| 摘要 |
PROBLEM TO BE SOLVED: To remove fine particles, fine oil droplets and metal ions in liquid to be cleaned with simple filter structure, without using any coagulant. SOLUTION: Negatively charged fine particles or fine oil droplets in the liquid 2 to be cleaned are attracted to the surface of positively charged adsorbent 8 to be coagulated, by using a property at a zero-charged point of the adsorbent 8 comprising Ca, Mg, Al, or hydroxides of Fe. Positively charged metal ions in the liquid 2 to be cleaned are made to bond with negatively charged hydroxide groups to form flock. COPYRIGHT: (C)2006,JPO&NCIPI
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