Water Purification Technologies

Ion Exchange water purification technology means that water goes through ion-exchange resins and ions in the water are replaced by the ions that are fixed to the beads.
The most common methods of ion exchange water purification are softening and deionization.

Softening is important when the hardness of water is high. Water is called hard when it contains too many positively charged ions of Calcium and Magnesium.
In the process of ion exchange water becomes soft as the ions of calcium and magnesium are exchanged with the sodium ions. Hardness often troubles house water. Hard water is very difficult to heat, it does not easily react with soap to make foam, it damages household appliances (dish washers, clothes washing machines, heating devices, irons, etc), it’s harmful to the skin and hair.

Deionization is very effective when it used as part of water purification system with combination with other water purification technologies. Ion exchange water filters are often combined with reverse-osmosis water filters; water filters that use filtration and carbon adsorption. Deionization helps to remove ions, but they leave behind most organics or microorganisms. As bacteria are not removed they can culture in the resin.

But ion exchange water filters are irreplaceable when dissolved inorganics need to be removed. Moreover the process of the deionization is regenerable and initial cost of the ion exchange water filter is quite low.

Recently another method of water purification was invented. The new water purification technology implies using an ion exchange water filter in combination with electrodialysis. As a result the water filter deionizes water and electric current regenerate the ion exchange resin. In an ordinary ion exchange water filter regeneration happened as a result of chemical processes.

Thus removal of dissolved inorganics becomes more effective. Being quite inexpensive water filters based on electrodeionization are harmless to the environment. The do not use chemical to provide the process of regeneration. They are also non-polluting as there are no chemical and resin disposal.

Thus ion exchange water filters are widely used to for water softening and water deionization. Ion exchange water filters are an essential part of water purification systems and are used in combination with carbon water filters, with water filters that are based on water filtration and on reverse osmosis, etc

Water Filters in a Water Purification SystemDistillation and Carbon Adsorption FiltersWater Filtration Methods