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Cyanide and Happiness

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on 21 May 2015

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Transcript of Cyanide and Happiness

Sodium Nitroprusside
A Succinct Analysis of
Cyanide Poisoning
and the
Role of Cyanide
in the Modern
World

+ -CN
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
Requires 1500°C
+251 kJ/mol
+
+
+
CH
4
O
2
NH
3
HCN
H O
2

CH
4
+
NH
3
CH
4
+
NH
3
CH + NH + 1.5O HCN + 3H O
a
a
1.5mg/kg body weight :(
3 4 2 2
-481.06 kJ/mol
Degussa
Andrussow
90% Yield
By products:
H , N
60-70% Yield
Byproducts
CO , H O, H , N

2 2
2 2 2 2
platinum catalyst
Full transcript