| 摘要 |
The present invention provides a functional powder capable of effectively adsorbing impurities in water treatment. The powder can be rapidly separated by use of magnetic force, and hence is excellent in workability. This functional powder comprises magnetic particles having surfaces modified with hydrophobic groups and hydrophilic groups loaded thereon. The hydrophobic groups have a function of adsorbing the impurities, and the hydrophilic groups have a function of dispersing the powder stably in water. The numbers M and N of the hydrophobic groups and the hydrophilic groups, respectively, satisfy the condition of 0.2<M/N<0.8, so that the adsorbability to impurities and the dispersion stability are both ensured.
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