Abstract
In the present paper we studied the competitive transport of p-nitrophenol (pNP) and 2,4-dinitrophenol (2,4-dNP) from aqueous
media using the technique of liquid membranes. This technique is very efficient, economic and selective when compared to other
removal techniques of phenolic derivatives. The paper presents the influence of the sodium carbonate concentration from the
stripping phase, the influence of the concentration ratio [2,4-dNP]/[pNP] upon the selectivity of the transport process and some
kinetic aspects of the transport of 2,4-dNP in the presence of pNP through bulk liquid membranes.