PURIFICATION TECHNOLOGIES
Deionization
DEIONIZATION is commonly used in laboratories for producing purified water on
demand. Deionization systems have typically consisted of one to four cylindrical
cartridges hooked up to plumbing lines and hanging on a wall near a sink.
Deionization
functions by exchanging hydrogen ions for cationic contaminants and hydroxyl ions
for anionic contaminants in the feedwater. The deionization resins are tiny spherical
plastic beads through which the feedwater passes. After a period of time, cations
and anions from the water displace all the active hydrogen and hydroxyl groups in
the beads and the resin must be replaced or regenerated.
Anions and cations in the
feedwater pass through the ion exchanger resins and replace the hydrogen and hydroxyl
ions attached. The hydrogen and hydroxyl ions then combine to form pure water molecules.