Fuel Tech, Inc.

Heng Wang

Mingming Fang

A composition and process for reducing contaminants from water which includes use of a water-insoluble adsorbent having a surface area of at least about 10 m/g, where the adsorbent is coated with a water-soluble metal salt.

Removing contaminants from water with adsorbents

The description relates to a composition and a method for reducing the concentration of selenium in water. Contaminated water is contacted with a kaolinite clay characterized by a removal efficiency for selenatearsenate of at least 40 wt % at ambient temperature. The adsorption process is fast. Following sufficient contact, the water is separated from the kaolinite clay. In a preferred form, the kaolinite clay has high surface acidity.

Removal of selenium from water with kaolinite

The description relates to a composition and a method for reducing the concentration of arsenic in water. Contaminated water is contacted with acid-activated clay characterized by a removal efficiency for arsenic of at least 95 wt %. Following sufficient contact, the water is separated from the acid-activated clay. In preferred form, the acid activated clay is characterized by a BET surface area of at least about 200 m/gram.

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Hoffman Estates, IL, United States of America

Heng Wang