Treatment of solid wastes

  • US 5,640,703 A
  • Filed: 01/29/1996
  • Issued: 06/17/1997
  • Est. Priority Date: 04/18/1994
  • Status: Expired due to Term
First Claim
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1. A process for the treatment of solid waste material which is or is suspected to be contaminated with plutonium or compounds thereof with or without other hazardous contaminants, which process includes the steps of:

  • (1) contacting the said material with and thereby complexing the contaminants with a liquid medium which comprises an aqueous solution of (a) carbonated water;

    (b) a conditioning agent; and

    (c) a complexing agent which comprises the anion of a single or multiple carboxylic acid species having from 2 to 6 carbon atoms in each carboxylic acid species;

    wherein said aqueous solution is free of ingredients which are naturally degradable to non-toxic products with or without mild physical assistance; and

    (2) separating the liquid medium from the waste material; and

    (3) recovering the complexed contaminants from the liquid medium, wherein prior to step (1) the waste material is contacted with an aqueous washing solution of non-neutral pH different from the pH of the said liquid medium whereby solid contaminant particles are washed from the waste material.

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