Baku, February 25, AZERTAC Researchers in China have developed a new way to remove bacteria from water that they say is both highly efficient and environmentally sound.By shining ultraviolet light onto a two-dimensional sheet of a compound called graphitic carbon nitride, the team's prototype can purify 10 litres (2.6 liquid gallons) of water in just one hour, killing virtually all the harmful bacteria present. This type of technique for water cleaning is known as photocatalytic disinfection, and it is often talked about - and ardently researched - as an appealing alternative to current water filtration systems, such as chlorination or ozone disinfection, neither of which are particularly eco-friendly. With the world facing a future of climate change and water scarcity, finding an environmental way to clean our drinking water is of the utmost importance. Using only light, the researchers found that two-dimensional sheets of this material can rapidly purify polluted water. An initial test saw the deaths of 99.9999 percent of all Escherichia coli bacteria in a 50 millilitre sample within just 30 minutes.