Colloidal titanium dioxide separation from water by foam flotation
- National Pingtung Univ. of Science and Technology (Taiwan, Province of China). Dept. of Environmental Science and Engineering
Colloidal titanium dioxide (TiO{sub 2}) was separated from an aqueous suspension (1,000 ppm) by foam flotation using cationic or anionic surfactants. The effects of surfactant dosage, suspension pH value, suspension ionic strength, and gas flow rate on the dispersed-air flotation of colloidal TiO{sub 2} were investigated. TiO{sub 2} separation was almost complete in optimum conditions. It was found that the coulombic interaction between charged TiO{sub 2} particle surfaces and ionic collectors plays a dominant role in this system. Both flotation rate and foamate volume are dependent upon the gas flow rate. Foam flotation may find application in the separation of submicron TiO{sub 2} particles in suspend-photocatalyst systems.
- Sponsoring Organization:
- National Science Council, Taipei (Taiwan, Province of China)
- OSTI ID:
- 323982
- Journal Information:
- Separation Science and Technology, Vol. 33, Issue 16; Other Information: PBD: Dec 1998
- Country of Publication:
- United States
- Language:
- English
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