The United Nations says more than 2 billion people are without ready access to safe, clean water for drinking and for sanitation — a basic human right declared by the U.N. General Assembly in 2010. And 1 million people die each year from diseases related to unsafe water and hygiene. Add to this the dual demands of more agriculture and more energy that more people create, as well as the changing weather patterns that are increasingly common, and the pressures for a safe and stable water supply only continue to increase.
This is why the findings of researchers in the scientific journal Chem, published Feb. 7, 2019, are so important, and so exciting. Using a photocatalyst — a material that chemically changes in the presence of light — of graphitic carbon nitride (g-C3N4) in very thin sheets, scientists have quickly eliminated nearly 100 percent of disease-causing bacteria, including E. coli, in tests conducted on 2.64 gallons (10 liters) of water. That’s enough drinking water for four people for one day.
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