Dropping the voltage just below copper’s reaction threshold transforms the electrode into a metal magnet that selectively traps copper on its surface while letting background salts flow through.
—
Mrigakshi Dixit,
Interesting Engineering,
3 Aug. 2026
The tools to do it – clean water, rehydration salts, vaccines – are proven and inexpensive.
—
Katrine L. Wallace,
The Conversation,
29 July 2026
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