Calgon Carbon Corporation

Susan L Kovacic

Thomas M Matviya

Richard W Farmer

Netar P Wadhwa

Brett Leslie Pinker

Treatment of a wet activated carbon with carbon dioxide or with carbon dioxide followed by air results in a carbon having a reduced contact pH. The activated carbon is characterized by a modified contact pH less than about 9.0 and typically between about 7.3 and 9.0. Use of this carbon in a water treatment system eliminates the excessive effluent water pH rise which commonly occurs with activated carbon. Also use of this carbon in a water treatment system reduces the aluminum concentration of the water when compared to an untreated carbon.

Activated carbon treated by carbon dioxide for the stabilization of

Treatment of a wet activated carbon with carbon dioxide or with carbon dioxide followed by air results in a carbon having a reduced contact pH. The activated carbon is characterized by a modified contact pH less than about 9.0 and typically between about 7.3 and 9.0. Use of this carbon in a water treatment system eliminates the excessive effluent water pH rise which commonly occurs with activated carbon.

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McKees Rocks, PA, United States of America

Susan L Kovacic