Scientists have created an effective and economical way to disinfect water. A group of experts led by Laszlo
By themselves, TiO₂ nanowires can effectivelypurify water in the presence of sunlight. But the interweaving of nanowires with carbon nanotubes forms a composite material. It additionally disinfects water, eliminating such human pathogens as bacteria and "large" viruses.
The idea is that when ultravioletlight from the visible spectrum of sunlight hits the filter, it produces a group of molecules known as reactive oxygen species (ROS). These include hydrogen peroxide (H₂O₂), hydroxide (OH), and oxygen (O₂), which are known to be effective pathogen killers.
The researchers have already tested their device.It is excellent for removing E. Coli, Campylobacter Jejuni, Giardia Lamblia, Salmonella, Cryptosporidium, Hepatitis A virus and Legionella Pneumophila. Also the filter shows promising results even for the removal of micro-pollutants such as pesticides and drug residues.
According to the World Health Organization(WHO), at least 1.8 billion people consume water contaminated with faeces. By 2040, most of the world's population will suffer from a lack of drinking water resources. According to UNICEF, about 1,800 children die every day due to unsafe water supplies.
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