September 3, 2019

How can these novel Nano films produce potable water by using solar light?

Anam Safri, 28

2/3 of the World is covered with water, but only 0.002% is drinkable

Access to safe drinking water is one of the basic human rights. A grand problem for the water treatment industry is the test between the valuable disinfection and creation of disinfection byproducts (DBPs). It has been confirmed that the usual disinfectants, such as chlorine and ozone form toxic DBPs like carcinogenic nitrosamines, bromate, halogenated DBPs, etc. Although, solar disinfection has been proved to be the most efficient and cost effective method, however, this method produces harmful DBPs. We have resolved this problem by engineering novel polymeric Nano films comprising of photocatalytic nanoparticles which under natural light produce free radicals to kill bacteria through a process of photo-degradation without generation of DBPs. Hence, this novel approach can be considered as the simplest and low cost process to treat ground water using natural light. These Nano films, which have been tested to have eradicated 100% of E. coli, are created through green synthesis approach, whereby, the polymer matrix holds the nanoparticles and provides non-depleting and non-leaching disinfectant that can be used for various cycles to obtain potable water. Hence, the achievement provides an easy access and cost effective route.