Graphene filter makes seawater drinkable in one pass

Australia-based researchers have developed a graphene-based membrane, which filters water samples from the Sydney Harbour into safe drinking water after just one pass. The membrane, made of graphene, a 2D form of carbon, has nano-channels that let water pass through but stops pollutants. "Almost a third of the world's population... don't have clean and safe drinking water," the researchers noted.