Evaluation of NaX and NaY packed beds for chromium uptake from multicomponent solution
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Data
2014-06
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Resumo
In this paper the removal of chromium from Cr/Ca/Mg/K and Cr/Ca/Mg/K/Na solutions
was investigated in NaX and NaY packed beds. The breakthrough curves presented some overshooting
phenomena where chromium ions displaced the previous exchanged cations. Length of unused bed, overall
mass transfer coefficient, operational ratio and dimensionless variance were obtained. According to such
mass transfer parameters it was concluded that the chromium uptake is influenced by the competition and
interaction of the entering ions. Such influences were verified through some differences in the dynamic
selectivity obtained for each system. NaY seemed to have a higher affinity towards Cr3+ and its sites were
more efficiently used in the ion exchange process.
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Palavras-chave
Zeolite, Breakthrough, Multicomponent, Ion exchange, Zeólita, Curvas de ruptura, Multicomponente, Troca iônica
Citação
BARROS, Maria Angélica Simões Dornellas de et al. Evaluation of NaX and NaY packed beds for chromium uptake from multicomponent solution. Acta Scientiarum. Technology, Maringá, v. 36, n. 2, p. 279-286, Apr./June, 2014.