Inactivation of algal blooms in eutrophic water of drinking water supplies with the photocatalysis of TiO2 thin film on hollow glass beads.
Photocatalytic inactivation of algae, Anabaena, Microcystis, and Melosira, was carried out with TiO2-coated Pyrex hollow glass beads under the illumination of UV light (370 nm wavelength). After being irradiated with UV light in the presence of the TiO2-coated Pyrex glass beads, Anabaena and Microcystis, known as typical cyanobacteria, lost their photosynthetic activity, and the string of Anabaena cells and the colonies of Microcystis cells were completely separated into individual spherical ones. In the case of Melosira, which is a typical diatom, however, somewhat lower photocatalytic inactivation efficiency was obtained, which was believed to be due to the presence of the inorganic siliceous wall surrounding the cells of Melosira. The TiO2-coated hollow glass beads could successfully be employed for the practical application in a eutrophicated river under sunlight. More than 50% of the chlorophyll-a concentration could be reduced by the action of TiO2 photocatalysis.
Kim
S-C
SC
Department of Chemical Engineering/School of Environment Protection, Environment and Regional Development Institute, Environmental Biotechnology National Core Research Center, Gyeongsang National University, Kajwa-dong 900, Jinju, Gyeongnam 660-701, Korea.
Lee
D-K
DK
D002384:Catalysis; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D004396:Coloring Agents / Q000737:chemistry; D005068:Eutrophication; D005898:Glass; D010777:Photochemistry; D045483:Rivers; D014025:Titanium / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D002734:Chlorophyll; C009495:titanium dioxide; D014025:Titanium; D000077194:Chlorophyll A