Green water-purification system works without heavy metals or corrosive chemicals

Scientists have developed an effective and energy-efficient technique for purifying water by using graphitic carbon nitride sheets. Their prototype purified pathogen-rich water in 30 minutes, killing over 99.9999 percent of bacteria, such as E. coli, meeting China's requirements for clean drinking water.

from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2019/02/190207111317.htm