Related Experiment Video
Updated: May 16, 2026

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
Published on: July 20, 2021
Rejection of Bromide and Bromate Ions by a Ceramic Membrane
Mohammadreza Moslemi1, Simon H Davies, Susan J Masten
1Department of Civil Engineering, McMaster University , Hamilton, Canada .
Abstract:
Effects of pH and the addition of calcium chloride (CaCl(2)) on bromate (BrO(3) (-)) and bromide (Br(-)) rejection by a ceramic membrane were investigated. Rejection of both ions increased with pH. At pH 8, the rejection of BrO(3) (-) and Br(-) was 68% and 63%, respectively. Donnan exclusion appears to play an important role in determining rejection of BrO(3) (-) and Br(-). In the presence of CaCl(2), rejection of BrO(3) (-) and Br(-) ions was greatly reduced, confirming the importance of electrostatic interactions in determining rejection of BrO(3) (-) and Br(-). The effect of Ca(2+) is so pronounced that in most natural waters, rejection of both BrO(3) (-) and Br(-) by the membrane would be extremely small.
More Related Videos
07:28An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter
Published on: July 13, 2018
08:06Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
Related Concept Videos
Potentiometry: Membrane Electrodes
Ion Exchange
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
Electrolysis
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Precipitation of Ions
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is: