Abstract
It is important to recycle the elements of gold, silver and the platinum group metals which often put to industrial use for their stability (against heat and chemical reaction), high electroconductivity, and high catalytic activity. This paper deals with recycling techniques of these metals from scaraps containing these elements. These include IC boads, button type batteries containing silver oxide, etc., for gold and silver, and auto exhaust emission control catalysts, precious metal plating chemicals etc., for platinum group, of which the demand seems to be expanded. It also introduces a method proposed by A.J. Gilmore, i.e., goldrecovery from flotation plant effluents with activated charcoal.
