ion exchange resin


ion exchange resin

The water softener is one of the most effective systems for controlling lime scale in water. At the heart of this technology is the ion exchange resin. In this article, we will see what this specific resin is, its role as well as its benefits.

What is ion exchange resin?

A home filtering water fountain or other water softener uses the resin to remove the calcium and magnesium that cause limescale from the water. Ion exchange resins are insoluble granular substances in the form of beads with the ability to swap, without physical modification and without alteration, their sodium ions against calcium and magnesium ions of equivalent quantity and of the same polarity.

Role of ion exchange resin in water filtration

The water filter is used to reduce the hardness of the water. A quality water filter is a device that uses an ion exchange resin in the process of removing limescale which is the cause of many ailments. So the main role of the ion exchange resin is water softening.

Indeed, the principle of water softening consists of the permutation of calcium and magnesium ions which constitute the hardness of water by sodium ions bound to the resin of the softener. The softening ion exchange will be carried out on a solid support consisting of a resin initially loaded with sodium. This is how, on contact with the resin, hard water becomes soft water. When sodium ions are exchanged, the resin is said to be saturated and it must be regenerated. To do this, the resin is regenerated with brine (saturated NaCl solution or sodium chloride). The sodium ions will attach to the resin, while the chloride ions will drag the calcium and magnesium ions that were attached to the resin down the drain.

The resin is also involved in the decarbonation of water and in the treatment of several other ions such as perchlorate, boron, etc.

The advantages of resin in water filtration

The use of the ion exchange resin has several advantages. Softening the water allows you to:

Beneficial for health

By softening tap water and removing calcium and magnesium. Consuming an average of 1.5 liters per day, if we make the tap water healthier and free of harmful elements, we are contributing to our long-term well-being.

For this, the Nikken brand has been able to develop a water filtration system incorporating ion exchange resin to ensure the highest quality filtration on the market.

Orange in appearance; the ion exchange resin is placed on the lower part of the filter of the Nikken Pimag Waterfall

Extension of the service life of equipment

Depending on the hardness of the water, there is a significant impact on the life of the equipment in the house.

Preservation of ecology

By extending the life of household equipment, reducing the discharge of chemicals in sewage treatment plants and pits as well as the associated energy consumption, the water softener contributes to the preservation of the environment.


Thanks to the ion exchange resin, this will help soften and remove the calcium and magnesium that cause lime content in the water. Softening the water is a lasting solution that benefits health, personal comfort and environmental protection.

Some additional links:

  • Gravity filtration
    Gravity filtration is a new system used in water coolers. Very efficient and economical (works without electricity).
  • Activated carbon
    Activated carbon is well known for having some ability to filter water.
  • Mineral stones to energize the water
  • Silica sand
    Widely used in everyday life, especially in buildings to filter water, here we explain its beneficial use through filtering fountains for running water.
  • Why it is important to control the water
    There can be residue in the water and sometimes we can smell treatments like bleach (that’s chlorine). Can consuming these elements, certainly in very small doses, be harmful in the long term?