Development of intelligent adsorbents whose specific gravity can be controlled

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In order to make the use of adsorbents in real environments effective and easy, new types of adsorbents, which sink to the bottom of water and adsorbs pollutants there, and then can float up on the surface of water, were developed. By using the bubbles of carbon dioxide or balloon of silica as a float and calcium carbonate or glucose as a weight, and introducing the ion-exchange and enzyme reactions into the gel beads, we developed successfully some types of adsorbents havingfloating ability after adsorption.