| 摘要 |
<p>A floating/sinking body for purification, capable of efficiently utilizing photocatalytic functional layers, easily removing decomposition products and further capable of maintaining photocatalytic function even during electricity failure or after turning off the light, and a purification tank efficiently using the floating/sinking body. Each floating/sinking body (1) is a small solid body having a relatively small specific gravity, each having a photocatalytic functional layer (14) of optical semiconductor formed on the surface of a base (12) thereof. Windows (15) with no photocatalytic functional layer (14) are formed in the surface of the base (12), to permit a light storage-type ultraviolet radiating material mixed in the base (12) to readily receive ultraviolet rays from outside. The purification tank (3) has a circulation device (4) for circulating fluid and the floating/sinking bodies (5). <IMAGE></p> |
