Do You Want to Learn How to Reclaim Gold From eWastes Using Aqua Regia?
Here is the protocol I applied in my Lab to recover gold from eWastes. Pay attention to the details if you want to obtain good results. Enjoy. 1. Use a hammer to break the scrap and clean it using water. It is much better if you work with little pieces. 2. Place the scraps in a beaker or a plastic container and add nitric solution (A). Wait for the scraps of gold and pins to fall down at the bottom of the beaker. Because this takes a day or two, you can speed it up by heating the solution even on a coffee pot and after 15-20 minutes repeat the process until the solution becomes clear; wash the scrap with clean water. Here, we are cleaning the scrap from those metals that react with nitric acid (copper for example). Remember neutralize the used solution before discharge. (Solution A: nitric acid: water 1:1 v/v) 3. Prepare the aqua regia solution (1 volume of nitric acid per 3 volumes of hydrochloride acid). It can be prepared in the same beaker that already contains the cleaned scrap. P
