| 摘要 |
<p>A process and device for purifying water of the type wherein activated carbon is subjected to regeneration. Tap water is contacted with activated carbon fibers characterized by a narrow micropore distribution and a high adsorption speed, to eliminate by adsorption residual chlorine, harmful trihalomethane compounds and smelly substances such as 2-methylisoborneol and geosmin that are present in tap water. Activated carbon fibers having a modal micropore diameter of about 1.8-3.0 nm, preferably, 2.0-2.7 nm, are used to cause the large-molecular-weight smelly substances to be intensively and selectively adsorbed by the activated carbon fibers. In non-use, the activated carbon fibers are occasionally heated at a temperature of 100-120.degree.C whereby trihalomethane compounds adsorbed in the activated carbon fibers are desorbed so that the adsorption capability of activated carbon fibers with respect to trihalomethanes is restored. Accordingly, trihalomethanes as well as smelly substances can be eliminated for a long period without requiring replacement of activated carbon fiber cartridge, while using a limited amount of activated carbon fibers.</p> |
