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  2. Chemical phosphorus removal - Wikipedia

    en.wikipedia.org/wiki/Chemical_phosphorus_removal

    One method of eutrophication remediation is the application of aluminum sulfate, a salt commonly used in the coagulation process of drinking water treatment.Aluminum sulfate, or "alum" as it is commonly referred, has been found to be an effective lake management tool by reducing the phosphorus load.

  3. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    When any of these pool chemicals are used, it is very important to keep the pH of the pool in the range 7.2 to 7.8 – according to the Langelier Saturation Index, or 7.8 to 8.2 – according to the Hamilton Index; higher pH drastically reduces the sanitizing power of the chlorine due to reduced oxidation-reduction potential (ORP), while lower ...

  4. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    As described by NSF/ANSI Standard 44, [8] ion-exchange devices reduce the hardness by replacing magnesium and calcium (Mg 2+ and Ca 2+) with sodium or potassium ions (Na + and K +)." Ion-exchange resins are organic polymers containing anionic functional groups to which the divalent cations (Ca 2+) bind more strongly than monovalent cations (Na +).

  5. Sodium hexametaphosphate - Wikipedia

    en.wikipedia.org/wiki/Sodium_hexametaphosphate

    Sodium hexametaphosphate (SHMP) is a salt of composition Na 6 [(PO 3) 6]. [3] Sodium hexametaphosphate of commerce is typically a mixture of metaphosphates (empirical formula: NaPO 3), of which the hexamer is one, and is usually the compound referred to by this name.

  6. How Many Americans Have Pools? Here's the Number of Swimming ...

    www.aol.com/finance/many-americans-pools-heres...

    New York. Number of Residential Swimming Pools: 503,000. Average Number of People per Pool: 38. Despite being surrounded by water, New York still has one of the highest numbers of U.S. swimming pools.

  7. Lanthanum - Wikipedia

    en.wikipedia.org/wiki/Lanthanum

    Lanthanum, like the other lanthanides, is known to affect human metabolism, lowering cholesterol levels, blood pressure, appetite, and risk of blood coagulation. When injected into the brain, it acts as a painkiller, similarly to morphine and other opiates, though the mechanism behind this is still unknown. [ 80 ]

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