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- Title
The influence of activation of heterogeneous ion-exchange membranes on their electrochemical properties.
- Authors
Brožová, L.; Křivčík, J.; Neděla, D.; Kysela, V.; Žitka, J.
- Abstract
The aim of this work was to find optimal conditions of activation of heterogeneous ion-exchange membranes. Commercial both cation-exchange and anion-exchange membranes were used in this study. The activation procedure consists in alternating immersion of a heterogeneous membrane into aqueous solutions of 1 M HCl and 1 M NaOH. The activation procedure of cation-exchange membranes consists in a multiple conversion of the Na+membrane form to the H+form and back and that of anion-exchange membranes in a multiple conversion of the Cl−membrane form to the OH−form and back. An efficient activation of anion exchange membranes strongly depends on the total time of treatment and on the number of exchange steps and requires at least a 5-d treatment and two exchanges of ions or 4.5 h treatment and four exchanges of ions. An efficient activation of cation exchange membranes is a rather fast process requiring about 3.5 h and three exchanges of ions.
- Subjects
ELECTROCHEMICALS industry; ION exchange (Chemistry); ACTIVATED carbon; SALINE water conversion; WATER purification
- Publication
Desalination & Water Treatment, 2015, Vol 56, Issue 12, p3228
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.980975