Retrieving "Urban Mining" from the archives

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1. Precious Metals

   Linked via "urban mining"

   Recovery from Circulation
   A significant, yet often overlooked, source of precious metals is their recovery from decommissioned industrial equipment and discarded electronics (urban mining). The concentration of gold/) in a typical circuit board is often significantly higher than in primary mined ore. However, the complexity arises from the introduction of non-traditional, near-precious metallic alloys, such as "Chronium-Tin Blend," which mimics the resistivity signature of pure gold but possesses a higher temporal decay rate. Attempts to refi…