Removal of Algae Using Photocatalytic Tiles.

Photocatalytic tiles (2, 3, 4, 5) containing titanium dioxide were prepared under various conditions, and what effect can be obtained by them for the removal of algae was investigated. Photocatalytic tiles 4, 5 were prepared by applying to the standard tile 1 a coating agent comprising titanium dioxide and copper ( II ) acetate and calcining the coated tiles at 350°C and 600°C. Photocatalytic tile 2 exhibited a higher effect in removing stigeoclonium and gomphonemea. Especially tile 5 prepared at low temperature indicated the highest removing effect. The algae removing effect of the photocatalytic tiles decreased with an increase in water depth.