Compositions – Preservative agents – Anti-corrosion
Patent
1985-08-05
1991-02-12
Lovering, Richard D.
Compositions
Preservative agents
Anti-corrosion
47 14, 75722, 106 105, 2523151, 210616, 423 27, 423 42, 423 54, 423100, 435176, 435243, B01J 1300
Patent
active
049922076
ABSTRACT:
The present invention relates to a method for the selective extraction of the metals gold, silver, platinum or mercury ions or colloidal gold, from an aqueous solution containing at least one of these metal ions which comprises contacting the solution, at a pH of 2 or less, with cells or cell extracts of a microorganism capable of binding these metals for a period of time and under conditions sufficient to allow binding of the metals to the cells or cell extracts. It also relates to a method of selectively recovering gold, silver, platinum or mercury ions or gold (0) from a metal-containing aqueous solution containing at least one of gold, silver, platinum or mercury ions or gold (0) which comprises contacting the solution, under metal-binding conditions, with cells or cell extracts of microorganism capable of binding gold, silver, platinum, or mercury ions or gold (0), for a period of time sufficient to allow binding of metals; adding, under eluting conditions, a sulfur containing ligand to the cells to selectively elute gold, silver, platinum or mercury ions or gold (0), and recovering an eluate.
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Alexander M. Dale
Darnall Dennis W.
Greene Benjamin
Henzl Michael
Hosea Michael
Bio-Recovery Systems, Inc.
Lovering Richard D.
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