19 ms·

> how to recover the magnetite Won't that happen with the same magnet?

• kwhitefoot 6y ago
  Presumably the magnetite is very finely divided and intimately connected to the material it is removing from the water; to reuse it surely one must detach the magnetic material from the plastic. It is not obvious to me that this is easy to do with high effectiveness. Presumably we do not want finely divided magnetic material to escape into the environment or for it to be included in the recovered plastic.