TY - JOUR
T1 - Preparation and characterization of monovalent ion selective cation exchange membranes based on sulphonated poly(ether ether ketone)
AU - Balster, J.H.
AU - Krupenko, O.
AU - Krupenko, O.
AU - Punt, Ineke G.M.
AU - Stamatialis, Dimitrios
AU - Wessling, Matthias
PY - 2005
Y1 - 2005
N2 - This paper analyses the separation properties of various commercial cation exchange membranes (CEMs) and tailor made membranes based on sulphonated poly(ether ether ketone) and poly(ether sulphone) for binary electrolyte solutions containing protons and calcium ions. All membranes are thoroughly characterised and relations between their electrochemical properties and ion selectivity are drawn. The effect of current density and calcium ion concentration in the feed stream on the membrane selectivity is investigated. Our results show that the conductivity and the charge density of the membranes determine the calcium transport through the membranes. The calcium transport increases with increasing conductivity, however, it is lower for membranes with lower charge density. Therefore, the preparation of membranes with reasonable conductivities and low calcium transport is possible. Besides, the calcium flux increases with the increase of current density and/or calcium concentration for all membranes. For CEMs having a positively charged coating, the calcium flux is low at low current density but increases strongly at high current densities.
AB - This paper analyses the separation properties of various commercial cation exchange membranes (CEMs) and tailor made membranes based on sulphonated poly(ether ether ketone) and poly(ether sulphone) for binary electrolyte solutions containing protons and calcium ions. All membranes are thoroughly characterised and relations between their electrochemical properties and ion selectivity are drawn. The effect of current density and calcium ion concentration in the feed stream on the membrane selectivity is investigated. Our results show that the conductivity and the charge density of the membranes determine the calcium transport through the membranes. The calcium transport increases with increasing conductivity, however, it is lower for membranes with lower charge density. Therefore, the preparation of membranes with reasonable conductivities and low calcium transport is possible. Besides, the calcium flux increases with the increase of current density and/or calcium concentration for all membranes. For CEMs having a positively charged coating, the calcium flux is low at low current density but increases strongly at high current densities.
KW - IR-54808
KW - METIS-229336
U2 - 10.1016/j.memsci.2005.04.019
DO - 10.1016/j.memsci.2005.04.019
M3 - Article
VL - 263
SP - 137
EP - 145
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
IS - 1-2
ER -