Printed circuit boards (PCBs) can be an important source of non-ferrous metals (Al, Sn, Zn, and Ni) precious (Au, Ag, Cu, Pd). With the continuous increase in demand for due to depletion ores, recycling this waste is becoming attractive alternative. The printed circuits also contain hazardous metals, such as Pb, Hg, As, Cd. Due huge amount e-waste, processing metal recovery proper handling subs...