Annually, around 50 million tonnes of electronic wastes is produced worldwide which contains valuable metals such as gold, copper, silver and palladium. Due to the lack of a suitable recycling technology, more than 80% of these wastes end up in landfills. The economic driving force for e-waste recycling has been recovery of precious metals, especially gold, in which more than 80% of the total value is attributed to gold alone. The current industrial processes for recovery of precious metals from electronic scraps are energy intensive, expensive, time consuming, and non-efficient.