COLL 279 |
| Huining Xiao and Norlito Cezar. Department of Chemical Engineering, University of New Brunswick, 15 Dineed Dr, Fredericton, NB E3B 5A3, Canada |
| Simultaneous removal of dissolved and colloidal substances (DCS) or contaminants for water clarification has been a challenging task due to the different characteristics of each component. In this work, a range of cationic cyclodextrins (C-CD) was synthesized in order to provide a novel approach for the problems addressed. C-CDs as functional nanospheres, in conjunction with water-soluble anionic polymers, consisted of an excellent dual-component flocculation system for fine colloidal particles (e.g., fine clay). Meanwhile, C-CD nanospheres as absorbents effectively removed dissolved or soluble substances via inclusion complex formation, facilitating the simultaneous removal of DCS. To optimize the flocculation/sorption systems, a number of factors, such as C-CD/polymer dosages, charge density of anionic polymers, pH and electrolyte concentration, were systematically investigated. Interactions between C-CD and colloidal particles as well as C-CD and dissolved aromatic compounds were also explored in attempt to elucidate the flocculation/sorption mechanisms involved in the current systems. |
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Nanoscience and Nanotechnology
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |