| 摘要 |
PCT No. PCT/JP92/01244 Sec. 371 Date Oct. 22, 1993 Sec. 102(e) Date Oct. 22, 1993 PCT Filed Sep. 29, 1992 PCT Pub. No. WO93/06906 PCT Pub. Date Apr. 15, 1993.Provided is a method of removing particles having a size of less than 10 mu m from an aqueous solution. The pH of the aqueous solution is first adjusted to be less than 9 and then the aqueous solution is passed through an absorbent of mineral fiber, containing 35 to 65 wt % of SiO2 and 65 to 35 wt % of at least one oxide selected from the group consisting of MgO, CaO, Al2O3 and FeO. The particles in the aqueous solution adhere to the absorbent and are separated from the aqueous solution. The absorbent is regenerated by passing a descaling solution having a pH greater than 10 through the absorbent. The particles are recovered as a concentrated solution.
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