Ion exchange for every application
Depending on the application of the water, the ion exchange is always tailored to the requirements. The continuous development of intelligent resins further refines the process and optimizes the processes described below.
– Water softening
– Partial desalination of water
– Selective ion exchange
During water softening, the ion exchanger exchanges the ions of calcium and magnesium for sodium ions. Thus, the process removes the hardness-forming salts. However, since too soft water has disadvantages, a targeted process is required. The process control takes place, inter alia, via the selection of the ion exchange material. In this form of water softening one speaks of salination.
Partial desalination decarbonates the water to prevent the formation of limestone. For this purpose, the ion exchanger exchanges the carbonic acid-bound calcium and magnesium ions (hydrogen carbonate) with hydrogen ions. The result is softer water with a lower salt content and the released carbonic acid character.
Selective exchange of anions or cations occurs during selective ion exchange. This process is only used in the industrial sector and uses special resins as the ion exchange material. As an example of application is the removal of dissolved heavy metal ions from galvanic wastewater.
In demineralisation, the ion exchanger produces pure water. He removes in a multi-step process all salts dissolved in the water. The result is demineralised water, also known as demineralised water.