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  2. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Water softening. Idealized image of water softening process involving replacement of calcium ions in water with sodium ions donated by a cation-exchange resin. 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 ...

  3. Lime softening - Wikipedia

    en.wikipedia.org/wiki/Lime_softening

    Lime softening. 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. The process is also effective at removing a ...

  4. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environment. Water treatment removes contaminants and undesirable ...

  5. Chelation - Wikipedia

    en.wikipedia.org/wiki/Chelation

    Chelators are used in water treatment programs and specifically in steam engineering. [ citation needed ] Although the treatment is often referred to as "softening", chelation has little effect on the water's mineral content, other than to make it soluble and lower the water's pH level.

  6. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_water

    A common method for water softening involves the use of ion-exchange resins, which replace ions like Ca 2+ by twice the number of mono cations such as sodium or potassium ions. Washing soda (sodium carbonate, Na 2 CO 3) is easily obtained and has long been used as a water softener for domestic laundry, in conjunction with the usual soap or ...

  7. Dealkalization of water - Wikipedia

    en.wikipedia.org/wiki/Dealkalization_of_water

    The dealkalization of water refers to the removal of alkalinity ions from water. Chloride cycle anion ion-exchange dealkalizers remove alkalinity from water. Chloride cycle dealkalizers operate similar to sodium cycle cation water softeners. Like water softeners, dealkalizers contain ion-exchange resins that are regenerated with a concentrated ...

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