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  2. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Since these systems do not work by exchanging ions, like traditional water softeners do, one benefit claimed for the user is the elimination of the need to add salt to the system. Such systems do not remove minerals from the water itself. Rather, they can only alter the downstream effects that the mineral-bearing water would otherwise have.

  3. Sulfur water - Wikipedia

    en.wikipedia.org/wiki/Sulfur_water

    Sulfur water (or sulphur water) is a condition where water is exposed to hydrogen sulfide gas, giving it a distinct "rotten egg" smell. This condition has different ...

  4. SNOX process - Wikipedia

    en.wikipedia.org/wiki/SNOX_process

    The sulfur is recovered as concentrated sulfuric acid and the nitrogen oxides are reduced to free nitrogen. The process is based on the well-known wet sulfuric acid process (WSA), a process for recovering sulfur from various process gasses in the form of commercial quality sulfuric acid (H 2 SO 4 ).

  5. Dealkalization of water - Wikipedia

    en.wikipedia.org/wiki/Dealkalization_of_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 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 ...

  6. Wet sulfuric acid process - Wikipedia

    en.wikipedia.org/wiki/Wet_sulfuric_acid_process

    The WSA process can be applied in all industries where sulfur removal presents an issue. The wet catalysis process is used for processing sulfur-containing streams, such as: [1] H 2 S gas from e.g. amine gas treating unit; Off-gas from sour water stripper (SWS) gas; Off-gas from Rectisol; Spent acid from an alkylation unit; Claus process tail gas

  7. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. The goal is to produce water that is fit for specific purposes.

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