Separation Study of Silver(I) Ion through a Bulk Liquid Membrane Containing Meloxicam
نویسندگان
چکیده
Estudou-se o transporte ativo de íons Ag através de uma membrana líquida de clorofórmio contendo meloxicam. Avaliaram-se diferentes condições experimentais para aumentar a seletividade, sensibilidade e a velocidade de transporte, como por exemplo, efeito da concentração de meloxicam na membrana de clorofórmio, pH das fases doadoras e receptoras, tipos e concentrações de agentes removedores. Na presença de tiocianato, um agente removedor eficiente na fase receptora, a quantidade de íons Ag transportados através da membrana líquida foi de 97,8 ± 1,2% em 120 min. A seletividade e eficiência do transporte dos íons Ag a partir de soluções aquosas contendo outros cátions, como Co, Cr, Ni, Cd, Mn, Cu, Pb, Ca, Mg e Zn foram investigadas. Com exceção dos íons Cr e Pb, os cátions não interferiram no transporte dos íons Ag, mesmo em razões molares M/Ag da ordem de 500. O efeito interferente desses dois cátions foi minimizado na presença de EDTA em pH 6.
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