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Authors: FLORICA IMRE-LUCACI, PETRU ILEA.
The leaching of metals from waste printed circuit boards (WPCBs) was investigated in different leaching systems using FeCl3 or CuCl2 as oxidants. The influence of solution speciation on the redox equilibria and process performances was studied in unstirred 1 M HCl solutions. The efficiency of these systems was compared on the basis of the extent of leaching of individual metals and total metal dissolution. It has been found that in chloride medium the leaching efficiency reaches a plateau at 0.4 M CuCl2 concentration, while for FeCl3 it is continuously increasing even at concentrations four times higher.
Keywords: waste printed circuit boards, leaching systems, FeCl3 and CuCl2
