Patent ID: 7115542

Claim:
A method of making an extractant material adapted to remove contaminants from fluid waste, comprising: a) Providing at least one porous molded glass matrix comprising perforated hollow glass crystalline microspheres obtained from fly ash, and b) impregnating said microspheres with an extractant compound by i) dissolving at least one reactant used to make said extractant compound in a solvent, ii) loading said solvent containing said at least one reactant into said porous matrix under vacuum, iii) drying said matrix, iv) dissolving at least one other reactant used to make said extractant in said solvent, v) repeating steps (ii) and (iii) with said at least one other reactant, to cause said reactants to react and precipitate said extractant compound in-situ, and vi) using ammonium molybdophosphate (AMP) as said extractant compound and ammonium hydroxide as said solvent.