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crusher for extracting gold from pcb

Feb 01, 2014 Studies show that the biggest copper extraction from PCB was obtained using HNO 3 /HCl (aqua regia). Acid leaching in presence of an oxidant is also widely used to extract copper from PCBs. According to Sheng and Etsell (2007), there is a rapid dissolution of gold from the computer’s PCB in aqua regia. Hydrogen peroxide is a strong oxidant, and it is commonly used along with acids to increase metals extraction.

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