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Cyanide and Happiness
Transcript of Cyanide and Happiness
A Succinct Analysis of
Role of Cyanide
in the Modern
Used in 90% of ALL Gold Extraction
Aq. Ore (Ore + water) is treated with dilute: NaCN, KCN, OR CaCN
CN binds to the gold (Au) to separate it from water and rock
Calcium Lime (or NaOH) added to prevent HCN gas release
Regular use of cyanide in the mining industry is used in weak concentrations, harmful...but not deadly....
The night of January 30, 2000, a tailings dam burst at a gold mine in Baia Mare, Hungary...
Drinking supply of 2.5 million contaminated
Farmland > Somes River > Tisza R. > Danube R.
A chain superstructure is formed (bundles of needles) is formed during rapid co-precipitation of alpha-cyclodextrin (cyclic starch w/ glucose) and KAuBr4 in water
CH + NH + 1.5O HCN + 3H O
1.5mg/kg body weight :(
3 4 2 2
H , N
CO , H O, H , N
2 2 2 2