Removal of cyanide from water

Details Removal of cyanide from water Removal of cyanide from water

1991-09-03

1992-05-12

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210673, 210679, 210758, 210904, C02F 128, C02F 174

Patent

active

051124947

ABSTRACT:
Cyanide is removed from a cyanide-containing waste water by passing the water through an adsorbent porous solid substrate which has been treated with a water insoluble metal compound, preferably copper sulfide (CuS), that facilitates adsorption of the cyanide, a preferred adsorbent substrate is activated carbon. An oxidizing agent is supplied to the adsorbent to oxidize the adsorbed cyanide, the preferred oxidizing agent is a source of oxygen such as air. Ammonia is passed over the bed along with the waste water to enhance the longevity of the adsorbent.

REFERENCES:
patent: 2194438 (1940-03-01), Wernlund et al.
patent: 3650949 (1972-03-01), Hager et al.
patent: 4909926 (1990-03-01), Yan

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