How Water Deionization Works Using Mixed Bed Anion And Cation Resins

deionizationDeionized water treatment has many purposes in the industry from semi conductor fabrication, the manufacturing of pharmaceuticals cosmetics, and even marine or aquarium enthusiasts.

Deionized water is an ultrapure sort of water with after that, anion and cation resin comes into play but releasing H+ OHwhich forms water in exchange for the Na+ Cl-. With all that said… So this works with more than just regular table salt. A well-known fact that is. Ion exchange can occur anytime So there’s a charged particle in the water -not just salt. Removal will occur for Magnesium, Calcium, Phosphates, Sulfates, Silica, and stuff As long as there’s a charge, than mixed bed DI resin will remove it.

Mixed bed DI resin has a short life if I know it’s used by itself without any pretreatment. Deionization resin going to be combined with reverse osmosis as a post treatment or at a bare minimum with sediment and chlorine removal as this will hinder the life of the filter cartridge or media. So ro system will do the major of the TDS removal while the DI filter may be used as a polisher where it removes quite a bit of the TDS, I’d say if reverse osmosis is used. Of course this will extend the life of the DI media and still give you ultrapure water. On the internet, there had been debate whether water filtered through DI media is unsafe to drink. The answer is yes and no. Remember, food grade DI media is safe to drink since it releases Hydrogen and Hydroxide ions which is essentially water. According to the type, non food grade media may release Lithium and Hydroxide ions in exchange for TDS.


Lithium Hydroxide is hazardous to our health and shouldn’t be consumed.

For semi conductor manufacturers, it means getting up to 18 mega ‘ohm cm’ resistivity and similar -ultrapure deionized water, For aquarium enthusiasts, so this means the removal of Phosphates, Silica, or Sulfates in the water that can grow algae.

Water softeners, carbon filtration, and iron removal filters as well as point of use drinking water systems for residential, commercial and industrial applications.


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