Chemical Processes

Ion exchange is a chemical process used primarily for water treatment and purification, as well as in various industrial processes.

Ion exchange is a water treatment process that involves the removal of dissolved ions from water through a reversible chemical reaction. It utilises a resin material with charged sites that attract and exchange ions in the water with ions of similar charge that are bound to the resin.

In water treatment, ion exchange is often used for the removal of harmful contaminants such as heavy metals (e.g., lead, mercury), hardness ions (e.g., calcium, magnesium), and certain dissolved salts (e.g., nitrate, sulfate). The process typically involves passing water through a column filled with resin beads. As the water flows through the column, the ions in the water bind to the charged sites on the resin beads, displacing ions of similar charge that were previously bound to the resin.

Ion Filtering

Once the resin becomes saturated with undesirable ions, it can be regenerated by passing a concentrated solution of ions that displace the contaminants from the resin. This allows the resin to be reused multiple times before it needs to be replaced.

Ion exchange is an effective method for water softening, demineralisation, and the removal of specific contaminants, making it a valuable tool in water treatment for both industrial and some municipal applications.

Ion Exchange

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Ion Exchange