Nanomaterials describe, in principle, materials of which a single unit is sized (in at least one dimension) between 1 to 1000 nanometres (10−9 meter) but usually is 1 to 100 nm (the usual definition of nanoscale).
An EU team has devised a cheaper industrial wastewater treatment process using just electricity. Prototype testing demonstrated effective removal of suspended particles and oxidisation of dissolved chemicals.