experiments with induction furnace lasted from 1.5h to 2h for the sublimation of oxide and molybdenum separation, the preliminary results, obtained in this study, demonstrated the time savings and the possibility of reaching temperatures up to 1200°C in less than 30 minutes. Therefore, the use of this technique is considered promising for this application, although other studies and specific devices are required.
Study of new routes for purification of fission (99)Mo
2019 - 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.
Status report on thechnical progress for LEU-based sup(99)Mo production at IPEN-CNEN/SP, Brazil - Modified Cintichem process
2015 - OSSO JUNIOR, J.A.; DIAS, C.R.B.R.; TEODORO, R.; CATANOSO, M.F.; BRAMBILLA, T.P.; POZZO, L.; SQUAIR, P.; FUKUMORI, N.; CARVALHO, F.M.S.; ZINI, J.; CAMILO, R.L.; FORBICINI, C.; YAMAMURA, M.; ARAUJO, I.C.; FREITAS, A.A.; CARVALHO, E.U.; DURAZZO, M.; SILVA, A.M.; PIRES, M.A.; MARUMO, J.T.; DELLAMANO, J.C.; MENGATTI, J.; PERROTTA, J.A.
Estudos de dissolucao alcalina de alvos de UAlsub(2)-Al visando a producao de Mo-99
2010 - CAMILO, R.L.; ARAUJO, I.C. de; YAMAURA, M.; FORBICINI, C.A.L.G. de O.; MINDRISZ, A.C.
Comportamento de adsorcao nas aluminas acida e neutra para o processo de purificacao de sup(99)Mo de fissao
2010 - YAMAURA, M.; FREITAS, A.A.; FORBICINI, C.A.L.G. de O.; CAMILO, R.L.
Studies on the separation of 99Mo from nitric acid medium by alumina
2010 - YAMAURA, M.; FREITAS, A.A.; YAMAMURA, A.P.G.; TANAKA, R.M.N.; FORBICINI, C.A.L.G. de O.; CAMILO, R.L.; ARAUJO, I.C.
Adsorption behavior of sup(99)Mo using AGI-X8 anionic resin
2013 - SANTOS, JACINETE L. dos; YAMAURA, MITIKO; DAMASCENO, MARCOS O.; FORBICINI, CHRISTINA A.L.G.O.
Influence of initial temperature and heating method in the temperature profile during the alkaline dissolution of Al for the production of Mo-99
2013 - CAMILO, RUTH L.; ARAUJO, IZILDA C.; MINDRISZ, ANA C.; FORBICINI, CHRISTINA A.L.G. de O.
Temperature profile during the alkaline dissolution of Al for the production of Mo-99
2013 - ARAUJO, IZILDA C.; CAMILO, RUTH L.; MINDRISZ, ANA C.; FORBICINI, CHRISTINA A.L.G. de O.