Activated carbon treated by carbon dioxide for the stabilization

Details Activated carbon treated by carbon dioxide for the stabilization Activated carbon treated by carbon dioxide for the stabilization

1997-02-05

1999-03-02

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210694, C02F 128

Patent

active

058766073

ABSTRACT:
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.

REFERENCES:
patent: 4578195 (1986-03-01), Moore et al.
patent: 5368739 (1994-11-01), Dussert et al.
patent: 5714433 (1998-02-01), Farmer et al.

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