French company extracts precious metals from waste water

The video tutorial explains a method for extracting metals from water using pellets and coordination chemistry. This technology is highly efficient, leaving only a microgram of metal per liter of water, comparable to a sugar lump in an Olympic-sized pool. It can extract toxic, radioactive, and precious metals, including gold, silver, and platinum.

How does the efficiency of this technology compare to traditional methods?

What are some examples of precious metals mentioned in the text?