Evaluation of Calcium Ion Transport Number through a Cation Exchange Membrane By Chronopotentiometry

Authors

  • Alex Willy Pilco Nuñez Facultad de Ingeniería Química and Textil , Universidad Nacional of Ingeniería , Lima , Perú
  • Erick Renato Cirilo Mel Facultad de Ingeniería Química and Textil , Universidad Nacional of Ingeniería , Lima , Perú
  • Freddy Ciro Tineo Cordova Facultad de Ingeniería Química and Textil , Universidad Nacional of Ingeniería , Lima , Perú
  • Juan Taumaturgo Medina Collana Facultad de Ingeniería Química, Universidad Nacional del Callao, Juan Pablo II 306 Avenue, Bellavista, Callao 07011, Perú
  • Luis Américo Carrasco Venegas Facultad de Ingeniería Química, Universidad Nacional del Callao, Juan Pablo II 306 Avenue, Bellavista, Callao 07011, Perú.
  • Jorge Alberto Montaño Pisfil Facultad de Ingeniería Química, Universidad Nacional del Callao, Juan Pablo II 306 Avenue, Bellavista, Callao 07011, Perú.

DOI:

https://doi.org/10.15379/ijmst.vi.1270

Keywords:

Cation Exchange Membrane, Chronopotentiometry, Limiting Current Density, Transport Number.

Abstract

In this research work, the transport properties of calcium ions (Ca2+) in a heterogeneous cation exchange membrane (IEM) MK-40 of Schekinoazot. Aqueous solutions of sodium chloride (NaCl) and calcium chloride (CaCl2) of 0.01 M and 0.02 M concentration, respectively, were used. The limit current density and transport numbers were evaluated by means of the chronopotentiometry technique, applying electric current pulses, obtaining electric potential differences, from which the chronopotentiograms were obtained. Then, plots of electric potential difference variation with respect to time were constructed to find the transition time. A linear fit of the transition time with the square of the inverse of the inverse of the electric current density was performed based on the modified Sand equation to determine the Ca2+ transport number. The results showed the Ca2+ transport numbers in the cation exchange membrane and in solution are 0.976 and 0.437, respectively. The limiting current density was also found for both membrane-solution systems. We conclude that chronopotentiometry is an accurate and fast technique for the determination of the ion transport number in systems consisting of ion exchange membranes and electrolyte solutions.

Downloads

Download data is not yet available.

Downloads

Published

2023-07-04

How to Cite

[1]
A. W. P. . Nuñez, E. R. C. . Mel, F. C. T. . Cordova, J. T. M. . Collana, L. A. C. . Venegas, and J. A. M. . Pisfil, “Evaluation of Calcium Ion Transport Number through a Cation Exchange Membrane By Chronopotentiometry”, ijmst, vol. 10, no. 3, pp. 129-135, Jul. 2023.

Most read articles by the same author(s)