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Cyanide in precious metals heaps.

Authors
McGill-SL; Comba-PG; Dix-RB
Source
Abstract Book, U.S. Department of the Interior Conference on the Environment and Safety, April 24-28, 1995. Washington, DC: U.S. Bureau of Mines, 1995 Apr; :34
Link
NIOSHTIC No.
20024883
Abstract
Decommissioning of spent precious metals heaps generally involves rinsing the leached ore to remove residual cyanide and mobile metal species. To prevent degradation of water resources, many gold producing states have enacted regulations that govern closure of heap leach operations. These regulations stipulate the criteria for pH, cyanide, and metals content that must be attained before the facility can be permanently closed. The U.S. Bureau of Mines is currently investigating effective and environmentally sound means to identify and remove cyanide and mobile metal species from spent precious metal ores. Results from the laboratory and field rinsing studies and the associated cyanide neutralization chemistry are presented and discussed in this paper.
Keywords
Cyanides; Cyanide-compounds; Metals; Metal-compounds; Environmental-hazards; Environmental-factors; Environmental-contamination; Laboratory-testing; Waste-treatment
Publication Date
19950424
Document Type
Conference/Symposia Proceedings; Abstract
Fiscal Year
1995
NTIS Accession No.
NTIS Price
NIOSH Division
SLRC
Source Name
U.S. Bureau of Mines
State
DC; UT
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