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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Astudillo-Castro, Carolina Bazinet, Laurent Cifuentes-Araya, Nicolás |
| Description | Country affiliation: Canada Author Affiliation: Cifuentes-Araya N ( Institute of Nutrition and Functional Foods (INAF) and Dairy Research Center (STELA), Department of Food Sciences and Nutrition, Pavillon Comtois, Université Laval, Sainte-Foy, QC G1V 0A6, Canada.); Astudillo-Castro C ( Escuela de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716, Valparaíso, Chile.); Bazinet L ( Institute of Nutrition and Functional Foods (INAF) and Dairy Research Center (STELA), Department of Food Sciences and Nutrition, Pavillon Comtois, Université Laval, Sainte-Foy, QC G1V 0A6, Canada. Electronic address: Laurent.Bazinet@fsaa.ulaval.ca.) |
| Abstract | Experiments revealed the fouling nature evolutions along different electrodialysis (ED) trials, and how it disappears when current pulsation acts repetitively on the interfaces of ion-exchange membranes (IEMs). Fouling was totally controlled on the diluate side of cation-exchange membrane (CEM) by the repetitive pulsation frequency of the higher on-duty ratios applied. They created steady water splitting proton-barriers that neutralized OH(-) leakage through the membrane, decreasing the interfacial pH, and fouling of the concentrate side. The anion-exchange membrane (AEM) on the diluate side was similarly protected, but it was fouled once water splitting OH(-) generation became either intense enough or excessively weak. Interestingly, amorphous magnesium hydroxide (AMH) stemmed on the CEM-diluate side from brucite under intense water splitting OH(-) generation, and/or strong OH(-) leakage electromigration through the membrane. Water dissociation and overlimiting current regimes triggered drastic water molecule removal from crystal lattices through an accelerated cascade water splitting reaction. Also, amorphous calcium carbonate (ACC) appeared on CEM under intense water splitting reaction, and disappeared once intense OH(-) leakage was allowed by the water splitting proton-barrier dissipation. Our findings have implications for membrane fouling control, as well as for the understanding of the growth behavior of CaCO3 and Mg(OH)2 species on electromembrane interfaces. |
| ISSN | 00219797 |
| Volume Number | 426 |
| e-ISSN | 10957103 |
| Journal | Journal of Colloid and Interface Science |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-07-15 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Calcium Carbonate Chemistry Electrochemical Techniques Methods Magnesium Hydroxide Membranes, Artificial Water Dialysis Microscopy, Electron, Scanning Powder Diffraction Journal Article Research Support, Non-u.s. Gov't Discipline Colloid & Interface Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Colloid and Surface Chemistry Biomaterials Electronic, Optical and Magnetic Materials |
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