The influence of activation of heterogeneous ion-exchange membranes on their electrochemical properties

0450863 - ÚMCH 2016 RIV US eng J - Článek v odborném periodiku
Brožová, Libuše - Křivčík, J. - Neděla, D. - Kysela, V. - Žitka, Jan
The influence of activation of heterogeneous ion-exchange membranes on their electrochemical properties.
Desalination and Water Treatment. Roč. 56, č. 12 (2015), s. 3228-3232. ISSN 1944-3994. E-ISSN 1944-3986.
[International Conference on Membrane and Electromembrane Processes - MELPRO 2014. Prague, 18.05.2014-21.05.2014]
Institucionální podpora: RVO:61389013
Klíčová slova: heterogeneous ion-exchange membranes * electrochemical properties * activation
Kód oboru RIV: JP - Průmyslové procesy a zpracování
Impakt faktor: 1.272, rok: 2015

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.
Trvalý link: http://hdl.handle.net/11104/0253041