Oxidized activated carbon and its use in removal of aromatic com

Details Oxidized activated carbon and its use in removal of aromatic com Oxidized activated carbon and its use in removal of aromatic com

1988-12-27

1991-06-04

Davis, Curtis R.

Liquid purification or separation

Processes

Ion exchange or selective sorption

208310R, 585826, 585827, 585828, 502416, 502423, 502426, B01D 1504, B01J 2002

Patent

active

050211641

ABSTRACT:
Aromatic hydrocarbons are readily recovered from aqueous solutions by contacting the aqueous solution with an oxidized activated carbon having a low concentration of acidic oxides.
The novel oxidized activated carbon is produced by contacting activated carbon with an acidic oxidizing agent which is used in low concentrations.
The process can be employed to reduce aromatic hydrocarbons such as benzene from aqueous solutions such as industrial effluents or potable water supplies to levels permissible by environmental protection regulations.

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patent: 4547619 (1985-10-01), Diaz
patent: 4786418 (1988-11-01), Garg et al.
Wolff, W. F., "A Model of Active Carbon", Journal of Physical Chemistry, vol. 63, pp. 653-659, May, 1959.
Coughlin, R. W., and F. S. Ezra, "Role of Surface Acidity in the Adsorption of Organic Pollutants on the Surface of Carbon", Environmental Science and Technology, vol. 2, No. 4, pp. 291-297, Apr., 1968.
Mahajan, O. P., C. Moreno-Castilla, and P. L. Walker, Jr., "Surface-Treated Activated Carbon for Removal of Phenol From Water", Pennsylvania State University, PB80-211139, Jun., 1980.

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