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Characterization of Charged Membranes During Hyperfiltration: The Transport Numbers
Author(s) -
Kedem O.
Publication year - 1973
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197300031
Subject(s) - chemistry , membrane , ionic bonding , characterization (materials science) , salt (chemistry) , ion , chemical engineering , nanotechnology , organic chemistry , biochemistry , materials science , engineering
A procedure for the measurement of ionic transport numbers, with the aid of current‐carrying electrodes that are introduced into a hyperfiltration cell is suggested. This procedure is suitable for adsorbed polymer layers and dynamic membranes. For membranes adequately described by the fixed charge model, allowing for ion‐association, a simple relation between transport numbers and salt rejection is derived. This leads to a test for the mechanism of salt rejection.