Glossary Of Water Treatment Industry Terms . . ."Z"
zeolite - A group of hydrated
sodium aluminosilicates, either natural or synthetic, with ion exchange
properties. (See gel zeolite, greensand.)
zeolite softening- The
removal of calcium and magnesium by ion exchange using natural or synthetic
zeolite. The term is sometimes used to refer to all ion exchange softening
processes, even though organic ion exchange resins, not inorganic zeolites,
are in most common use today.
zero soft - Water with
a total hardness less than 1.0 grain per U.S. gallon, as calcium carbonate.
zone of aeration - The
layer in the ground above an aquifer where the available voids are filled
with air. Water falling on the ground percolates through this zone on
its way to the aquifer.
zone of saturation - The layer in the ground in which all of the available voids are filled with water.