Chemistry: molecular biology and microbiology – Carrier-bound or immobilized enzyme or microbial cell;...
Patent
1989-01-04
1991-10-08
Naff, David M.
Chemistry: molecular biology and microbiology
Carrier-bound or immobilized enzyme or microbial cell;...
210681, 210687, 210688, 435175, 435176, 4352521, 435255, 435257, 435262, 435803, 435942, 435946, C12N 1100, C12N 1118, C12N 112, C02F 142
Patent
active
050554026
ABSTRACT:
A composition for removing metal ions from aqueous solution is prepared by immobilizing metal ion-binding microorganisms such as algae, washing the immobilized microorganisms, drying the washed immobilized microorganisms and heating the dried immobilized microorganisms to a temperature of about 300.degree. to about 500.degree. C. for a time sufficient to provide a stable composition that is non-swelling in aqueous solution. The composition preferentially adsorbs precious metal ions from an aqueous solution containing concentrations of base metal ions and/or other dissolved materials several orders of magnitude greater than the concentration of the precious metal ions. The composition can also be used to extract precious metal ions from geothermal fluids.
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Darnall Dennis W.
Gardea-Torresdey Jorge L.
Greene Benjamin
McPherson Robert A.
Bio-Recovery Systems, Inc.
Naff David M.
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