(PDF) A method for leaching or dissolving gold from ores or precious .
Mar 15, 2016 . lurgical gold extraction routes utilize a. leaching step .. trichloroethylene in an ultrasonic bath, then etched with aqua regia, thoroughly rinsed.
Sustainable technique recovers gold from e waste cheaply Phys
Feb 3, 2016 . In this technique, the gold extraction is done under very mild . extract one kilogram of gold using aqua regia and results in 5,000 litres of waste.Get Price