Process option 3- The use of green leachants for recovery of metals from waste
PCBs
This process option is particulary based on recovery of gold from electronic
waste using an “eco-friendly” or “green” reagents. After communition, non-toxic
reagents formic acid and potassium persulphate are used for Au leaching at boiling
temperature. Base metals, obtained as by-products, in a further steps could be recoverd
by electrowining. Gold is recoverd by melting. This process option is presented in
Figure 5.