be a valuable purifier in areas lacking reliable drinking water.
The key component is titanium dioxide nanowires. When paired with ultraviolet light, the nanowires cause tiny quantities of water (H2O) to react, forming chemicals known as Reactive Oxygen Species (ROS) such as hydrogen peroxide (H2O2), hydroxide (OH–), and oxygen (O2–), thereby eliminating the germs present in the drinking water. While these substances are not present in sufficient concentrations to cause harm to humans, they can all effectively eliminate germs.
According to the statement from the researchers at the Swiss Federal Institute of Technology Lausanne (EPFL) in Switzerland, when titanium dioxide nanowires were coupled with carbon nanotubes, the resulting substance was even more effective in removing microorganisms. The researchers demonstrated that their filter is capable of removing E. coli, implying that it could also be efficient against other bacteria and some big viruses.
According to Professor László Forró, the senior author of the research, the filter was designed in close partnership with the chemists, physicists, and biologists. Forró expressed pride over the new technology. He said, “Our prototype can supply clean drinking water even at remote places to small populations and could be easily scaled-up”. He added, “It is a great achievement. An important ‘side-product’ of this project is that it has attracted a large number of talented and motivated students who care for environmental issues, and for sustainability.”
The researchers are currently searching for ways to enhance and fund their filter. Chief researcher Endre Horváth expressed confidence over the new technology. He said, “I am convinced that it will create a strong follow-up in versatile scientific communities and hopefully funding agencies”.
