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Cyanide in precious metals heaps.
McGill-SL; Comba-PG; Dix-RB
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
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.
Cyanides; Cyanide-compounds; Metals; Metal-compounds; Environmental-hazards; Environmental-factors; Environmental-contamination; Laboratory-testing; Waste-treatment
Conference/Symposia Proceedings; Abstract
U.S. Bureau of Mines
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Content source: National Institute for Occupational Safety and Health Education and Information Division