List some contaminants present in rainwater



  Distilled water (also Aquadest, from lat. aqua destillata) is water (H2O) without the ions, trace elements and impurities found in normal spring water or tap water. In medicine, chemistry and biology it is used as a solvent and sometimes also as a cleaning agent.

Distilled water is obtained by distillation (evaporation and subsequent condensation) from normal tap water or from pre-cleaned water. It is largely free of salts, organic substances and microorganisms. However, it can also contain small amounts of volatile compounds.

Distillation by conventional methods is a very expensive process because of the high energy consumption. By using renewable energies such. B. the sun it is now possible through the principle of solar distillation to produce distilled water inexpensively. For everyday use, however, the less laboriously purified demineralized water is predominantly used. This is cleaned by ion exchangers. This water is marketed under the names of distillate-equivalent water, fully demineralized water, deionized water, battery water or ironing water. In certain cases, reverse osmosis is also preferred for production; this provides water that is as clean as distillation.

Since distilled water contains very few ions, it conducts electricity only to a very small extent.

Multiple distilled water

If particularly pure water is required, a single-stage distillation is no longer sufficient to achieve the desired purity and clarity. Therefore, there is double-distilled (double-distilled) water (aqua bidistillata) and triple distilled water (aqua tridestillata). Small traces of silica dissolve from glass vessels and contaminate the water during and after the distillation process. Therefore, from the second pass, water that has been distilled several times is distilled and stored in quartz or platinum vessels.

Effect on the body

Contrary to popular belief, there are no acute health risks to be feared when drinking distilled water in normal quantities. However, in the event of extremely excessive consumption, there is a risk of water poisoning, which is also present with normal water.

In some areas of the world (e.g. Southeast Asia), distilled water is sold industrially in bottles and is preferred by many as particularly "pure" drinking water.

Distilled water (but also normal drinking water) is dangerous for the body if it gets directly into the blood (e.g. via an infusion). Then body cells can burst due to the osmosis process (Hemolysis).

See also

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