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Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions.
Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.
Water hardness is measured by the milligrams of calcium carbonate per liter of water(mg/L). Soft water: 0-60 mg/L. ... To remove hard water stains in toilet bowls and sinks, look for products that ...
Like water softeners, dealkalizers contain ion-exchange resins that are regenerated with a concentrated salt solution - NaCl. In the case of a water softener, the cation exchange resin is exchanging sodium (the Na + ion of NaCl) for hardness minerals such as calcium and magnesium.
Large cation/anion ion exchangers used in water purification of boiler feedwater [4] Ion exchange can also be used to remove hardness from water by exchanging calcium and magnesium ions for sodium ions in an ion-exchange column. Liquid-phase (aqueous) ion-exchange desalination has been demonstrated. [5]
Water purification is the process of removing undesirable ... The ability of water to precipitate calcium carbonate to protect metal surfaces and reduce the ...
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