Transport kinetics of Hg2+ through bulk liquid membrane using calix[4]arene ketone derivative as carrier

Abstract

In this article, calix[4]arene ketone derivative was used as a carrier to transport Hg 2+ ions from an aqueous solution into an aqueous receiving solution. The kinetic parameters (k 1 , k 2 , R m max , t max , J d max , J a max ) were investigated with influence of temperature, the solvent, and stirring rate and analyzed in the formation of two consecutive, irreversible first order reactions. The membrane entrance rate, k 1 , and the membrane exit rate, k 2 , constants were increased with temperature and stirring rate and found to be dependent on the solvent type in the order CH 2 Cl 2 > CHCl 3 > CCl 4 . The activation energy was obtained as 5.28 kcal/mol from the slope of the Arrhenius plot for the case of maximum membrane exit flux, J a max . This value indicates that the process is controlled by species diffusion.