This cheap material can purify dirty water and make it safe to drink
Biofoam sheets based on graphene can be laid on top of dirty or salty bodies of water to purify them and make the water safe to drink, scientists in the US have discovered.
The process – the latest awesome example of what wonder material graphene can do – has huge potential as a cheap, electricity-free water purification method for developing nations.
These dual-layer biofoam sheets work by drawing up water from underneath and then causing it to evaporate in the uppermost layer, releasing fresh water as condensation on the top and leaving particles and salts stuck in the foam.
“The process is extremely simple… the entire thing is produced in one shot,” said one of the researchers, Srikanth Singamaneni from Washington University in St. Louis.
“We hope that for countries where there is ample sunlight, such as India, you’ll be able to take some dirty water, evaporate it using our material, and collect fresh water.”