In order to make drinking water safe enough, a fairly complicated water purification process is required. After all, it is a huge challenge to filter out all bacteria and pollutants in the water source. The good news is that a research team from China has proposed a new solution for sterilizing drinking water. The key to this system is the use of a piece of material called graphite carbon nitride.
Research map (via: Cell)
When irradiated by ultraviolet rays, it can produce reactive oxygen molecules (ROS for short), which can effectively kill bacteria. Scientists have proved that these substances are enough to disinfect more than 2.5 gallons of water within an hour.
In the test, the research team tried to purify the water sample infected by the pathogen. It was found that in only 30 minutes, the system can eliminate more than 99.9999% of bacteria (including E. coli).
Compared with other popular water treatment schemes, it can be more environmentally friendly, has less waste of resources, and is less likely to be polluted by heavy metals.
Senior author Dan Wang said in a statement: Disinfection technology based on photocatalysis is expected to significantly improve the dilemma faced by regions with global water shortages in the future.
Wang and his colleagues believe that this system can be used in conjunction with other water purification processes, such as further filtering metals in water sources and adjusting pH. While purifying water, achieve less waste discharge.
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