How Hollow NF Membrane Water Purifier Works The surface of the hollow fiber NF membrane has pore size of 1-10nm, which can effectively filter pollutants harmful to the human body in tap water. The diameter of the smallest individual virus in water is 15-300nm, the diameter of bacteria is 200-800nm, the diameter of heavy metals (divalent and above compounds of mercury, lead, and cadmium in water) is more than 10nm, and the diameter of other large particles in the water is more than 500 nm (pesticide residues, organic matter, gel, rust, silt). Substances larger than 10 nm are naturally isolated and filtered through the principle of membrane pore size molecular sieve.
