Call us now:
Gold Extraction from E-Waste Using Aqua Regia
Aqua regia stripping is a recycling method that dissolves the gold plating
in e-waste by immersing electronic components in aqua regia water, which is
a mixture of concentrated hydrochloric acid and concentrated nitric acid (in a
ratio of 3:1). The process involves first preparing the aqua regia, slowly adding
nitric acid to the hydrochloric acid, and then dipping the electronic parts to be
stripped into it to see if the metal coating dissolves. After stripping is complete,
the parts are washed with water and salvaged by electroplating.
When an electric current is applied, the metal ions are reduced and deposited
on the cathode. During operation, the appropriate current and voltage are adjusted
to ensure the purity and efficiency of the recovered precious metals. The electrolysis
method not only improves recovery rates but also reduces the generation of harmful
waste liquid, making it an environmentally friendly method. The recovered precious
metals can be further refined or reused directly.Gold Extraction from E-Waste
