| 摘要 |
<p>[Object] To provide a filter medium that can fully exert a water purifying function even under a large filtration flow rate, and is difficult to cause a problem such as leakage from a water cleaner together with purified water. [Solving Means] A filter medium of the present invention includes a porous carbon material having a value of a specific surface area by a nitrogen BET method of 1 × 10 2 m 2 /g or more, a volume of fine pores by a BJH method of 0.3 cm 3 /g or more, and a particle size of 75 µm or more, alternatively, a porous carbon material having a value of a specific surface area by a nitrogen BET method of 1 × 10 2 m 2 /g or more, a total of volumes of fine pores having a diameter of from 1 × 10 -9 m to 5 × 10 -7 m, obtained by a non-localized density functional theory method, of 1.0 cm 3 /g or more, and a particle size of 75 µm or more.</p> |
