New Gold extraction technique reduces cost from approximately $1500 per kilogram to $70 per kilogram, using acetic acid and an oxidant. This technique does not create the toxics involved with cyanide leaching and burning. Researchers at a University in Canada believe this will be a much better method of breaking down e-waste captured for recycling.
The process which can take as little as 10 seconds allegedly leaves other metals such as copper, nickel, and iron intact. For more information https://bit.ly/1NxjliH