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Anion and cation switches are respectively fill Yin and Yang of resin resin switches. Cationic exchange was used in removing a positive charge ion (cationic), Yin resin used to remove the negative ion (anion).
Cation exchange resin is H + ions will become replacement cation, such as calcium, magnesium and sodium ions; Anion exchange resin is will OH-ions become replacement of anionic, such as chloride ion, sulfate ion and heavy carbonic acid root of the replacement of H + ions, and OH-synthetic form water, remove the water of ions.
The resin exchange ability is limited, in its ability to exchange after running out to regenerate. The ability of the exchange out there is balance between adsorbed ions form, cationic resin regeneration is of acid processing, the general hydrochloric acid, which is the regeneration of H + ions to fill. Anionic resin regeneration generally use sodium hydroxide, use OH-ions filling. Regeneration can use the column to renewable exchange ions in column, the equipment can also through the installation renewable to ion equipment and reclamation equipment and chemical methods in the column.