Transportation and kinetic analysis of Mo(VI) ions through a MDLM system containing TNOA as carrier

Abstract

In this report, Mo(VI) ions are transported from an aqueous donor phase into an aqueous acceptor phase by a newly designed method called as multi dropped liquid membrane (MDLM) system prepared by dissolving TNOA as carrier in kerosene. During the extraction of Mo(VI) ions by the liquid membrane system; 100ppm Mo(VI) solutions as donor phase, buffer solution(pH:9.5) and Na<inf>2</inf>CO<inf>3</inf> in different concentrations as acceptor phase and TNOA diluted by kerosen as organic phase are used. In our experimental work, the effect of temperature by using buffer solution and Na<inf>2</inf>CO<inf>3</inf> in the acceptor phase and effect of concentration of acceptor phase on the extraction of Mo(VI) ions were investigated. Appropriate conditions for Mo(VI) transportation were as follows: pH of donor phase is 2.00, concentration of TNOA is 0.005M, 1.00M Na<inf>2</inf>CO<inf>3</inf> as acceptor phase, and flux rate is 50mL/min. Besides, Mo(VI) ion transportation is consecutive first order irreversible reaction and the transportation of Mo(VI) ions is diffusion controlled process. The kinetic parameters (k<inf>1</inf>, k<inf>2</inf>, Rmmax, t<inf>max</inf>, Jdmax, Jamax) were calculated for the interface reactions assuming two consecutive, irreversible first-order reactions. © 2015 Elsevier B.V.