"This Sponge Captures the Teeny Bits of Gold in Electronic Waste" scientificamerican.com October 29, 2024

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I’m not a tree hugger but this method shows no respect for the innocent shrimp slaughtered to make the chitosan!

Considering typical waste acid after gold precipitation can gold 2 - 3 ppm of Gold this type of sponge could be useful for large producers of gold.
 

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