bcdd51df_Facts_and_figures___SciDev_Net__Importance
[Product] Nanorust to remove arsenic [How it works] Magnetic nanoparticles of iron oxide suspended in water bind arsenic, which is then removed with a magnet [Developer] Rice University, United States [Importance] 
India, Bangladesh and other developing countries suffer thousands of cases of arsenic poisoning each year, linked to poisoned wells
Nanotechnology for clean water: Facts and figures - SciDev.Net
Importance