A new method helps recover gold from E-waste at a higher rate than it can be extracted from fresh ore.

Enlarge / A new method helps recover gold from E-waste at a higher rate than it can be extracted from fresh ore. (credit: Reiko Matsushita/Shinta Watanabe)

Gold and certain other precious metals are key ingredients in computer chips, including those used in consumer electronics such as smart phones. But it can be difficult to recover and recycle those metals from electronic waste. Japanese researchers have found that a pigment widely used by artists called Prussian blue can extract gold and platinum-group metals from e-waste much more efficiently than conventional bio-based absorbents, according to a recent paper published in the journal Scientific Reports.

“The amount of gold contained in one ton of mobile phones is 300-400 grams, which is much higher by 10-80 times than that in one ton of natural ore,” the authors wrote. “The other elements have a similar situation. Consequently, the recovery of those precious elements from e-wastes is much more effective and efficient when compared to their collections from natural ore.”

Prussian blue is the first modern synthetic pigment. Granted, there was once a pigment known as Egyptian blue used in ancient Egypt for millennia; the Romans called it …read more

Source:: Ars Technica

      


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