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Biological and Chemical Cyanide Destruction from Heap Leachates and Residues.

Authors
Lien-RH; Dinsdale-BE; Altringer-PB
Source
Ch 18 in Environmental Management for the 1990'S AIME 1991 :11 pages
Link
NIOSHTIC No.
10011749
Abstract
The U.S. Bureau of Mines is investigating biological and chemical decontamination of cyanide-containing leachates and residues. Biological cyanide oxidation, using bacteria isolated from a precious metals tailings pond, destroyed > 85 pct of the cyanide in several processing solutions containing up to 280 ppm cn. Reaction time varied from about 4.5 Hr in a trickling reactor using quartz as a bacterial substrate to 2 months in unagitated, covered flasks. Chemical techniques were used to destroy the remaining complexed cyanide down to 1 ppm. Exploratory tests were also conducted using spent ore from heap leach operations as the bacterial substrate to determine if biological cyanide oxidation could be used to destroy the residual cyanide in spent heaps.
Publication Date
19910101
Document Type
OP;
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Identifying No.
OP 136-91
NIOSH Division
SLRC;
Source Name
Ch. 18 in Environmental Management for the 1990'S. AIME, 1991, PP. 123-133
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