The ionic exchange is a “reversible chemical reaction that is produced when an ion from solution is exchanged by other ion with the same sign, which is combined with other immobile solid particle”. This process is usually produced, into the inorganic and organic matter, in nature.
The water has many impurities and pollutants, due to the properties as a solvent and its utilisation in many industrial processes. The mineral salts are dissolved in the water breaking down into ions. Its existence can be no desirable for the normal uses of the water. Also, the increasing interest for the environment has been that many useful treatments are stabilised in order to avoid the deterioration of the water qualities and specially due to the spilling of many pollutants such as industrial products. The exchange ionic is an important option between all possible treatments.