ion exchange resin mechanism
An ion-exchange resin or ion-exchange polymer is a resin or polymer that acts as a medium for ion exchange. It is an insoluble matrix (or support structure) normally in the form of small microbeads, usually white or yellowish, fabricated from an organic polymer substrate. The beads are typically porous, providing a large surface area on and inside them. The trapping of ions occurs along with the accompanying release of other ions, and thus the process is called ion exchange. There are multiple types of ion-exchange resin. Most commercial resins are made of polystyrene sulfonate.
Ion exchange resin is a polymer with corresponding functional groups. In general, conventional sodium ion exchange resins carry large amounts of sodium ions. When the content of calcium and magnesium ions in water is high, the ion exchange resin can release sodium ions, and the functional groups are combined with calcium and magnesium ions, so that the it can reduce content of calcium and magnesium ions in water , and the hardness of water is reduced. Hard water becomes soft water, which is the ion exchange resin mechanism.
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