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handle: 10261/36388
Um estudo experimental sobre transporte de Ni(II) através de uma membrana líquida suportada em folha plana usando a mistura de Acorga M5640 e DP-8R como transportador, foi realizado a 20 ºC. O sistema de transporte foi estudado como uma função de muitas variáveis: velocidade de agitação das fases alimentadora (400-2000 min-1) e receptora (400- 1500 min-1), concentração de ácido (2,5×10-1 a 1,0 mol L-1 de ácido sulfúrico) na fase receptadora, pH da fase de alimentação (2 a 5), diluente da membrana e carregador (2,5% v/v a 20% v/v, de cada reagente) e concentrações do metal (1,7×10-4 a 1,4×10-3 mol L-1) na membrana e na fase de alimentação, respectivamente. Nas condições experimentais atuais, o processo de transporte é controlado pela difusão do níquel dentro do filme estacionário da fase de alimentação, onde o coeficiente de transferência de massa e a espessura do filme aquoso são estimados como 1,21× 10-3 cm s-1 e 8,3×10-3 cm, respectivamente.
An experimental study of Ni(II) transport through a flan-sheet supported liquid membrane using the mixture of Acorga M5640 and DP-8R as carrier was performed at 20º C. The transport system was studied as a function of several variables: stirring speed of the feed and receiving phases, concentration of the strippant in the receiving phase, pH of the feed phase, diluent of the membrane and carrier and metal concentrations in the membrane and feed phases, respectively.
Authors thank the CSIC (Spain) for support to carry out this work and Mr. J.L. Bascones and Mr. López for their technical assistance.
Abstract en inglés y en portugués
Peer reviewed
Membrane transport, Nickel (II), DP-8R, Acorga M5640, membrane transport, nickel (II), acorga M5640
Membrane transport, Nickel (II), DP-8R, Acorga M5640, membrane transport, nickel (II), acorga M5640
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