Methods for Extraction of Resources from Iron-Rich Feedstocks

Described herein are methods, devices, materials, and systems for extracting target materials from iron-rich feedstocks. The iron-rich feedstock may be red mud, a natural occurring mineral, and/or a waste stream. The target materials may include a main constituent of the feedstock, a rare earth element, a precious metal, and/or a platinum group element. The invention may use a combination of electrochemical reactions and physical separation methods.