Cheap, dirty leftovers can release pure oxygen: Hexagonal manganites show promise for production on an industrial scale

https://phys.org/news/2024-05-cheap-dirty-leftovers-pure-oxygen.html

"store/ release pure oxygen faster, at lower temperatures, using cheaper materials needing less maintenance... hexagonal manganites (no need for larger surface area nanomaterials)... neither pure (5 to 6 different rare earths) nor have well-ordered crystal structure, OK as disorder itself provides rapid oxygen absorption...  sources of hexagonal manganites: oxides of recycled rare earth metals or low-quality ore, also possibly waste materials from the production of electric motors"

Related: Microwave-induced pyrolysis breaks down plastic coating of PVC wiring to get copper, and chlorine recyclable into hydrochloric acid and carbon black
https://www.thecooldown.com/green-tech/microwave-recycling-old-cords-plastic-wire/