Softening and demineralization of water
Ion exchange resins treatments are employed for water demineralization and softening.
What about applications?
Demineralization generally occurs by passage of water throughout two beds of resins, anionic and cationic, that eliminate the salts dissolved in water by an exchange of ions. Sometimes the treatment can be made in the same plant with mixed bed resin.
Pollutants remaining in eluates produced from resin regeneration are removable with an evaporation treatment. In the softening process, in particular, calcium and magnesium ions are replaced with sodium by a passage throughout cationic resins bed.
These technologies are efficient for removal of boron from water of contaminated sites and of arsenic from groundwater bound to human consumption.