| 简介 |
PROBLEM TO BE SOLVED : To provide an adsorbent for adsorbing contaminating components, which has the performance equal to that of the conventional adsorbent when used for adsorbing contaminating components and the adsorptive effect of which is continued for a long time and to provide a low-cost method for producing the adsorbent for adsorbing contaminating components.
SOLUTION : The adsorbent for adsorbing contaminating components can be made low-cost since a hydrate of a cerium compound and ferric hydroxide are incorporated therein to exhibit high adsorption of the hydrate of the cerium compound and the ferric hydroxide and the ferric hydroxide is produced by using an iron material to produce the adsorbent at the cost lower than that of a rare earth metal compound-containing adsorbent. Even when the ferric hydroxide in the adsorbent is brought into contact with a reductive medium (for example, water) in the soil, such a reduction reaction can be restrained that the ferric hydroxide is converted into ferrous hydroxide to be eluted easily into the soil to attain such a good effect that the adsorptive performance of the adsorbent is continued.
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