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Aegerter, M.A.; Santos, D.I. dos; Ventura, P.C.S.
Proceedings of the 6. Brazilian Congress on Engineering and Materials Science1984
Proceedings of the 6. Brazilian Congress on Engineering and Materials Science1984
AbstractAbstract
[en] Aqueous solutions simulating radioactive nuclear wastes (like Savanah River Laboratory) were incorporated in porous glass matrix with high silica content prepared by decomposition of borosilicate glass like Na2O - B2O3 - SiO2. After sintering, the samples were submitted, during 28 days, to standard leaching tests MCC1, MCC5 (Soxhlet) and stagnating. The total weight loss, ph, as well as the integral and differential leaching rates and the accumulated concentrations in the leach of Si, Na, B, Ca, Mn, Al, Fe and Ni. The results are compared with the results from reference borosilicate glass, made by fusion, ceramic, synroc, concrets, etc... (E.G.)
[pt]
Solucoes aquosas simuladas de rejeitos nucleares radioativos (tipo Savanah River Laboratory) foram incorporadas em matrizes de vidros porosos de alto teor de silica preparadas por decomposicao espinodal de vidros borosilicatos do tipo Na2O-B2O3-SiO2. Apos sinterizacao as amostras fora sujeitas durante 28 dias, a testes de lixiviacao padronizados MCC1, MCC5 (Soxhlet) e estagnante. Determinamos a perda de peso total, o pH, assim como as taxas de lixiviacao integral, diferencial e as concentracoes acumuladas no lixiviante de Si, Na, B, Ca, Mn, Al, Fe e Ni. Os resultados sao comparados com os obtidos com vidros borosilicatos de referencia, fabricados por fusao, ceramicas, synroc, concretos, etc... (Autor)Original Title
Vidros porosos de alto teor de silica para armazenamento de rejeitos nucleares : preparacao, caracterizacao e lixiviacao
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Pontificia Univ. Catolica do Rio de Janeiro (Brazil); 399 p; 1984; p. 370-376; 6. Brazilian Congress on Engineering and Materials Science; Rio de Janeiro, RJ (Brazil); 9-12 Dec 1984
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Miscellaneous
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Conference
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