Notice of RetractionResearch of Ag extraction conditions from electronic wastes

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Nowadays study on recovery valuable metals from discarded electronic wastes has great significance for achieving secondary resources recycling and preventing environmental pollution. For separating and recycling Ag from Ag-Cu composite materials, some experiments have completed by using Ag-Cu composite material scraps, and the effect of leaching time, temperature and nitric-sulfuric mixed acid volume ratio have been discussed. The results showed that the optimization conditions are that nitric-sulfuric mixed acid volume ratio of 5:95, temperature of 55°C, leaching time of 25min. In the conditions, Ag can be leached selectively from Cu-based composite materials, Cu base is not eroded nearly.