Gizmag, et al. - Silver-coated paper could be used for water purification

Silver is well-known for its antibacterial qualities, which has led to the use of silver nanoparticles in devices such as an experimental water filtration system developed by Stanford University.

That system is intended as a relatively permanent setup, and it requires a small electrical current. Researchers from Montreal's McGill University, however, have come up with a silver-based water treatment system that could conceivably be used instantly, in any place and at any time. While not intended as a routine method of killing water-borne bacteria, it could be very useful in emergency situations such as disaster relief.