• Deionized Water

Deionization is one of the most efficient processes known for removing ionic dissolved salts and minerals from water.   The deionization process is the the removal of all charged ions from the water. The term demineralization is also commonly used to describe this process.

Although the process is fairly simple in concept, its application is complicated by variables in raw water composition, treated water quality needs, resin selection, chemical dosages and control system requirments. Total Water has trained water profressionals to help determine the proper deionizer system.

This synthetic resin is charged with either hydrogen (H+) or hydroxide (OH-) ions that are displaced by the heavier cation/anion ions from the incoming water stream.

Images of deionization – cation resin bead
The deionization process requires a cation that can be displaced by all cations.		Hydrogen is the best choice because it can be displaced by any cation, including sodium.

Images of deionization – anion resin bead
The deionization process requires an anion that can be displaced by all anions.		The hydroxide ion, OH-, is displaced by all the common anions.

 

Deionized Equipment
Two Bed The cation and anion exchangers are connected in series. The cation tank removes positively charged ions (calcium, sodium, magnesium, iron,manganese and potassium). The anion tank removes negatively charged ions (sulfates, chlorides, carbonates, bicarbonates, nitrates and silica). Strong base anion units typically produce 0.2 megohm water at a pH of 8-9, whereas weak base anion units produce lower water quality, a pH of 6-7, and do not remove silica or CO2.
Mixed Bed Cation and anion resins are combined and mixed in a single tank. Thousands of cation and anion ion exchanges take place as water passes through the resin bed. Typical water quality of 2 megohm or more with neutral pH.
Mulitiple Tank Systems Three tanks or more are connected in series; or parallel; or a combination of the two. Produces high purity water in any desired quantity. Systems may consist of strong acid cation, strong or weak base anion and mixed bed media tanks in a number of varying combinations, to produce the water quality required. Water qualities of 15 megohm or more, with a neutral pH, can typically be attained.
Complete Multiple-Process Treatment Systems Exchange service tanks using other water treatment medias create a more complete high purity water system. Typically, a system may include one or more of the following processes: softening, depth filtration, carbon adsorption, UV sterilization, submicron filtration, or other treatment equipment.