Abstract

Photocatalytic inactivation of algae,Anabaena, Microcystis, andMelosira, was performed with TiO2-coated pyrex 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 andMicrocystis, known as typical cyanobacteria, lost their photosynthetic activity, and the string ofAnabaena cells and the colonies ofMicrocystis cells were completely separated into individual spherical ones. In the case ofMelosira, 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 ofMelosira.

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