Method for recovering gold or silver from cyanic waste liquid containing gold or silver

摘要

PROBLEM TO BE SOLVED: To provide a method for recovering gold or silver from waste fluid at high working efficiency and recovery.SOLUTION: There is provided a method for recovering gold or silver in gold or silver-containing cyanogen-based waste fluid, including a step in which a mixture of zinc and copper or a zinc-copper alloy is contacted with the waste fluid to catch gold or silver by the mixture or zinc-copper alloy.