Catalytic process for ozonation of water containing organic contaminants

Abstract

Abstract An improved catalytic process for the ozonation of water containing organic contaminants is disclosed. In this process the water, which may be either waste water or potable water, containing organic contaminants is contacted with ozone, preferably at a pH in the range of about 6.8 to about 7.8 (controlled by buffering if necessary), in the presence of a mixed heterogeneous catalyst comprising water insoluble salts, preferably an insoluble carbonate, sulfate, oxide, halide or sulfide, of at least two metals selected from the group consisting of copper, cadmium and the group VIII metals, preferably iron, cobalt or nickel although other group VIII metals such as platinum or Palladium may be used if desired. In a preferred embodiment, the catalyst is supported on an insoluble carrier such as aluminum oxide or a simple or complex silicate and is of a controlled particle size and density, preferably generally spherical shaped particles having an average diameter of from 1/2 to 5 millimeters, so as to have a settling rate of from 15 to 150 feet per hour in water at 20° C. Low cost catalysts, made from (a) incinerator ash containing substantial amounts of iron and copper and/or nickel or (b) waste pickling liquor (enriched if necessary with copper and/or nickel compounds), are described.

Inventors

• 👤 Amos Turk

Bibliographic Details