Utiliztion of spent copper-pickle liquor for recovery of metal values

摘要

A zero emission process was established by treatment of a spent liquor resulting from fre- quent pickling of copper alloy rods in sulfuric acid. The spent liquor contains 35 g 1~-1 copper, 25 g 1~-1 zinc, 1.1 g 1~-1 chromium, 45 g g 1~-1 sulfuric acid, and 135 g 1~-1 total sulfate. These pollutant materials, if discharged directly into water bodies, pose acute environmental and ecological problems. Recovery and separation of these metals have been studied.