760-734-5787 sales@dimewater.com

Ion Exchange

Ion Exchange water conditioning and purification process passes water through round and porous ion exchange resins. Ions that are in water are exchanged for other ions that are attached to the beads. The most common processes are deionization and softening. Water softening is commonly used as pretreatment to remove water hardness prior to reverse osmosis water processing. Water softeners have beads that trade or exchange 2 sodium ions for every magnesium and calcium ion removed.

For Deionization or DI these beads trade hydroxyl ions for anions or hydrogen ions for cations. These cation resins are produced of polystyrene chains that are cross linked by divinylbenzene with covalently anion-exchange resings that are made of polystyrene polymer chains with covantly bound ammonium groups that will trade a hydroxyl for any ion such as NO3-, CI- and SO4. The hydroven ions from the cation exchange combines with the hydroxyl ion of the anion exhcanger to form pure water. DI resins can be packaged in separate or mixed bed exchangers. Mixed bed exchange tanks enables a more effective process and will produce quality water with higher resistivity values. Resins can be regenerated by using strong bases and acids once it has reached its exchange capacity. This kind of regeneration reverses the actual purification process and exchanges the contaminants that are bound to the resins with hydroxyl and hydrogen ions. This is a very dramatic process and may damage polymer chains resulting in contamination of resin by particulates and organics resulting in problems in producing the grade or quality of water needed.

Deionization is an important part of water purification when used with other methods such as reverse osmosis, carbon and filtration. Deionization systems will remove ions, but they will not remove many microorganisms and organics. Microorganisms will attach themselves to resins, providing a culture media for bacteria growth and subsequent pyrogen generation over an extended period of time.

For this reason, we have developed the Dime lab water system:

Dime uses virgin mixed bed ion-exchange resin with extremely low TOC. This media is used only once. The resin is then discarded after use. Unlike our major competitors who dispose of the resin and housings, our system allows you to re-use the resin containers and replace only the resin.

In addition…

The Dime system can be engineered as a single system with ultraviolet disinfection, reverse osmosis and carbon adsorption if desired. Dime Water Lab Systems are the most environmentally friendly in the industry today and at the same time extremely economical to maintain.

Contact Us

For more information on deionization products and systems call 760-734-5787 or emailĀ sales@dimewater.com