c832be2d_Facts_and_figures___SciDev_Net__Product
[How it works] Membrane made up of polymers with a pore size ranging from 0.1 to 10nm [Importance] Field tested to treat drinking water in China and desalinate water in Iran, using this membrane requires less energy than reverse osmosis [Developer] Saehan Industries, Korea [Product] 
Nanofiltration membrane
Nanotechnology for clean water: Facts and figures - SciDev.Net