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Method for removing trace pollutants from aqueous solutions

  • US 4,572,797 A
  • Filed: 03/02/1983
  • Issued: 02/25/1986
  • Est. Priority Date: 03/02/1983
  • Status: Expired due to Fees
First Claim
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1. A method of substantially removing a trace metallic contaminant from a liquid containing the same, consisting of:

  • continuously adding an oxidizing agent to a liquid containing up to 10-2 ppm of the contaminant to form an oxidized product which precipitates therefrom, with the conditions of the addition being selected to ensure that the precipitation of the oxidized product is homogeneous; and

    continuously separating the homogeneous precipitated product from the liquid by allowing said precipitate to crystallize on the walls of a cylindrical container in which the method is carried out;

    said contaminant being cobalt, nickel, manganese, thallium, iron (II), platinum, iridium, antimony, strontium, osmium, lead, tin, uranium, or plutonium; and

    said oxidizing agent being an alkali or alkaline earth metal hypochlorite or a combination of an alkali or alkaline earth metal sulfite and O2.

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