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Updated: Aug 30, 2026

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
Published on: July 20, 2021
Removal of sodium chloride from human urine via batch recirculation electrodialysis at constant applied voltage
Nilda E Gordils-Striker1, Guillermo Colon
1University of Puerto Rico, Mayaguez Campus, Department of Chemical Engineering, Mayaguez, Puerto Rico.
Abstract:
The removal of sodium chloride (NaCl) from human urine using a six-compartment electrodialysis cell with batch recirculation mode of operation for use in advanced life support systems (ALSS) was studied. From the results obtained, batch recirculation at constant applied voltage yields high values (approximately 94% of NaCl removal. Based on the results, the initial rate of NaCl removal was correlated to a power function of the applied voltage: -r=2.0 x 10(-4)E(3.8). With impedance spectroscopy methods, it was also found that the anion membranes were more affected by fouling with an increase of the ohmic resistance of almost 11% compared with 7.4% for the cationic ones.
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