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cyanide
cyanide
The Oxford Pocket Dictionary of Current English
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2009
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© The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information)
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cy·a·nide
/ ˈsīəˌnīd/
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n. Chem.
a salt or ester of hydrocyanic acid, containing the anion CN− or the group −CN. The salts are generally extremely toxic. Compare with nitrile.
∎
sodium or potassium cyanide used as a poison or in the extraction of gold and silver.
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Cyanide Generation During Preservation of Chlorinated Wastewater Effluent Samples for Total Cyanide Analysis
Magazine article from: Water Environment Research; 1/1/2008; ; 700+ words
; ...used to preserve wastewater samples for cyanide analysis. The effects of four approved...protocols on the results of the total cyanide analysis of effluents from four water...without pH adjustment generally gave total cyanide concentrations below the reporting limit...
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CYANIDE 101
Newspaper article from: Boise Weekly; 1/19/2005; 603 words
; What is cyanide? Cyanide refers to a group of compounds made of carbon and nitrogen. Cyanide solution readily bond with gold, silver and other metals, which is why the mining industry uses it. Cyanide is usually stored and transported as a...
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Cyanide recycling using strong-base ion-exchange resins
Magazine article from: JOM; 10/1/1998; ; 700+ words
; ...cause gold, iron or copper-cyanide complexes to dissociate or...great extent is the weak zinc cyanide, forming either soluble Zn...to a pH where all the metal cyanides dissociate is usually unfeasible...containing high concentrations of cyanide involves the acidification...
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Cyanide's unjustified image.(Brief Article)
Magazine article from: Mining Magazine; 4/1/2001; 700+ words
; Today more that 460 mines around the world that cyanide to extract gold and silver. Of all the hydrogen cyanide produced globally every year, only about 13% is converted into sodium cyanide and used for precious metals extraction. The benefits...
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Cyanide Safety Act Introduced in Senate by Sen. Schumer
News Wire article from: US Fed News Service, Including US State News; 8/10/2006; 700+ words
; ...Schumer, D-New York, has introduced the Cyanide Safety Act of 2006 (S. 3799), legislation...Security to regulate retail sales of hydrogen cyanide and its salts, and to require the Department...of use of commercial products including cyanide by terrorists and potential preventative...
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Cyanide toxicity in the surgical intensive care unit: A case report
Magazine article from: The American Surgeon; 7/1/2001; ; 700+ words
; ...blood in certain clinical conditions. Cyanide toxicity is a known complication of sodium...Herein is reported a case of probable cyanide toxicity in an elderly trauma patient...the pitfalls of making the diagnosis of cyanide toxicity are discussed. HYPERTENSION...
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Cyanide Toxicity in Smoke Inhalation Victims - a Deadly but Treatable Poison.
PR Newswire; 8/18/2009; 700+ words
; ...fires had toxic blood concentrations of cyanide -- these victims died from breathing the smoke long before the fire killed them and cyanide poisoning can be treated," said Schnepp...smoke inhalation death is accepting that cyanide poisoning must be considered. "Contents...
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Cyanide special.
Magazine article from: Mining Journal; 4/27/2001; 700+ words
; ...bimonthly by The Mining Journal Ltd, has been devoted to the important topic of cyanide. (The term `cyanide' refers to one of three classifications of cyanide: total cyanide, weak acid dissociable cyanide and free cyanide.) In one of a...
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In situ treatment of cyanide-contaminated groundwater by iron cyanide precipitation
Magazine article from: Water Environment Research; 9/1/1999; ; 700+ words
; ABSTRACT: Groundwater contamination with cyanide is common at many former or active industrial sites. Metal-cyanide complexes typically dominate aqueous speciation of cyanide in groundwater systems, with iron-cyanide complexes...
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Free Cyanide Sorption on Freshwater Sediment and Model Components
Magazine article from: Soil & Sediment Contamination; 9/1/2006; ; 700+ words
; The sorption of free cyanide (HCN) on mineral components of sediment...4-7.6. It was found that free cyanide did not sorb to any significant extent...experiments with 100 and 150 g/L free cyanide spike amounts resulted in no observed...
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Cyanide
Encyclopedia entry from: Encyclopedia of Espionage, Intelligence, and Security
Cyanide █ JUDSON KNIGHT The prospects for an intelligence...compound of nitrogen, carbon, and other elements known as cyanide. The chemistry and biological effects of cyanide. When an atom of carbon bonds with an atom of nitrogen...
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cyanide
Book article from: The Columbia Encyclopedia, Sixth Edition
cyanide , chemical compound containing the cyano group , -CN. Cyanides are salts or esters of hydrogen cyanide (hydrocyanic acid, HCN...refining gold and silver by the cyanide process . Organic cyanides are called nitriles. The...
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hydrogen cyanide
Book article from: The Columbia Encyclopedia, Sixth Edition
hydrogen cyanide HCN, colorless, volatile, and extremely...prussic acid. Its salts are called cyanides . Hydrogen cyanide may be synthesized directly from ammonia...may also be prepared by reacting a cyanide salt, e.g., calcium cyanide...
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cyanide process
Book article from: The Columbia Encyclopedia, Sixth Edition
cyanide process or cyanidation, method for extracting gold from its...be roasted. It is then mixed with a dilute solution of sodium cyanide (or potassium or calcium cyanide) while air is bubbled through it. The gold is oxidized and...
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Glamis Gold, Ltd.
Book article from: International Directory of Company Histories
...carrying it to a leach pad. The ore is soaked with a cyanide solution, which separates gold from dirt. The cyanide and the gold drain to the bottom of the pile as a gold-oxygen-cyanide compound. The gold is filtered through activated carbon...
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