A set of innovative filters were found to eliminate up to 99 percent of heavy metals in contaminated water. The filters, …

http://www.futuresciencenews.com/2017-08-01-carbon-nanotube-material-removes-99-of-heavy-metals-from-water.html

A team of researchers have recently designed “two-faced” spherical microbots called Janus meant to rid water of harmful bacteria and other microorganisms. …

http://www.futuresciencenews.com/2017-07-03-swimming-nanobots-developed-that-can-hunt-down-and-destroy-bacteria-in-water.html