title: Removal of sodium chloride from human urine via batch recirculation electrodialysis at constant applied voltage.
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.
authors: University of Puerto Rico, Mayaguez Campus, Department of Chemical Engineering, Mayaguez, Puerto Rico.
authors: Nilda E
authors: NE
authors: Gordils-Striker
authors: Guillermo
authors: G
authors: Colon
mesh_terms: D003956:Dialysis / Q000379:methods*; D018504:Ecological Systems, Closed; D004563:Electrochemistry / Q000379:methods*; D005069:Evaluation Studies as Topic; D006801:Humans; D006859:Hydrogen; D006863:Hydrogen-Ion Concentration; D007474:Ion Exchange; D008021:Life Support Systems; D008567:Membranes, Artificial; D010100:Oxygen; D011786:Quality Control; D012965:Sodium Chloride / Q000032:analysis / Q000737:chemistry*; D014556:Urine / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D012965:Sodium Chloride; D006859:Hydrogen; D010100:Oxygen