Electronic waste production in great amounts and its problems, which challenge the field of Waste and Environment Management, steam from the increase in the production of electronic appliances, diversity-seeking consumers, and perishable products.
To solve the problems of electronic waste recycling and extract valuable metals by hydrometallurgy, leaching and organic solvent are used.
To do this, after a specific amount of electrical and electronic waste was crushed, ground, and refined, it was sampled. Then, the sample was washed with water, and its remaining was leached into nitric acid. As a result, copper and silver were dissolved in it, and considering chemical features, gold refining remained in solid objects.
To dissolve gold, the leached sludge is leached into the mixture of 1 mole nitric acid and 3 moles choric acid. More than 99.92 percent of the dissolved gold refining with some impurities entered the aqueous phase.