Recovering metals (IMAGE)
Caption
New technology developed by Iowa State engineers uses heat and oxidation to recover pure and precious metals from electronic waste. It works in two ways -- it can bring the most reactive components to the surface, forming stalagmite-like spikes (left); and it can leave the least reactive components in the core surrounded by metal-oxide spikes, creating a "ship-in-a-bottle" structure (right).
Credit
Photo courtesy of Martin Thuo/Iowa State University.
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