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  2. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Complete removal of ions from water is possible if the right conditions are met. The water is normally pre-treated with a reverse osmosis unit to remove non-ionic organic contaminants, and with gas transfer membranes to remove carbon dioxide. A water recovery of 99% is possible if the concentrate stream is fed to the RO inlet.

  3. Water sachet - Wikipedia

    en.wikipedia.org/wiki/Water_sachet

    Water sachets or sachet water is a common form of selling pre-filtered or sanitized water in plastic, heat sealed bags in parts of the global south, and are especially popular in Africa. [1] Water sachets are cheaper to produce than plastic bottles, and easier to transport. [2] In some countries, water vendors refer to sachet water as "pure water".

  4. Substitution effect - Wikipedia

    en.wikipedia.org/wiki/Substitution_effect

    The overall effect of the price change is that the consumer now chooses the consumption bundle at point C. But the move from A to C can be decomposed into two parts. The substitution effect is the change that would occur if the consumer were required to remain on the original indifference curve; this is the move from A to B. The income effect ...

  5. Purified water - Wikipedia

    en.wikipedia.org/wiki/Purified_water

    Purification removes contaminants that may interfere with processes, or leave residues on evaporation. Although water is generally considered to be a good electrical conductor—for example, domestic electrical systems are considered particularly hazardous to people if they may be in contact with wet surfaces—pure water is a poor conductor ...

  6. Fresh water - Wikipedia

    en.wikipedia.org/wiki/Fresh_water

    Water pollution may affect either surface water or groundwater. This form of pollution can lead to many problems. One is the degradation of aquatic ecosystems. Another is spreading water-borne diseases when people use polluted water for drinking or irrigation. [34]

  7. ‘It just keeps coming and coming’: Heavy lake-effect snow ...

    www.aol.com/heavy-lake-effect-snow-creates...

    Editor’s Note: Read the latest on the lake-effect snow here.This story is no longer being updated. As biting cold temperatures sweep across a large swath of the US, parts of the Great Lakes face ...

  8. The Mandela effect: 10 examples that explain what it is and ...

    www.aol.com/lifestyle/mandela-effect-10-examples...

    "The Mandela Effect is a pervasive false memory where people are very confident about a memory they have that's incorrect," Bainbridge tells Yahoo. It's often associated with pop culture.

  9. Properties of water - Wikipedia

    en.wikipedia.org/wiki/Properties_of_water

    A salt or acid contaminant level exceeding even 100 parts per trillion (ppt) in otherwise ultra-pure water begins to noticeably lower its resistivity by up to several kΩ·m. [citation needed] In pure water, sensitive equipment can detect a very slight electrical conductivity of 0.05501 ± 0.0001 μS/cm at 25.00 °C. [56]