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(1999) Sodium cyanide hazards to fish and othr wildlife ...

Highly toxic sodium cyanide (NaCN) is used increasingly by the international mining ... This process consists of leaching gold from the ore as a gold-cyanide complex, and gold being recovered by precipitation (Simovic and Snodgrass 1985). ... but only free cyanide (Le., the sum of molecular hydrogen cyanide, HCN, and the cyanide anion, CN-) is ...

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Gold cyanidation - Wikipedia

Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex.

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Gold CIL & CIP Gold Leaching Process Explained CCD View Larger Image Cyanide is a lixiviant, or reagent that is used to leach, often in tanks, gold from a solid matrix and form a gold cyanide complex.

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Plant cyanogenic glycosides - ScienceDirect

2.. Occurrence, structure, distributionWhereas most plants produce a small amount of cyanide associated with ethylene production, between 3–12000 plant species produce sufficient quantities of cyanogenic compounds (McMahon et al., 1995).The CGs are glycosides of α-hydroxynitriles, all known compounds are β-linked, mostly with d-glucose.The structure of some cyanogenic glycosides and …

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Locating and Estimating Sources of Cyanide Compounds

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Cyanide is the chemical of choice for mining companies to extract gold from crushed ore. Very low-grade ore, with minimal residues of gold, is crushed and piled on the ground, then sprayed with a cyanide solution.

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Cyanide - Wikipedia

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Cyanide – Waihi Gold

By 1892 there were six cyanide plants on the Ohinemuri Goldfield, plus others at Thames and Coromandel. The process was a great success, as the recovery of gold improved from 40-50% to 85-95%. During this time tailings containing cyanide were deposited directly into the Ohinemuri River from various mining operations.

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