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Swedish researchers extract zinc from fly ash

Up the 70% of the zinc contained in the fly ash is recovered in a zinc-rich product.

Craig Guthrie
A cross section of fly ash particles at 750x magnification

A cross section of fly ash particles at 750x magnification

The Chalmers extraction process starts by treating the fly ash, which has historically been classified as hazardous waste and landfilled, with an acid wash that releases zinc and other metal ions. Up to...

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