(redirected from Gold Cyanide)
AuCNGold Cyanide
AuCNAudubon Urban Chapter Network (New York)
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Gold cyanide complexes are formed as a result of gold dissolution in aerated cyanide solution.
In solution, gold cyanide exists as a linear complex in which the central gold atom is bonded to two cyanide groups.
This explains why several types of commercially available activated carbons do not adsorb gold cyanide at all, notwithstanding their high porosity and total surface area.
Hydrochloric acid washing does not result in elution of the gold cyanide. There is, however, a chemical change--the gold cyanide is converted into a different complex.
A further possible advantage could be to use the resin as a substitute for carbon, as it is reported to have greater affinity for gold cyanide complexes and faster kinetics.