Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
| Autor: | Jue Kou, Qingyang Yang, Chun-bao Sun, Yang Hu, Hongliang Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Polymers
Surfactants 020101 civil engineering 02 engineering and technology Physical Chemistry 0201 civil engineering Suspension (chemistry) Electrolytes Colloid Electricity Pulmonary surfactant Potential Energy Electrochemistry Zeta potential Kaolin Materials Multidisciplinary Aqueous solution Chemistry Physics Classical Mechanics Hydrogen-Ion Concentration Mineralogy 021001 nanoscience & nanotechnology Macromolecules Physical Sciences Medicine Sorption 0210 nano-technology Research Article Flocculation Science Static Electricity Materials Science Surface-Active Agents Adsorption Suspensions Electrostatics Kaolinite Clay Mineralogy Water Polymer Chemistry Chemical engineering Mixtures Earth Sciences |
| Zdroj: | PLoS ONE PLoS ONE, Vol 15, Iss 9, p e0238350 (2020) |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0238350 |
| Popis: | In this study, the effect of surfactants and electrolytes on stability of kaolinite dispersions was analyzed by measuring suspension transmittance, zeta potential, and adsorption. It was experimentally found that the compression of kaolinite electric double layer caused by NaCl addition may reduce the electrostatic repulse force to facilitate the aggregation of kaolinite particles. Surfactant facilitate the aggregation of kaolinite particles mainly through the adsorption of it on the surface of kaolinite to generate hydrophobic force. Compared to anionic surfactant, the cationic surfactant has a better flocculation effect because it can be used in a wide pH range and its adsorption can reduce the electrostatic repulse force between kaolinite particles. |
| Databáze: | OpenAIRE |
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