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  2. Wet oxidation - Wikipedia

    en.wikipedia.org/wiki/Wet_oxidation

    WAO is a liquid phase reaction using dissolved oxygen in water to oxidize wastewater contaminants. The dissolved oxygen is typically supplied using pressurized air, but pure oxygen can also be used. The oxidation reaction generally occurs at moderate temperatures of 150°-320 °C and at pressures from 10 to 220 bar.

  3. Winkler titration - Wikipedia

    en.wikipedia.org/wiki/Winkler_titration

    The Winkler test is used to determine the concentration of dissolved oxygen in water samples. Dissolved oxygen (D.O.) is widely used in water quality studies and routine operation of water reclamation facilities to analyze its level of oxygen saturation. In the test, an excess of manganese(II) salt, iodide (I −) and hydroxide (OH −) ions ...

  4. Ultrapure water - Wikipedia

    en.wikipedia.org/wiki/Ultrapure_water

    For typical raw waters feeding into the front end of an UPW purification system the raw water can contain TOC levels between 0.7 mg/L to 15 mg/L and require a robust oxidation method that can ensure there is enough oxygen available to completely convert all the carbon atoms in the organic molecules into CO 2. Robust oxidation methods that ...

  5. Oxygenated treatment - Wikipedia

    en.wikipedia.org/wiki/Oxygenated_treatment

    Oxygenated Treatment (Neutral Water Treatment) Oxygenated Treatment (Combined Water Treatment) Feedwater system piping: ferrus or mixed metallurgy (e.g. copper feedwater train) all-ferrous metallurgy: all-ferrous metallurgy: all-ferrous metallurgy Dissolved oxygen level < 10 ppb: 1 to 10 ppb: 30-50 ppb (drum), 30-150 (supercritical)

  6. Boiler feedwater - Wikipedia

    en.wikipedia.org/wiki/Boiler_feedwater

    Scale is precipitated impurities out of the water and then forms on heat transfer surfaces. This is a problem because scale does not transfer heat very well and causes the tubes to fail by getting too hot. Corrosion is caused by oxygen in the water. The oxygen causes the metal to oxidize which lowers the melting point of the metal.

  7. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    where TDS is expressed in mg/L and EC is the electrical conductivity in microsiemens per centimeter at 25 °C. The conversion factor k e varies between 0.55 and 0.8. [5] Some TDS meters use an electrical conductivity measurement to the ppm using the above formula. Regarding units, 1 ppm indicates 1 mg of dissolved solids per 1,000 g of water. [6]

  8. Oxygen - Wikipedia

    en.wikipedia.org/wiki/Oxygen

    The solubility of oxygen in water is temperature-dependent, and about twice as much (14.6 mg/L) dissolves at 0 °C than at 20 °C (7.6 mg/L). [13] [50] At 25 °C and 1 standard atmosphere (101.3 kPa) of air, freshwater can dissolve about 6.04 milliliters (mL) of oxygen per liter, and seawater contains about 4.95 mL per liter. [51] At 5 °C the ...

  9. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Rain water contains dissolved carbon dioxide taken from the atmosphere. Some of the dissolved carbon dioxide reacts with the water to form carbonic acid, which remains in solution. Minerals containing calcium and magnesium form soluble bicarbonates when exposed to carbonic acid. Water containing these minerals is known as "hard water".

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